GSM doesn't turn on or do not detect SIM Card

IOT-MCU / ESP-12S-A9-A9G-GPRS-Node-v1.0

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GSM doesn't turn on or do not detect SIM Card #18

Closed ayazurrehman786 closed 3 years ago

ayazurrehman786 commented 3 years ago

I m powering the board by USB cable from PC, the CHG led is on, but unable to power on the GSM module. The STA and NET LED is not turned on and SIM card is not detected.