![]() On UART connector Pin 1 is on the side of GPIO CON3, and Pin 4 - on the side of GPIO CON4. Connect the wires of the Serial cable to the UART connector (the pins on the side of the SIM card connector) as follows: Note!!! ![]() ![]() We also need OLIMEXINO-NANO-BAT module and a charged battery. In this example we use a cable called USB-Serial-Cable-F. You would need to establish a serial connection. These are hosted as zip archives here at GitHub. How to update the firmware of OLIMEXINO-NANO-GSM (the board has SIM800H)? You would need to download a tool used to upload to the module and also appropriate firmware version. ![]() Can you provide correct link to SIMCOM series download. ![]() Sim800 firmware flash tool, sim800 firmware update. ![]()
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