Using Mooshimeter DMM-BLE-2X01A with HTC One (M7), Android v5.0.2.
Thanks for the advice about rebooting the phone after the firmware upgrade, seems to work now. I was getting very frustrated with the “Invalid Firmware” message… no matter how many times I reset or reloaded fast vs slow. That bit of advice should really be included with the meter, hope this can be fixed in a future update. Android users shouldn’t have to find a friend with an iPhone.