Hello,
Installing FMM650 in low-usage car (bench-tested OK).
Switzerland: 2G shutdown, Sunrise IoT SIM → 4G/LTE Cat M1 only.
Sleep mode set to Deep Sleep.
Observed when stopped:
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Current: ~20mA average, spikes ~30mA
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GSM LED: 6 short flashes with 2s pause in between and 7th 1 long flash (and this sequence repeats)
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GPS LED: Completely off
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No server connection
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No USB connection
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GPS Fix available
Firmware: 03.01.00.Rev.14 (already tried multiple config reset).
Datasheet says Deep Sleep <4mA (GSM off), but with GPS off and ~20mA draw, it seems stuck in Online Deep Sleep.
Known issue on Cat M1-only networks (no 2G fallback)? Any way to get lower consumption?
Thanks for any help!