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The problem is that, this device is already a production made product and i don't have debug USB connector to upgrade firmware of the module?
Do you know if it possible to upgrade firmware of the module through my micro controller UART connection?
When the module does not register (AT+CREG...
I have tried sim cards from two different operators and nothing helps...
Very strange thing to me is that, sometimes module manage to register to the network. Yesterday it could connect in any way but today the module is connecting pretty normal few times but then again it did not manage to...
Hello,
I have problems with ma SIM808 GSM/GPS module. I have a custom made PCB where i am using SIM808 module to send some data to my web server.
I have produced around 100 pcs of PCB.
On a few pieces of PCB i have a problem that after some period of time (6 months - 1 year), the module can...
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