Hello, I have an arduino UNO and a SIM800C, the AT commands work very well, but it does not connect to the network when I request the network signal with "AT + CSQ" it says "AT + CSQ: 0, 0 "
Connection:
VCC -> VDC 5V
GND -> GND
PWK (PWR) -> GND
TX -> D3
RX -> D2
Thank you for your help in advance,
cordially
You have a idea ?
?
I repeat I test with a 5V arduino power supply and with a 3.7V 4A battery
The NET LED flashes every 1s, I put the sim card on the right side, I'm in a good place for the GSM connection,
I tested several antennas:
I even try to put a divider bridge on the input D3 (RX) of the arduino to have 3.3V.
My connections:
VCC -> VDC 5V
GND -> GND
PWK (PWR) -> GND
TX -> D3
RX -> D2
My module:
The documentation I have to look at:
DOC SIM800C
Thank you
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