Any one tested 1137B09SIM900M64_ST firmware? I installed here but cant use AT command, whats default baud rate for it? and where can we locate more doc about it?
======= EDIT =======
I solved here:
- We must write 1137B09SIM900M64_ST.cla file, not .rar or .zip
- After FW updated sim900 go to auto baud rate mode, use 38400 bps as baud rate to communicate, and send commands, using upper case: like ATI
- You can setup default baud rate using AT+IPR=19200