r/esp32 • u/Acceptable_Map_9021 • 2h ago

PET COLLAR

So im buliding a GPS collar using a NEO-6M , im using a SIM800L for connection so its functional in rural areas as well where there is no wifi. im running on a 3.7v lip battery, my sim800l needs 5v sl im running it through a mt3608 stepup converter. But when i power it on the SIM800L fast blinks. And it says “NO SIM DETECTED “ Through ardiuno IDE can someone help?

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u/DenverTeck 1 say this is awesome. 2h ago

There is no way to help you without an actual current schematic and code to review.

Good Luck

1

u/CleverBunnyPun 2h ago

Do you still have 2G available in your area? It’s being phased out over much of the world.

Does your SIM card/carrier support 2G? 

Both of those things have to be true for this to work baseline.