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AT Command Wiki
Problem: software serial library does not recieve data well at baud rates above 9600.
The following procedure can be used to change the baud rate on each boot to a more suitable rate for software serial.
1 - Connect with 115200 baud
2 - Send "AT+UART_CUR=9600,8,1,0,0\r\n"
3 - Wait for "OK" response
4 - Change baud to 9600
5 - Wait some time (500ms?)
6 - Do not reset module as it will revert to defualt baud rate!
Once a reliable system has been established, change the default baud rate