Firmware upgrade

Prerequisities

• ZIP file containing new firmware
• Application from Android Google Play Store: nRF Toolbox for Bluetooth LE.

Steps

• Launch application nRF Toolbox, tap button labeled (UART) in "Utils services" section
• Wait until your sensor device is detected and listed, tap on the device name to connect
• NUS/UART console will launch
• Into the section of the consoled labeled "Text to send" insert the following: unlock apple pie
• Then click "Send"
• The device will enter unlocked status. Next type: dfu
• Then click "Send"
• The sensor device will be restarted into firmware loader mode.
• Go to the main menu of nRF Toolbox app (using left arrow button in left top corner) and click on the icon labeled "Device Firmware Update / DFU"
• Tap FILE->Select and select new firmware file - for example dfu_app.zip
• Tap DEVICE->Select and click on the device in list named "DFU"
• Tap on PROGRESS->Start and wait for the device to load new firmware.