SIM800 RTU
RTU Firmware
- UART1 - for data transfer and parameter setting
- UART2 - for standard AT command communication
- The baud rate is 115200, 8bit data, 1bit stop, no parity
- NETLIGHT PIN - is used to indicate the network registration status
- STATUS PIN - is used for power on indication, high level is for power on
To set commands, first enter into commands mode by +++, confirm password by AT+DTUW=900,12345678; after setup, save configuration by AT+DTUW=999; exit commands mode and enter into data mode by ATO
| Commands | read | write |
|---|---|---|
| password | - | AT+DTUW=900,12345678 |
| APN | AT+DTUR=1 | AT+DTUW=1,CMNET |
| Link Status | - | AT+DTUS |
| IP address | AT+DTUR=102 | AT+DTUW=102, 167.88.114.101 |
| Port | AT+DTUW=103 | AT+DTUW=103,9999 |
| Save | AT+DTUW=999 | |
| exit commands mode | ATO | |
| Fail times | AT+DTUW=921,3 | |
| Restart Module if still fail | AT+DTUW=922,1 | |
| enter into commands mode | +++ |
SMS
The format is: $SMS number # SMS content SMS$ (Do not add any characters after SMS$)
E.g: $SMS10086#Test SMS SMS$
When a text message is received, it will be output through the serial port in the same format as the text message sent:
$SMS number # SMS content SMS$
The content of the SMS is GBK code. On Chinese computers, the default is GBK code.
Write the MCU program can be written directly like this:
Sprint(buffer,"$SMS%s#%sSMS$", "10086", "Test SMS");