Steps for Updating the Firmware {#firmware_update}

For updating the Firmware of Sense_Pi unit one must have the repository setup on their computer. \n Then follow these steps:

Go to the folder "nrf5x-firmware > applications > sense_pir " and open the terminal there.
Use command 'make release' to create the .zip folder containing all the .hex files for the firmware update. \n It will also create a .hex file which can be used for directly flashing the firmware to the Sense_pi unit using a Pogo Connector.
Transfer this .zip file to your mobile device.
Download the "nRF Connect for Mobile" App (by Nordic Semiconductor ASA) for flashing the firmware to the Sense_Pi unit.

Steps for using nRF Connect App

You will have to go to the Bootloader mode. Open the Sense_Pi unit and disconnect the power connector. \n Now keep the switch pressed and connect the power connector. You will see the LED blinking in a Green-Red pattern. \n You are in Bootloader mode now.
Open the app. Keep your phone's bluetooth On.
Use "Scan" option in the app and connect to the SensiPi unit shown as "SensePi Update".
You will see a small, circular "DFU" icon on the top right corner. Press that.
Now select the "Distribution packet (ZIP)" option.
Browse to the location where you have the "sense_pir_xxx_yyy.zip" file. Select the file and wait till the firmware is updated.
The Sense_Pi unit will now go to "Sensing Mode" after this. \n You can put back the cover and use it now.