diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.cpp b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.cpp
index cc969b7..7c21f0e 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.cpp
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.cpp
@@ -9,15 +9,15 @@ extern SPI_HandleTypeDef hspi1;
 extern UART_HandleTypeDef huart3;
 
 // Chip Select GPIO definitions
-static const struct {
-    GPIO_TypeDef* port;
-    uint16_t pin;
-} CHIP_SELECTS[4] = {
-    {GPIOA, GPIO_PIN_0}, // ADAR1000 #1
-    {GPIOA, GPIO_PIN_1}, // ADAR1000 #2
-    {GPIOA, GPIO_PIN_2}, // ADAR1000 #3
-    {GPIOA, GPIO_PIN_3}  // ADAR1000 #4
-};
+static const struct {
+    GPIO_TypeDef* port;
+    uint16_t pin;
+} CHIP_SELECTS[4] = {
+    {ADAR_1_CS_3V3_GPIO_Port, ADAR_1_CS_3V3_Pin}, // ADAR1000 #1
+    {ADAR_2_CS_3V3_GPIO_Port, ADAR_2_CS_3V3_Pin}, // ADAR1000 #2
+    {ADAR_3_CS_3V3_GPIO_Port, ADAR_3_CS_3V3_Pin}, // ADAR1000 #3
+    {ADAR_4_CS_3V3_GPIO_Port, ADAR_4_CS_3V3_Pin}  // ADAR1000 #4
+};
 
 // Vector Modulator lookup tables
 const uint8_t ADAR1000Manager::VM_I[128] = {
@@ -162,15 +162,15 @@ bool ADAR1000Manager::setBeamAngle(float angle_degrees, BeamDirection direction)
 
     for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
         for (uint8_t ch = 0; ch < 4; ++ch) {
-            if (direction == BeamDirection::TX) {
-                adarSetTxPhase(dev, ch + 1, phase_settings[ch], BROADCAST_OFF);
-                adarSetTxVgaGain(dev, ch + 1, 0x7F, BROADCAST_OFF);
-            } else {
-                adarSetRxPhase(dev, ch + 1, phase_settings[ch], BROADCAST_OFF);
-                adarSetRxVgaGain(dev, ch + 1, 30, BROADCAST_OFF);
-            }
-        }
-    }
+            if (direction == BeamDirection::TX) {
+                adarSetTxPhase(dev, ch + 1, phase_settings[ch], BROADCAST_OFF);
+                adarSetTxVgaGain(dev, ch + 1, kDefaultTxVgaGain, BROADCAST_OFF);
+            } else {
+                adarSetRxPhase(dev, ch + 1, phase_settings[ch], BROADCAST_OFF);
+                adarSetRxVgaGain(dev, ch + 1, kDefaultRxVgaGain, BROADCAST_OFF);
+            }
+        }
+    }
     return true;
 }
 
@@ -326,59 +326,57 @@ bool ADAR1000Manager::initializeADTR1107Sequence() {
     const uint8_t msg[] = "Starting ADTR1107 Power Sequence...\r\n";
     HAL_UART_Transmit(&huart3, msg, sizeof(msg) - 1, 1000);
 
-    // Step 1: Connect all GND pins to ground (assumed in hardware)
-
-    // Step 2: Set VDD_SW to 3.3V
-    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_15, GPIO_PIN_SET); // EN_P_3V3_VDD_SW
-    HAL_Delay(1);
-
-    // Step 3: Set VSS_SW to -3.3V
-    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_14, GPIO_PIN_SET); // EN_P_3V3_SW
-    HAL_Delay(1);
+    // Step 1: Connect all GND pins to ground (assumed in hardware)
+
+    // Step 2: Set VDD_SW to 3.3V
+    HAL_GPIO_WritePin(EN_P_3V3_VDD_SW_GPIO_Port, EN_P_3V3_VDD_SW_Pin, GPIO_PIN_SET);
+    HAL_Delay(1);
+
+    // Step 3: Set VSS_SW to -3.3V
+    HAL_GPIO_WritePin(EN_P_3V3_SW_GPIO_Port, EN_P_3V3_SW_Pin, GPIO_PIN_SET);
+    HAL_Delay(1);
 
     // Step 4: Set CTRL_SW to RX mode initially via GPIO
     setADTR1107Control(false); // RX mode
     HAL_Delay(1);
 
     // Step 5: Set VGG_LNA to 0
-    uint8_t lna_bias_voltage = 0x00; // Example value, adjust based on your LNA requirements
-    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-        adarWrite(dev, REG_LNA_BIAS_ON, lna_bias_voltage, BROADCAST_OFF);
-        adarWrite(dev, REG_LNA_BIAS_OFF, 0x00, BROADCAST_OFF);
-    }
-
-    // Step 6: Set VDD_LNA to 0V for TX mode
-    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_RESET); // EN_P_3V3_LNA
-    HAL_Delay(2);
+    uint8_t lna_bias_voltage = kLnaBiasOff;
+    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+        adarWrite(dev, REG_LNA_BIAS_ON, lna_bias_voltage, BROADCAST_OFF);
+        adarWrite(dev, REG_LNA_BIAS_OFF, kLnaBiasOff, BROADCAST_OFF);
+    }
+
+    // Step 6: Set VDD_LNA to 0V for TX mode
+    HAL_GPIO_WritePin(EN_P_3V3_ADTR_GPIO_Port, EN_P_3V3_ADTR_Pin, GPIO_PIN_RESET);
+    HAL_Delay(2);
 
     // Step 7: Set VGG_PA to safe negative voltage (PA off for TX mode)
     /*A 0x00 value in the
     on or off bias registers, correspond to a 0 V output. A 0xFF in the
     on or off bias registers correspond to a −4.8 V output.*/
-    uint8_t safe_pa_bias = 0x5D; // Safe negative voltage (-1.75V) to keep PA off
-    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-        adarWrite(dev, REG_PA_CH1_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
-        adarWrite(dev, REG_PA_CH2_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
+    uint8_t safe_pa_bias = kPaBiasTxSafe; // Safe negative voltage (-1.75V) to keep PA off
+    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+        adarWrite(dev, REG_PA_CH1_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
+        adarWrite(dev, REG_PA_CH2_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH3_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH4_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
     }
-    HAL_Delay(10);
-
-    // Step 8: Set VDD_PA to 0V (PA powered up for TX mode)
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_0, GPIO_PIN_SET); // EN_P_5V0_PA
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_SET);
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_2, GPIO_PIN_SET);
-    HAL_Delay(50);
+    HAL_Delay(10);
+
+    // Step 8: Set VDD_PA to 0V (PA powered up for TX mode)
+    enablePASupplies();
+    HAL_Delay(50);
 
     // Step 9: Adjust VGG_PA voltage between −1.75 V and −0.25 V to achieve the desired IDQ_PA=220mA
     //Set VGG_PA to safe negative voltage (PA off for TX mode)
     /*A 0x00 value in the
     on or off bias registers, correspond to a 0 V output. A 0xFF in the
     on or off bias registers correspond to a −4.8 V output.*/
-    uint8_t Idq_pa_bias = 0x0D; // Safe negative voltage (-0.2447V) to keep PA off
-    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-        adarWrite(dev, REG_PA_CH1_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
-        adarWrite(dev, REG_PA_CH2_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
+    uint8_t Idq_pa_bias = kPaBiasIdqCalibration; // Safe negative voltage (-0.2447V) to keep PA off
+    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+        adarWrite(dev, REG_PA_CH1_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
+        adarWrite(dev, REG_PA_CH2_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH3_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH4_BIAS_ON, Idq_pa_bias, BROADCAST_OFF);
     }
@@ -429,30 +427,28 @@ bool ADAR1000Manager::setAllDevicesRXMode() {
 }
 
 void ADAR1000Manager::setADTR1107Mode(BeamDirection direction) {
-    if (direction == BeamDirection::TX) {
-        setADTR1107Control(true); // TX mode
-
-        // Step 1: Disable LNA power first
-        HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_RESET); // Disable LNA power
-        HAL_Delay(5);
-
-        // Step 2: Set LNA bias to safe off value
-        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-            adarWrite(dev, REG_LNA_BIAS_ON, 0x00, BROADCAST_OFF); // Turn off LNA bias
-        }
-        HAL_Delay(5);
-
-        // Step 3: Enable PA power
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_0, GPIO_PIN_SET); // EN_P_5V0_PA
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_SET);
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_2, GPIO_PIN_SET);
-        HAL_Delay(10);
-
-        // Step 4: Set PA bias to operational value
-        uint8_t operational_pa_bias = 0x7F; // Maximum bias for full power
-        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-            adarWrite(dev, REG_PA_CH1_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
-            adarWrite(dev, REG_PA_CH2_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
+    if (direction == BeamDirection::TX) {
+        setADTR1107Control(true); // TX mode
+
+        // Step 1: Disable LNA power first
+        disableLNASupplies();
+        HAL_Delay(5);
+
+        // Step 2: Set LNA bias to safe off value
+        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+            adarWrite(dev, REG_LNA_BIAS_ON, kLnaBiasOff, BROADCAST_OFF); // Turn off LNA bias
+        }
+        HAL_Delay(5);
+
+        // Step 3: Enable PA power
+        enablePASupplies();
+        HAL_Delay(10);
+
+        // Step 4: Set PA bias to operational value
+        uint8_t operational_pa_bias = kPaBiasOperational; // Maximum bias for full power
+        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+            adarWrite(dev, REG_PA_CH1_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
+            adarWrite(dev, REG_PA_CH2_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
             adarWrite(dev, REG_PA_CH3_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
             adarWrite(dev, REG_PA_CH4_BIAS_ON, operational_pa_bias, BROADCAST_OFF);
         }
@@ -466,33 +462,31 @@ void ADAR1000Manager::setADTR1107Mode(BeamDirection direction) {
 
     } else {
         // RECEIVE MODE: Enable LNA, Disable PA
-        setADTR1107Control(false); // RX mode
-
-        // Step 1: Disable PA power first
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_0, GPIO_PIN_RESET); // EN_P_5V0_PA
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_RESET);
-        HAL_GPIO_WritePin(GPIOG, GPIO_PIN_2, GPIO_PIN_RESET);
-        HAL_Delay(5);
-
-        // Step 2: Set PA bias to safe negative voltage
-        uint8_t safe_pa_bias = 0x20;
-        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-            adarWrite(dev, REG_PA_CH1_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
-            adarWrite(dev, REG_PA_CH2_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
+        setADTR1107Control(false); // RX mode
+
+        // Step 1: Disable PA power first
+        disablePASupplies();
+        HAL_Delay(5);
+
+        // Step 2: Set PA bias to safe negative voltage
+        uint8_t safe_pa_bias = kPaBiasRxSafe;
+        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+            adarWrite(dev, REG_PA_CH1_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
+            adarWrite(dev, REG_PA_CH2_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
             adarWrite(dev, REG_PA_CH3_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
             adarWrite(dev, REG_PA_CH4_BIAS_ON, safe_pa_bias, BROADCAST_OFF);
         }
-        HAL_Delay(5);
-
-        // Step 3: Enable LNA power
-        HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_SET); // EN_P_3V3_LNA
-        HAL_Delay(10);
-
-        // Step 4: Set LNA bias to operational value
-        uint8_t operational_lna_bias = 0x30; // Adjust based on your LNA requirements
-        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-            adarWrite(dev, REG_LNA_BIAS_ON, operational_lna_bias, BROADCAST_OFF);
-        }
+        HAL_Delay(5);
+
+        // Step 3: Enable LNA power
+        enableLNASupplies();
+        HAL_Delay(10);
+
+        // Step 4: Set LNA bias to operational value
+        uint8_t operational_lna_bias = kLnaBiasOperational;
+        for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+            adarWrite(dev, REG_LNA_BIAS_ON, operational_lna_bias, BROADCAST_OFF);
+        }
         HAL_Delay(5);
 
         // Step 5: Set TR switch to RX mode
@@ -535,42 +529,42 @@ bool ADAR1000Manager::setCustomBeamPattern16(const uint8_t phase_pattern[16], Be
     return true;
 }
 
-void ADAR1000Manager::enablePASupplies() {
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_0, GPIO_PIN_SET); // EN_P_5V0_PA
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_SET);
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_2, GPIO_PIN_SET);
-}
-
-void ADAR1000Manager::disablePASupplies() {
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_0, GPIO_PIN_RESET); // EN_P_5V0_PA
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_RESET);
-    HAL_GPIO_WritePin(GPIOG, GPIO_PIN_2, GPIO_PIN_RESET);
-}
-
-void ADAR1000Manager::enableLNASupplies() {
-    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_SET); // EN_P_3V3_LNA
-}
-
-void ADAR1000Manager::disableLNASupplies() {
-    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_13, GPIO_PIN_RESET); // EN_P_3V3_LNA
-}
-
-void ADAR1000Manager::setPABias(bool enable) {
-    uint8_t pa_bias = enable ? 0x7F : 0x20; // Operational vs safe bias
-
-    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-        adarWrite(dev, REG_PA_CH1_BIAS_ON, pa_bias, BROADCAST_OFF);
+void ADAR1000Manager::enablePASupplies() {
+    HAL_GPIO_WritePin(EN_P_5V0_PA1_GPIO_Port, EN_P_5V0_PA1_Pin, GPIO_PIN_SET);
+    HAL_GPIO_WritePin(EN_P_5V0_PA2_GPIO_Port, EN_P_5V0_PA2_Pin, GPIO_PIN_SET);
+    HAL_GPIO_WritePin(EN_P_5V0_PA3_GPIO_Port, EN_P_5V0_PA3_Pin, GPIO_PIN_SET);
+}
+
+void ADAR1000Manager::disablePASupplies() {
+    HAL_GPIO_WritePin(EN_P_5V0_PA1_GPIO_Port, EN_P_5V0_PA1_Pin, GPIO_PIN_RESET);
+    HAL_GPIO_WritePin(EN_P_5V0_PA2_GPIO_Port, EN_P_5V0_PA2_Pin, GPIO_PIN_RESET);
+    HAL_GPIO_WritePin(EN_P_5V0_PA3_GPIO_Port, EN_P_5V0_PA3_Pin, GPIO_PIN_RESET);
+}
+
+void ADAR1000Manager::enableLNASupplies() {
+    HAL_GPIO_WritePin(EN_P_3V3_ADTR_GPIO_Port, EN_P_3V3_ADTR_Pin, GPIO_PIN_SET);
+}
+
+void ADAR1000Manager::disableLNASupplies() {
+    HAL_GPIO_WritePin(EN_P_3V3_ADTR_GPIO_Port, EN_P_3V3_ADTR_Pin, GPIO_PIN_RESET);
+}
+
+void ADAR1000Manager::setPABias(bool enable) {
+    uint8_t pa_bias = enable ? kPaBiasOperational : kPaBiasRxSafe; // Operational vs safe bias
+
+    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+        adarWrite(dev, REG_PA_CH1_BIAS_ON, pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH2_BIAS_ON, pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH3_BIAS_ON, pa_bias, BROADCAST_OFF);
         adarWrite(dev, REG_PA_CH4_BIAS_ON, pa_bias, BROADCAST_OFF);
     }
-}
-
-void ADAR1000Manager::setLNABias(bool enable) {
-    uint8_t lna_bias = enable ? 0x30 : 0x00; // Operational vs off
-
-    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
-        adarWrite(dev, REG_LNA_BIAS_ON, lna_bias, BROADCAST_OFF);
+}
+
+void ADAR1000Manager::setLNABias(bool enable) {
+    uint8_t lna_bias = enable ? kLnaBiasOperational : kLnaBiasOff; // Operational vs off
+
+    for (uint8_t dev = 0; dev < devices_.size(); ++dev) {
+        adarWrite(dev, REG_LNA_BIAS_ON, lna_bias, BROADCAST_OFF);
     }
 }
 
@@ -739,11 +733,11 @@ void ADAR1000Manager::adarSetTxVgaGain(uint8_t deviceIndex, uint8_t channel, uin
     adarWrite(deviceIndex, REG_LOAD_WORKING, LD_WRK_REGS_LDTX_OVERRIDE, broadcast);
 }
 
-void ADAR1000Manager::adarSetTxBias(uint8_t deviceIndex, uint8_t broadcast) {
-    adarWrite(deviceIndex, REG_BIAS_CURRENT_TX, 0x2D, broadcast);
-    adarWrite(deviceIndex, REG_BIAS_CURRENT_TX_DRV, 0x06, broadcast);
-    adarWrite(deviceIndex, REG_LOAD_WORKING, 0x2, broadcast);
-}
+void ADAR1000Manager::adarSetTxBias(uint8_t deviceIndex, uint8_t broadcast) {
+    adarWrite(deviceIndex, REG_BIAS_CURRENT_TX, kTxBiasCurrent, broadcast);
+    adarWrite(deviceIndex, REG_BIAS_CURRENT_TX_DRV, kTxDriverBiasCurrent, broadcast);
+    adarWrite(deviceIndex, REG_LOAD_WORKING, 0x2, broadcast);
+}
 
 uint8_t ADAR1000Manager::adarAdcRead(uint8_t deviceIndex, uint8_t broadcast) {
     adarWrite(deviceIndex, REG_ADC_CONTROL, ADAR1000_ADC_ST_CONV, broadcast);
diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.h b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.h
index 165c5c5..506e0d8 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.h
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/ADAR1000_Manager.h
@@ -116,13 +116,25 @@ public:
     bool beam_sweeping_active_ = false;
     uint32_t last_beam_update_time_ = 0;
 
-    // Lookup tables
-    static const uint8_t VM_I[128];
-    static const uint8_t VM_Q[128];
-    static const uint8_t VM_GAIN[128];
-
-    // Private Methods
-    bool initializeSingleDevice(uint8_t deviceIndex);
+    // Lookup tables
+    static const uint8_t VM_I[128];
+    static const uint8_t VM_Q[128];
+    static const uint8_t VM_GAIN[128];
+
+    // Named defaults for the ADTR1107 and ADAR1000 power sequence.
+    static constexpr uint8_t kDefaultTxVgaGain = 0x7F;
+    static constexpr uint8_t kDefaultRxVgaGain = 30;
+    static constexpr uint8_t kLnaBiasOff = 0x00;
+    static constexpr uint8_t kLnaBiasOperational = 0x30;
+    static constexpr uint8_t kPaBiasTxSafe = 0x5D;
+    static constexpr uint8_t kPaBiasIdqCalibration = 0x0D;
+    static constexpr uint8_t kPaBiasOperational = 0x7F;
+    static constexpr uint8_t kPaBiasRxSafe = 0x20;
+    static constexpr uint8_t kTxBiasCurrent = 0x2D;
+    static constexpr uint8_t kTxDriverBiasCurrent = 0x06;
+
+    // Private Methods
+    bool initializeSingleDevice(uint8_t deviceIndex);
     bool initializeADTR1107Sequence();
     void calculatePhaseSettings(float angle_degrees, uint8_t phase_settings[4]);
     void delayUs(uint32_t microseconds);
diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.c b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.c
index 2c735fd..6f6c8e9 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.c
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.c
@@ -1,121 +1,173 @@
-#include "GY_85_HAL.h"
+#include "GY_85_HAL.h"
+
+static int16_t g_offx = 0, g_offy = 0, g_offz = 0;
+
+// ---------------- Internal Functions ---------------- //
+static bool GY85_SetAccelerometer(void);
+static bool GY85_ReadAccelerometer(GY85_t *imu);
+static bool GY85_SetCompass(void);
+static bool GY85_ReadCompass(GY85_t *imu);
+static bool GY85_SetGyro(void);
+static bool GY85_GyroCalibrate(void);
+static bool GY85_ReadGyro(GY85_t *imu);
+static bool GY85_WriteRegister(uint16_t address, uint8_t reg, uint8_t value);
+static bool GY85_ReadRegisters(uint16_t address, uint8_t reg, uint8_t *buffer, uint16_t length);
+
+// ---------------- Initialization ---------------- //
+bool GY85_Init(void)
+{
+    if (!GY85_SetAccelerometer()) {
+        return false;
+    }
+    if (!GY85_SetCompass()) {
+        return false;
+    }
+    return GY85_SetGyro();
+}
+
+// ---------------- Update All Sensors ---------------- //
+bool GY85_Update(GY85_t *imu)
+{
+    GY85_t next_sample;
+
+    if (imu == NULL) {
+        return false;
+    }
+
+    next_sample = *imu;
+
+    if (!GY85_ReadAccelerometer(&next_sample)) {
+        return false;
+    }
+    if (!GY85_ReadCompass(&next_sample)) {
+        return false;
+    }
+    if (!GY85_ReadGyro(&next_sample)) {
+        return false;
+    }
+
+    *imu = next_sample;
+    return true;
+}
+
+// ---------------- Accelerometer ---------------- //
+static bool GY85_SetAccelerometer(void)
+{
+    if (!GY85_WriteRegister(ADXL345_ADDR, 0x31, 0x01)) {
+        return false;
+    }
+
+    return GY85_WriteRegister(ADXL345_ADDR, 0x2D, 0x08);
+}
+
+static bool GY85_ReadAccelerometer(GY85_t *imu)
+{
+    uint8_t buf[6];
+
+    if (imu == NULL || !GY85_ReadRegisters(ADXL345_ADDR, 0x32, buf, sizeof(buf))) {
+        return false;
+    }
+
+    imu->ax = (int16_t)((buf[1] << 8) | buf[0]);
+    imu->ay = (int16_t)((buf[3] << 8) | buf[2]);
+    imu->az = (int16_t)((buf[5] << 8) | buf[4]);
+    return true;
+}
+
+// ---------------- Compass ---------------- //
+static bool GY85_SetCompass(void)
+{
+    return GY85_WriteRegister(HMC5883_ADDR, 0x02, 0x00);
+}
+
+static bool GY85_ReadCompass(GY85_t *imu)
+{
+    uint8_t buf[6];
+
+    if (imu == NULL || !GY85_ReadRegisters(HMC5883_ADDR, 0x03, buf, sizeof(buf))) {
+        return false;
+    }
+
+    imu->mx = (int16_t)((buf[0] << 8) | buf[1]);
+    imu->mz = (int16_t)((buf[2] << 8) | buf[3]);
+    imu->my = (int16_t)((buf[4] << 8) | buf[5]);
+    return true;
+}
+
+// ---------------- Gyroscope ---------------- //
+static bool GY85_SetGyro(void)
+{
+    if (!GY85_WriteRegister(ITG3200_ADDR, 0x3E, 0x00)) {
+        return false;
+    }
+
+    if (!GY85_WriteRegister(ITG3200_ADDR, 0x15, 0x07)) {
+        return false;
+    }
+
+    if (!GY85_WriteRegister(ITG3200_ADDR, 0x16, 0x1E)) {
+        return false;
+    }
+
+    if (!GY85_WriteRegister(ITG3200_ADDR, 0x17, 0x00)) {
+        return false;
+    }
+
+    HAL_Delay(10);
+    return GY85_GyroCalibrate();
+}
+
+static bool GY85_GyroCalibrate(void)
+{
+    int32_t tmpx = 0, tmpy = 0, tmpz = 0;
+    GY85_t imu;
 
-static int16_t g_offx = 0, g_offy = 0, g_offz = 0;
-
-// ---------------- Internal Functions ---------------- //
-static void GY85_SetAccelerometer(void);
-static void GY85_ReadAccelerometer(GY85_t *imu);
-static void GY85_SetCompass(void);
-static void GY85_ReadCompass(GY85_t *imu);
-static void GY85_SetGyro(void);
-static void GY85_GyroCalibrate(void);
-static void GY85_ReadGyro(GY85_t *imu);
-
-// ---------------- Initialization ---------------- //
-void GY85_Init(void)
-{
-    GY85_SetAccelerometer();
-    GY85_SetCompass();
-    GY85_SetGyro();
-}
-
-// ---------------- Update All Sensors ---------------- //
-void GY85_Update(GY85_t *imu)
-{
-    GY85_ReadAccelerometer(imu);
-    GY85_ReadCompass(imu);
-    GY85_ReadGyro(imu);
-}
-
-// ---------------- Accelerometer ---------------- //
-static void GY85_SetAccelerometer(void)
-{
-    uint8_t data[2];
-    data[0] = 0x31; data[1] = 0x01;
-    HAL_I2C_Master_Transmit(&hi2c3, ADXL345_ADDR, data, 2, HAL_MAX_DELAY);
-
-    data[0] = 0x2D; data[1] = 0x08;
-    HAL_I2C_Master_Transmit(&hi2c3, ADXL345_ADDR, data, 2, HAL_MAX_DELAY);
-}
-
-static void GY85_ReadAccelerometer(GY85_t *imu)
-{
-    uint8_t reg = 0x32;
-    uint8_t buf[6];
-    HAL_I2C_Master_Transmit(&hi2c3, ADXL345_ADDR, &reg, 1, HAL_MAX_DELAY);
-    HAL_I2C_Master_Receive(&hi2c3, ADXL345_ADDR, buf, 6, HAL_MAX_DELAY);
-
-    imu->ax = (int16_t)((buf[1] << 8) | buf[0]);
-    imu->ay = (int16_t)((buf[3] << 8) | buf[2]);
-    imu->az = (int16_t)((buf[5] << 8) | buf[4]);
-}
-
-// ---------------- Compass ---------------- //
-static void GY85_SetCompass(void)
-{
-    uint8_t data[2] = {0x02, 0x00};
-    HAL_I2C_Master_Transmit(&hi2c3, HMC5883_ADDR, data, 2, HAL_MAX_DELAY);
-}
-
-static void GY85_ReadCompass(GY85_t *imu)
-{
-    uint8_t reg = 0x03;
-    uint8_t buf[6];
-    HAL_I2C_Master_Transmit(&hi2c3, HMC5883_ADDR, &reg, 1, HAL_MAX_DELAY);
-    HAL_I2C_Master_Receive(&hi2c3, HMC5883_ADDR, buf, 6, HAL_MAX_DELAY);
-
-    imu->mx = (int16_t)((buf[0] << 8) | buf[1]);
-    imu->mz = (int16_t)((buf[2] << 8) | buf[3]);
-    imu->my = (int16_t)((buf[4] << 8) | buf[5]);
-}
-
-// ---------------- Gyroscope ---------------- //
-static void GY85_SetGyro(void)
-{
-    uint8_t data[2];
-    data[0] = 0x3E; data[1] = 0x00;
-    HAL_I2C_Master_Transmit(&hi2c3, ITG3200_ADDR, data, 2, HAL_MAX_DELAY);
-
-    data[0] = 0x15; data[1] = 0x07;
-    HAL_I2C_Master_Transmit(&hi2c3, ITG3200_ADDR, data, 2, HAL_MAX_DELAY);
-
-    data[0] = 0x16; data[1] = 0x1E;
-    HAL_I2C_Master_Transmit(&hi2c3, ITG3200_ADDR, data, 2, HAL_MAX_DELAY);
-
-    data[0] = 0x17; data[1] = 0x00;
-    HAL_I2C_Master_Transmit(&hi2c3, ITG3200_ADDR, data, 2, HAL_MAX_DELAY);
-
-    HAL_Delay(10);
-    GY85_GyroCalibrate();
-}
-
-static void GY85_GyroCalibrate(void)
-{
-    int32_t tmpx = 0, tmpy = 0, tmpz = 0;
-    GY85_t imu;
-
-    for(uint8_t i = 0; i < 10; i++)
-    {
-        HAL_Delay(10);
-        GY85_ReadGyro(&imu);
-        tmpx += imu.gx;
-        tmpy += imu.gy;
-        tmpz += imu.gz;
+    for(uint8_t i = 0; i < 10; i++)
+    {
+        HAL_Delay(10);
+        if (!GY85_ReadGyro(&imu)) {
+            return false;
+        }
+        tmpx += imu.gx;
+        tmpy += imu.gy;
+        tmpz += imu.gz;
     }
 
-    g_offx = tmpx / 10;
-    g_offy = tmpy / 10;
-    g_offz = tmpz / 10;
-}
-
-static void GY85_ReadGyro(GY85_t *imu)
-{
-    uint8_t reg = 0x1B;
-    uint8_t buf[8];
-    HAL_I2C_Master_Transmit(&hi2c3, ITG3200_ADDR, &reg, 1, HAL_MAX_DELAY);
-    HAL_I2C_Master_Receive(&hi2c3, ITG3200_ADDR, buf, 8, HAL_MAX_DELAY);
-
-    imu->gx = ((int16_t)((buf[2] << 8) | buf[3])) - g_offx;
-    imu->gy = ((int16_t)((buf[4] << 8) | buf[5])) - g_offy;
-    imu->gz = ((int16_t)((buf[6] << 8) | buf[7])) - g_offz;
-}
+    g_offx = tmpx / 10;
+    g_offy = tmpy / 10;
+    g_offz = tmpz / 10;
+    return true;
+}
+
+static bool GY85_ReadGyro(GY85_t *imu)
+{
+    uint8_t buf[8];
+
+    if (imu == NULL || !GY85_ReadRegisters(ITG3200_ADDR, 0x1B, buf, sizeof(buf))) {
+        return false;
+    }
+
+    imu->gx = ((int16_t)((buf[2] << 8) | buf[3])) - g_offx;
+    imu->gy = ((int16_t)((buf[4] << 8) | buf[5])) - g_offy;
+    imu->gz = ((int16_t)((buf[6] << 8) | buf[7])) - g_offz;
+    return true;
+}
+
+static bool GY85_WriteRegister(uint16_t address, uint8_t reg, uint8_t value)
+{
+    uint8_t data[2] = {reg, value};
+    return HAL_I2C_Master_Transmit(&hi2c3, address, data, sizeof(data), HAL_MAX_DELAY) == HAL_OK;
+}
+
+static bool GY85_ReadRegisters(uint16_t address, uint8_t reg, uint8_t *buffer, uint16_t length)
+{
+    if (buffer == NULL) {
+        return false;
+    }
+
+    if (HAL_I2C_Master_Transmit(&hi2c3, address, &reg, 1, HAL_MAX_DELAY) != HAL_OK) {
+        return false;
+    }
+
+    return HAL_I2C_Master_Receive(&hi2c3, address, buffer, length, HAL_MAX_DELAY) == HAL_OK;
+}
diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.h b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.h
index 9af4e50..085572e 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.h
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/GY_85_HAL.h
@@ -2,6 +2,7 @@
 #define __GY_85_HAL_H__
 
 #include "stm32f7xx_hal.h"   // change depending on MCU family
+#include <stdbool.h>
 #include <stdint.h>
 
 #define ADXL345_ADDR     (0x53 << 1)
@@ -18,8 +19,8 @@ typedef struct {
 } GY85_t;
 
 // Public API
-void GY85_Init(void);
-void GY85_Update(GY85_t *imu);   // reads all sensors and stores in struct
+bool GY85_Init(void);
+bool GY85_Update(GY85_t *imu);   // reads all sensors and stores in struct
 
 #endif
 
diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.cpp b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.cpp
index 2b15cc2..11e0b0c 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.cpp
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.cpp
@@ -1,6 +1,7 @@
-// gps_handler.cpp
-#include "gps_handler.h"
-#include <cmath>
+// gps_handler.cpp
+#include "gps_handler.h"
+#include <cmath>
+#include <cstdio>
 
 // UART handle for communication with GUI
 static UART_HandleTypeDef* gui_huart = NULL;
@@ -14,40 +15,46 @@ void GPS_Init(UART_HandleTypeDef* huart)
     memset(&current_gps, 0, sizeof(GPS_Data_t));
 }
 
-uint8_t GPS_IsDataValid(GPS_Data_t* gps_data)
-{
-    // Check if GPS data is within valid ranges
-    if (gps_data->latitude < -90.0 || gps_data->latitude > 90.0)
-        return 0;
+uint8_t GPS_IsDataValid(GPS_Data_t* gps_data)
+{
+    if (gps_data == NULL) {
+        return 0;
+    }
+
+    // Check if GPS data is within valid ranges
+    if (gps_data->latitude < -90.0 || gps_data->latitude > 90.0)
+        return 0;
     if (gps_data->longitude < -180.0 || gps_data->longitude > 180.0)
         return 0;
     if (gps_data->altitude < -1000.0 || gps_data->altitude > 10000.0) // -1km to 10km
         return 0;
     
-    return 1;
-}
-
-void GPS_ProcessData(GPS_Data_t* gps_data)
-{
-    // Validate GPS data
-    if (!GPS_IsDataValid(gps_data)) {
-        return;
-    }
-    
-    // Update current GPS data
-    memcpy(&current_gps, gps_data, sizeof(GPS_Data_t));
-    current_gps.timestamp = HAL_GetTick();
-    
-    // Send to GUI
-    GPS_SendToGUI(&current_gps);
-}
-
-void GPS_SendToGUI(GPS_Data_t* gps_data)
-{
-    if (gui_huart == NULL) return;
-    
-    // Create packet: "GPS:lat,lon,alt\r\n"
-    char buffer[64];
+    return 1;
+}
+
+bool GPS_ProcessData(GPS_Data_t* gps_data)
+{
+    // Validate GPS data
+    if (!GPS_IsDataValid(gps_data)) {
+        return false;
+    }
+    
+    // Update current GPS data
+    memcpy(&current_gps, gps_data, sizeof(GPS_Data_t));
+    current_gps.timestamp = HAL_GetTick();
+    
+    // Send to GUI
+    return GPS_SendToGUI(&current_gps);
+}
+
+bool GPS_SendToGUI(GPS_Data_t* gps_data)
+{
+    if (gui_huart == NULL || gps_data == NULL) {
+        return false;
+    }
+    
+    // Create packet: "GPS:lat,lon,alt\r\n"
+    char buffer[64];
     
     // Convert double and float to string with high precision
     int len = snprintf(buffer, sizeof(buffer), "GPS:%.8f,%.8f,%.2f\r\n",
@@ -55,19 +62,23 @@ void GPS_SendToGUI(GPS_Data_t* gps_data)
                       gps_data->longitude,
                       gps_data->altitude);
     
-    if (len > 0 && len < (int)sizeof(buffer)) {
-        // Send via UART3 to GUI
-        HAL_UART_Transmit(gui_huart, (uint8_t*)buffer, len, 1000);
-    }
-}
-
-// Alternative binary protocol version (more efficient)
-void GPS_SendBinaryToGUI(GPS_Data_t* gps_data)
-{
-    if (gui_huart == NULL) return;
-    
-    // Binary packet structure:
-    // [Header 4 bytes][Latitude 8 bytes][Longitude 8 bytes][Altitude 4 bytes][Pitch 4 bytes][CRC 2 bytes]
+    if (len <= 0 || len >= (int)sizeof(buffer)) {
+        return false;
+    }
+
+    // Send via UART3 to GUI
+    return HAL_UART_Transmit(gui_huart, (uint8_t*)buffer, len, 1000) == HAL_OK;
+}
+
+// Alternative binary protocol version (more efficient)
+bool GPS_SendBinaryToGUI(GPS_Data_t* gps_data)
+{
+    if (gui_huart == NULL || gps_data == NULL) {
+        return false;
+    }
+    
+    // Binary packet structure:
+    // [Header 4 bytes][Latitude 8 bytes][Longitude 8 bytes][Altitude 4 bytes][Pitch 4 bytes][CRC 2 bytes]
     
     uint8_t packet[30]; // 4 + 8 + 8 + 4 + 4 + 2 = 30 bytes
     uint16_t crc = 0;
@@ -99,10 +110,10 @@ void GPS_SendBinaryToGUI(GPS_Data_t* gps_data)
         packet[20 + i] = (alt_bits >> (24 - i*8)) & 0xFF;
     }
     
-    // Convert float altitude to bytes (big-endian)
-    uint32_t pitch_bits;
-    memcpy(&pitch_bits, &gps_data->pitch, sizeof(float));
-    for(int i = 0; i < 4; i++) {
+    // Convert float pitch to bytes (big-endian)
+    uint32_t pitch_bits;
+    memcpy(&pitch_bits, &gps_data->pitch, sizeof(float));
+    for(int i = 0; i < 4; i++) {
         packet[24 + i] = (pitch_bits >> (24 - i*8)) & 0xFF;
     }
 
@@ -112,8 +123,8 @@ void GPS_SendBinaryToGUI(GPS_Data_t* gps_data)
     }
     
     packet[28] = (crc >> 8) & 0xFF;
-    packet[29] = crc & 0xFF;
-    
-    // Send binary packet
-    CDC_Transmit_FS(packet, sizeof(packet));
-}
+    packet[29] = crc & 0xFF;
+    
+    // Send binary packet
+    return CDC_Transmit_FS(packet, sizeof(packet)) == USBD_OK;
+}
diff --git a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.h b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.h
index 0425698..73f7b02 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.h
+++ b/9_Firmware/9_1_Microcontroller/9_1_1_C_Cpp_Libraries/gps_handler.h
@@ -3,10 +3,11 @@
 #define GPS_HANDLER_H
 
 #include "main.h"
-#include "usb_device.h"
-#include "usbd_cdc_if.h"
-#include <stdint.h>
-#include <string.h>
+#include "usb_device.h"
+#include "usbd_cdc_if.h"
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -20,11 +21,11 @@ typedef struct {
     uint32_t timestamp;
 } GPS_Data_t;
 
-void GPS_Init(UART_HandleTypeDef* huart);
-void GPS_ProcessData(GPS_Data_t* gps_data);
-void GPS_SendToGUI(GPS_Data_t* gps_data);
-void GPS_SendBinaryToGUI(GPS_Data_t* gps_data);
-uint8_t GPS_IsDataValid(GPS_Data_t* gps_data);
+void GPS_Init(UART_HandleTypeDef* huart);
+bool GPS_ProcessData(GPS_Data_t* gps_data);
+bool GPS_SendToGUI(GPS_Data_t* gps_data);
+bool GPS_SendBinaryToGUI(GPS_Data_t* gps_data);
+uint8_t GPS_IsDataValid(GPS_Data_t* gps_data);
 
 #ifdef __cplusplus
 }
diff --git a/9_Firmware/9_1_Microcontroller/9_1_3_C_Cpp_Code/main.cpp b/9_Firmware/9_1_Microcontroller/9_1_3_C_Cpp_Code/main.cpp
index 0daa07d..ef1be6e 100644
--- a/9_Firmware/9_1_Microcontroller/9_1_3_C_Cpp_Code/main.cpp
+++ b/9_Firmware/9_1_Microcontroller/9_1_3_C_Cpp_Code/main.cpp
@@ -617,14 +617,13 @@ SystemError_t checkSystemHealth(void) {
         }
     }
 
-    // 4. Check IMU Communication
-    static uint32_t last_imu_check = 0;
-    if (HAL_GetTick() - last_imu_check > 10000) {
-        GY85_Update(&imu);
-        if (isnan(imu.ax) || isnan(imu.ay) || isnan(imu.az)) {
-            current_error = ERROR_IMU_COMM;
-        }
-        last_imu_check = HAL_GetTick();
+    // 4. Check IMU Communication
+    static uint32_t last_imu_check = 0;
+    if (HAL_GetTick() - last_imu_check > 10000) {
+        if (!GY85_Update(&imu)) {
+            current_error = ERROR_IMU_COMM;
+        }
+        last_imu_check = HAL_GetTick();
     }
 
     // 5. Check BMP180 Communication
@@ -1274,14 +1273,18 @@ int main(void)
   HAL_Delay(100);
   HAL_GPIO_WritePin(EN_P_3V3_FPGA_GPIO_Port,EN_P_3V3_FPGA_Pin,GPIO_PIN_SET);
   HAL_Delay(100);
-
-
-// Initialize module IMU
-  GY85_Init();
-  for(int i=0; i<10;i++){
-  GY85_Update(&imu);
-
-  ax = imu.ax;
+
+
+// Initialize module IMU
+  if (!GY85_Init()) {
+      Error_Handler();
+  }
+  for(int i=0; i<10;i++){
+  if (!GY85_Update(&imu)) {
+      Error_Handler();
+  }
+
+  ax = imu.ax;
   ay = imu.ay;
   az = imu.az;
   gx = -imu.gx;
@@ -1524,11 +1527,14 @@ int main(void)
   /**********wait for GUI start flag and Send Lat/Long/alt********/
   /***************************************************************/
 
-  GPS_Data_t gps_data;
-  // Binary packet structure:
-  // [Header 4 bytes][Latitude 8 bytes][Longitude 8 bytes][Altitude 4 bytes][CRC 2 bytes]
-  gps_data = {RADAR_Latitude, RADAR_Longitude, RADAR_Altitude, Pitch_Sensor, HAL_GetTick()};
-  GPS_SendBinaryToGUI(&gps_data);
+  GPS_Data_t gps_data;
+  // Binary packet structure:
+  // [Header 4 bytes][Latitude 8 bytes][Longitude 8 bytes][Altitude 4 bytes][Pitch 4 bytes][CRC 2 bytes]
+  gps_data = {RADAR_Latitude, RADAR_Longitude, RADAR_Altitude, Pitch_Sensor, HAL_GetTick()};
+  if (!GPS_SendBinaryToGUI(&gps_data)) {
+      const uint8_t gps_send_error[] = "GPS binary send failed\r\n";
+      HAL_UART_Transmit(&huart3, (uint8_t*)gps_send_error, sizeof(gps_send_error) - 1, 1000);
+  }
 
   // Check if start flag was received and settings are ready
   do{
diff --git a/9_Firmware/9_3_GUI/GUI_V5.py b/9_Firmware/9_3_GUI/GUI_V5.py
index 336a143..972e6ae 100644
--- a/9_Firmware/9_3_GUI/GUI_V5.py
+++ b/9_Firmware/9_3_GUI/GUI_V5.py
@@ -47,10 +47,23 @@ DARK_ACCENT = "#3c3f41"
 DARK_HIGHLIGHT = "#4e5254"
 DARK_BORDER = "#555555"
 DARK_TEXT = "#cccccc"
-DARK_BUTTON = "#3c3f41"
-DARK_BUTTON_HOVER = "#4e5254"
-DARK_TREEVIEW = "#3c3f41"
-DARK_TREEVIEW_ALT = "#404040"
+DARK_BUTTON = "#3c3f41"
+DARK_BUTTON_HOVER = "#4e5254"
+DARK_TREEVIEW = "#3c3f41"
+DARK_TREEVIEW_ALT = "#404040"
+
+RADAR_SETTINGS_LIMITS = {
+    'system_frequency': (1e9, 100e9),
+    'chirp_duration_1': (1e-6, 1000e-6),
+    'chirp_duration_2': (0.1e-6, 10e-6),
+    'chirps_per_position': (1, 256),
+    'freq_min': (1e6, 100e6),
+    'freq_max': (1e6, 100e6),
+    'prf1': (100, 10000),
+    'prf2': (100, 10000),
+    'max_distance': (100, 100000),
+    'map_size': (1000, 200000),
+}
 
 @dataclass
 class RadarTarget:
@@ -1125,10 +1138,10 @@ class RadarGUI:
         self.map_info_label = ttk.Label(info_frame, text="No GPS data received yet", font=('Arial', 10))
         self.map_info_label.pack()
     
-    def setup_settings_tab(self):
-        """Setup the settings tab with additional chirp durations and map size"""
-        settings_frame = ttk.Frame(self.tab_settings)
-        settings_frame.pack(fill='both', expand=True, padx=10, pady=10)
+    def setup_settings_tab(self):
+        """Setup the settings tab with additional chirp durations and map size"""
+        settings_frame = ttk.Frame(self.tab_settings)
+        settings_frame.pack(fill='both', expand=True, padx=10, pady=10)
         
         entries = [
             ('System Frequency (Hz):', 'system_frequency', 10e9),
@@ -1153,8 +1166,40 @@ class RadarGUI:
             entry.grid(row=i, column=1, padx=5, pady=5)
             self.settings_vars[attr] = var
         
-        ttk.Button(settings_frame, text="Apply Settings", 
-                  command=self.apply_settings).grid(row=len(entries), column=0, columnspan=2, pady=10)
+        ttk.Button(settings_frame, text="Apply Settings", 
+                  command=self.apply_settings).grid(row=len(entries), column=0, columnspan=2, pady=10)
+
+    def _parse_settings_from_form(self):
+        """Read settings from the UI and return a validated RadarSettings instance."""
+        parsed_settings = RadarSettings(
+            system_frequency=float(self.settings_vars['system_frequency'].get()),
+            chirp_duration_1=float(self.settings_vars['chirp_duration_1'].get()),
+            chirp_duration_2=float(self.settings_vars['chirp_duration_2'].get()),
+            chirps_per_position=int(self.settings_vars['chirps_per_position'].get()),
+            freq_min=float(self.settings_vars['freq_min'].get()),
+            freq_max=float(self.settings_vars['freq_max'].get()),
+            prf1=float(self.settings_vars['prf1'].get()),
+            prf2=float(self.settings_vars['prf2'].get()),
+            max_distance=float(self.settings_vars['max_distance'].get()),
+            map_size=float(self.settings_vars['map_size'].get()),
+        )
+
+        self._validate_radar_settings(parsed_settings)
+        return parsed_settings
+
+    def _validate_radar_settings(self, settings):
+        """Mirror the firmware-side range checks before sending settings to STM32."""
+        for field_name, (minimum, maximum) in RADAR_SETTINGS_LIMITS.items():
+            value = getattr(settings, field_name)
+            if value < minimum or value > maximum:
+                raise ValueError(
+                    f"{field_name} must be between {minimum:g} and {maximum:g}."
+                )
+
+        if settings.freq_max <= settings.freq_min:
+            raise ValueError("freq_max must be greater than freq_min.")
+
+        return True
     
     def apply_pitch_correction(self, raw_elevation, pitch_angle):
         """
@@ -1262,29 +1307,28 @@ class RadarGUI:
         
         logging.info("Radar system stopped")
     
-    def apply_settings(self):
-        """Step 13: Apply and send radar settings via USB"""
-        try:
-            self.settings.system_frequency = float(self.settings_vars['system_frequency'].get())
-            self.settings.chirp_duration_1 = float(self.settings_vars['chirp_duration_1'].get())
-            self.settings.chirp_duration_2 = float(self.settings_vars['chirp_duration_2'].get())
-            self.settings.chirps_per_position = int(self.settings_vars['chirps_per_position'].get())
-            self.settings.freq_min = float(self.settings_vars['freq_min'].get())
-            self.settings.freq_max = float(self.settings_vars['freq_max'].get())
-            self.settings.prf1 = float(self.settings_vars['prf1'].get())
-            self.settings.prf2 = float(self.settings_vars['prf2'].get())
-            self.settings.max_distance = float(self.settings_vars['max_distance'].get())
-            self.settings.map_size = float(self.settings_vars['map_size'].get())
-            self.google_maps_api_key = self.settings_vars['google_maps_api_key'].get()
-            
-            if self.stm32_usb_interface.is_open:
-                self.stm32_usb_interface.send_settings(self.settings)
-            
-            messagebox.showinfo("Success", "Settings applied and sent to STM32 via USB")
-            logging.info("Radar settings applied via USB")
-            
-        except ValueError as e:
-            messagebox.showerror("Error", f"Invalid setting value: {e}")
+    def apply_settings(self):
+        """Step 13: Apply and send radar settings via USB"""
+        try:
+            parsed_settings = self._parse_settings_from_form()
+            self.google_maps_api_key = self.settings_vars['google_maps_api_key'].get()
+
+            self.settings = parsed_settings
+
+            if self.stm32_usb_interface.is_open:
+                if not self.stm32_usb_interface.send_settings(self.settings):
+                    messagebox.showerror("Error", "Failed to send settings to STM32 via USB")
+                    logging.error("Radar settings validation passed, but USB send failed")
+                    return
+
+                messagebox.showinfo("Success", "Settings applied and sent to STM32 via USB")
+                logging.info("Radar settings applied and sent via USB")
+            else:
+                messagebox.showinfo("Success", "Settings applied locally")
+                logging.info("Radar settings applied locally; STM32 USB is not connected")
+
+        except ValueError as e:
+            messagebox.showerror("Error", f"Invalid setting value: {e}")
     
     def start_background_threads(self):
         """Start background data processing threads"""
diff --git a/Licence b/Licence
new file mode 100644
index 0000000..53167e5
--- /dev/null
+++ b/Licence
@@ -0,0 +1,154 @@
+CERN Open Hardware Licence Version 2 - Permissive
+
+Preamble
+
+CERN has developed this licence to promote collaboration among
+hardware designers and to provide a legal tool for the dissemination
+of hardware designs. The CERN Open Hardware Licence Version 2 is
+available in two variants: Weakly Reciprocal (CERN-OHL-W) and
+Permissive (CERN-OHL-P). The CERN-OHL-P is for you if you want to
+maximise the ability of people to use your hardware design
+including for use in commercial applications with a minimum of
+obligations. It is a continuation of the CERN Open Hardware Licence
+version 1 (but with a new structure) and is focused more narrowly
+on the design itself and what you must do to give proper credit and
+to allow others to build and modify the design.
+
+Please see the CERN-OHL version 2 family page (www.ohwr.org/cernohl)
+for more information.
+
+Terms and conditions
+
+1. Definitions
+
+In this Licence, the following terms have the following meanings:
+
+“Additive” means something you add to the Design that was not part
+of it when it was first published by the Licensor.
+
+“Design” means the design documentation for the hardware that is
+licensed under this Licence, in any format or medium. It may
+include both the Hardware Description and the Modifications.
+
+“Documentation” means all the materials that are provided by the
+Licensor or any Contributor to describe the Design, including
+schematics, netlists, PCB layout files, bills of materials,
+drawings, specifications, and the like, and also includes the
+Modifications.
+
+“Hardware” means any physical device that embodies the Design or
+any part thereof, in any form.
+
+“Hardware Description” means the files that specify the Hardware in
+a form that can be read by a computer and that, when used
+appropriately, can be used to fabricate Hardware, for example in
+whole or in part.
+
+“Licence” means this licence (the CERN-OHL-P).
+
+“Licensor” means the person or entity that first publishes the
+Design under the terms of this Licence.
+
+“Modification” means any change to the Design, including changes to
+the Hardware Description.
+
+“Product” means either an unchanged Design or a Design with
+Modifications, that is offered for sale, or otherwise made
+available for commercial use, whether as Hardware or in other forms.
+
+“Source” means the format of the Design that is preferred for
+making Modifications, including all the files that are provided for
+that purpose.
+
+“You” means any person or entity that exercises any right under
+this Licence.
+
+2. What this Licence covers
+
+The Licensor grants you a worldwide, royalty-free, non-exclusive,
+perpetual licence to:
+
+a) use the Design and any associated Documentation,
+b) make Modifications,
+c) communicate the Design and any Documentation, including by
+   making it available for copying and modification,
+d) manufacture and distribute Hardware that implements the Design
+   or any part thereof,
+e) sell Products, and
+f) otherwise deal in the Design or any part thereof,
+
+all in each case subject to the conditions set out in this Licence.
+
+3. Conditions
+
+3.1. Availability of Source
+
+The Design and any Documentation that is made available under this
+Licence must be made available in Source format. If the Design is
+available in a format that is not Source, you must also make a
+version of the Design in Source format available, and you must
+inform others of how to obtain it.
+
+3.2. Retention of copyright and other notices
+
+You must retain all copyright and other notices that appear in the
+Design or Documentation.
+
+3.3. Notice of Modifications
+
+If you make Modifications, you must include a notice in any
+Distribution of the Design or Documentation, stating that
+Modifications have been made, by whom, and in what they consist.
+
+3.4. Distribution of Modifications
+
+If you distribute any Design or Documentation, whether unchanged or
+with Modifications, you must distribute it under this Licence, and
+you must inform the recipient that the Design or Documentation is
+licensed under this Licence.
+
+3.5. No implicit approval
+
+The Licensor shall not be taken to have approved any Modifications
+unless the Licessor expressly approves them in writing.
+
+4. Disclaimer of warranty
+
+THE DESIGN AND ANY DOCUMENTATION IS PROVIDED "AS IS" AND THE
+LICENSOR MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
+NON-INFRINGEMENT, TITLE, AND FITNESS FOR A PARTICULAR PURPOSE. THE
+DESIGN MAY CONTAIN DESIGN DEFECTS OR ERRORS THAT MAKE IT
+UNSUITABLE FOR USE IN CERTAIN APPLICATIONS. THE ENTIRE RISK AS TO
+ITS QUALITY AND PERFORMANCE REMAINS WITH YOU.
+
+5. Limitation of liability
+
+TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT WILL THE LICENSOR
+BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION
+LOST PROFITS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR ANY
+OTHER LOSSES ARISING OUT OF THE USE OF THE DESIGN OR ANY
+DOCUMENTATION, HOWEVER CAUSED, WHETHER UNDER THEORY OF CONTRACT,
+TORT (INCLUDING NEGLIGENCE), PRODUCTS LIABILITY, OR OTHERWISE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+6. Termination
+
+This Licence is perpetual except that if you fail to comply with
+its terms, your rights under this Licence will terminate immediately.
+If you bring or defend any litigation or other claim alleging that
+the Design or any part thereof infringes any intellectual property
+right, all your rights under this Licence granted by the Licensor
+will terminate forty-five days after you bring or defend such claim.
+
+7. General
+
+This Licence shall be governed by the laws of the country of the
+Licensor, without reference to its conflict of laws provisions.
+If any part of this Licence is held to be invalid or unenforceable,
+the remaining parts shall remain in full force and effect.
+
+---------------------------------------------------------------------
+
+CERN-OHL-P is a variant of the CERN-OHL family. For more information
+see www.ohwr.org/cernohl.
diff --git a/README.md b/README.md
index 7bb7ecd..86d2147 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # AERIS-10: Open Source Pulse Linear Frequency Modulated Phased Array Radar
 
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Hardware: CERN-OHL-P](https://img.shields.io/badge/Hardware-CERN--OHL--P-blue.svg)](https://ohwr.org/cern_ohl_p_v2.txt)
+[![Software: MIT](https://img.shields.io/badge/Software-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Status: Alpha](https://img.shields.io/badge/Status-Alpha-orange)](https://github.com/NawfalMotii79/PLFM_RADAR)
 [![Frequency: 10.5GHz](https://img.shields.io/badge/Frequency-10.5GHz-blue)](https://github.com/NawfalMotii79/PLFM_RADAR))
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/NawfalMotii79/PLFM_RADAR/pulls)
@@ -142,3 +143,41 @@ The AERIS-10 main sub-systems are:
 4. **Antenna**: Choose appropriate array for your version
 5. **Enclosure**: 3D printable files in `/10_docs/Hardware/Enclosure`
 
+## 📜 License
+
+This project is open-source but uses **different licenses for hardware and software** to ensure proper legal coverage.
+
+### Hardware Documentation
+The hardware design files—including:
+- Schematics and PCB layouts (in `/4_Schematics and Boards Layout`)
+- Bill of Materials (BOM) files
+- Gerber files and manufacturing outputs
+- Mechanical drawings and enclosure designs
+
+are licensed under the **CERN Open Hardware Licence Version 2 – Permissive (CERN-OHL-P)** .
+
+This is a hardware-specific license that:
+- ✅ Clearly defines "Hardware," "Documentation," and "Products"
+- ✅ Includes explicit patent protection for contributors and users
+- ✅ Provides stronger liability limitations (important for high-power RF)
+- ✅ Aligns with professional open-hardware standards (CERN, OSHWA)
+
+You may use, modify, and sell products based on these designs, provided you:
+- Maintain the original copyright notices
+- Distribute any modified designs under the same license
+- Make your modifications available in Source format
+
+### Software and Firmware
+The software components—including:
+- FPGA code (VHDL/Verilog in `/9_Firmware`)
+- Microcontroller firmware (STM32)
+- Python GUI and utilities
+
+remain under the **MIT License** for maximum flexibility.
+
+### Full License Texts
+- The complete CERN-OHL-P license text is in the `LICENSE` file
+- MIT license terms apply to software where not otherwise specified
+
+### Why This Change?
+Originally, the entire project used the MIT license. The community (special thanks to [GitHub Username]!) pointed out that MIT lacks legal protections needed for physical hardware. The switch to CERN-OHL-P ensures the project is properly protected while maintaining the same permissive spirit.