I have used these units in the past and had no problems updating the firmware via mobile app to use with Cayenne/LPP rather than Laird proprietary payload (f/w 4.5 for obvious duty cycle benefits) . However, had a few units recently and during f/w update process stopped with error -
Updating bootloader - xxx of 1137 Error Task 8 failed: No response to opcode 0x04 OK
It makes the unit unusable - some units seem to respond by pressing down the BLE button for 30 sec and reset but others do not.
Anybody seen this or have an idea how to fix? Laird support contacted but no response.