Added software reset

fw/Core/Inc/main.h

@@ -96,6 +96,7 @@ int8_t uart_enable_interrupts(void);
 #endif
 /* USER CODE BEGIN Private defines */
 #define MEASUREMENT_PERIOD_MS		600000
+#define RESET_MAGIC_NUMBER 			0xABCD
 
 extern uint16_t usart2_rx_message_index;
 extern uint16_t usart2_rx_message_len;

fw/Core/Src/main.c

@@ -89,7 +89,8 @@ enum
 	REGISTER_NUM_CO2_ALERT_LIMIT2 = 40005,
 	REGISTER_NUM_SCD4x_T_OFFSET = 40006,
 	REGISTER_NUM_MODBUS_ADDR = 40007,
-	REGISTER_NUM_BAUDRATE = 40008
+	REGISTER_NUM_BAUDRATE = 40008,
+	REGISTER_NUM_RESET_DEVICE = 40100
 } config_registers_numbers;
 
 enum
@@ -931,6 +932,14 @@ int8_t modbus_slave_callback(modbus_transaction_t *transaction)
 						sensor_config.baudrate_index = (uint16_t) (transaction->holding_registers[i]);
 						baudrate_changed = 1;
 						break;
+					case REGISTER_NUM_RESET_DEVICE:
+						if (transaction->holding_registers[i] == 0xABCD) {
+							/* software reset */
+							NVIC_SystemReset();
+						} else {
+							return MODBUS_ERROR_OUT_OF_BOUNDS;
+						}
+						break;
 					default:
 						return MODBUS_ERROR_FUNCTION_NOT_IMPLEMENTED;
 				}