@tcccorp 1. To set the local SMS center: AT+CSCA=""+ Press Enter, return OK. For details, consult your carrier.
2. AT+CMGF=1: Set the SMS mode to TEXT.
3.AT+CMGS="phone number"< enter >, set the receiver phone number, then return: ">",
Send desired content, such as "Send Massage Test!" You don't need a carriage return at the end,
After editing the SMS message, send the message in hexadecimal format 1A (1A is the key value of CTRL+Z, which tells the module to send the message.
You can also send 1B, that is, "ESC" to cancel the operation.) After the sending is successful, the module returns +CMGS: 15 to confirm the successful sending.