ble_sensor_adv

BLE advertising sensor node. Using a modified Adafruit ItsyBitsy nRF52840 with MS8607 sensor and 2.7µA deep sleep current

Modifications to the ItsyBitsy nRF52840

• Dotstar LED removed
• LDO regulator removed
• Sensor MS8607 is powered via GPIO pin

Software Optimizations

• Sensor data is transmitted as BLE advertising broadcast
• no permanent connection to central with notify any more
• delay() before measurement und BLE activation uses 2,7 µA (!)
• Soft reset (NVIC_SystemReset();) after measurement and advertising. Otherwise the Nordic Softmodem stays active and consumes 274 µA!