Unable to detect SIM card while running on battery

pulkin / micropython

MicroPython implementation on Ai-Thinker GPRS module A9 (RDA8955)

https://micropython.org

MIT License

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Unable to detect SIM card while running on battery #121

Open techiesms opened 1 year ago

techiesms commented 1 year ago

I tried writing script that send SMS that contains GPS coordinates in it. The script works fine when I test with USB to TTL Programmer attached with the A9G Board. But when I remove that and try to power A9G board with battery or direct USB it doesn't work at all. It say's SIM not inserted

can anyone tell me the exact problem ?

machiobrian commented 8 months ago

Have you checked the power drawn while establishing a GSM connection?

machiobrian commented 8 months ago

RESOURCE 1 https://github.com/Ai-Thinker-Open/GPRS_C_SDK/issues/421

enekux commented 6 months ago

Hi, I am having the same problem as you @techiesms. Did you ever found a solution to this problem? Thanks and regards!

enekux commented 4 months ago

Hi @techiesms did you ever find a solution to this? Thanks