The described procedure is for synchronizing beacons with the Cloud, not for reseting them.
If you really want to reset device you have to press and hold side button and then press main button 8 times. However this function was introduced in version 0.1.0 so you have to perform sync first to upgrade firmware (which also reboots the device):
- Press side button once so one of the side LEDs will light up. This will stop current app which may be interfering with proper synchronization (e.g. turning on airplane mode).
- Press and hold side button and then press main button until side LEDs will start blinking one by one. This should start after about 10s.
Make sure beacon is charged (charge it for at least 2h), otherwise there might not be enough power to start modem and forced sync will end up so fast that LEDs blinking won’t be noticeable. Also make sure that you are in area with good LTE-M coverage. Note that pressing main button increases advertising power and decreases interval for 10s making device easier to detect.
LTE beacons always advertise connectivity packet that allows WebIDE to connect to them. You cannot switch it off. If you cannot detect your devices it might mean that one or more following things are happening:
- Device battery is empty
- Device has hardware failure
- Problems with BLE scanning device
Spontaneous hardware failure is rather unlikely in all 6 devices in a row, unless it is caused by common external damaging factor. More likely are situations 1 and 3.