![]() I use the USB connection to communicate with the module. Here, VBATT is 4.0V, and R2 and R3 are necessary to keep the RX channel below 2.8V. The original, non-firmware upgrading wiring to an Arduino Nano: How can I upgrade its firmware or make it to connect to my network some other way? The situation is the same with the Linux command line firmware updater. ![]() ![]() The updater is still in its "Waiting" phase. VCC + (through a 1500 ♟ capacitor, parallel)Īfter I started the upgrade process, powered on the device, and grounded PWRKEY, the STATUS pin went dark but nothing happens. I downloded the proper upgrade tool along with the correctly sized firmware and with a CP2102 USB-to-UART converter I wanted to start the process.ĬP2102 works both under Linux and Windows, I tried it with a GPS module. in EGSM_MODE) and that's why I want to upgrade its firmware. My SIM800C, feeded directly from a 4.0V Li-ion battery (or once, from a Delta bench PSU) through a 1500 ♟ capacitor, instantly turns off when it wants to join to my 2G+ European network (e.g.
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