How to flash the “DFUTarg” bootloader to RuuviTag after assembly. Everything that can be opensourced is freely available. Please turn closed captions on for explanation of steps.

The process:
– cut SB9 jumper
– switch power off
– insert RuuviTag in place
– press gently so that the connections to pogo pins are good
– switch power on
– once the LED stays lit testing is done
– launch nRF Master Control Panel and its RSSI graph
– press SCAN, graphs start to run
– If you see device named DfuTarg and its RSSI graph is moving, the device is working!
– switch power off
– insert into RuuviTag ESD bag

For more information, please see


Leave a Reply

Your email address will not be published. Required fields are marked *