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5. Send a clear SMS command to clear the SMS from the GT-531 and it
can receive the next SMS.
The phone of transmitting SMS：886928766507
Date：20110422095531(2011/04/22/ 09:55:31)
Result
The SMS：Hello,GT-531!
Format Description:
Inquiring the SMS-531 whether has received the SMS
Byte 0
Byte 1
Command
Byte 2 ~ 3
Byte 4 ~ 5
Byte 6 ~ 7
Byte 0
Byte 1
Correct
Byte 2
response
Byte 3
Byte 4 ~ 5
Byte 0
Byte 1
Error response
Byte 2
Byte 3 ~ 4
Reading the phone number of the received SMS
Byte 0
Byte 1
Byte 2 ~ 3
Command
Byte 4 ~ 5
Byte 6 ~ 7
Byte 0
Byte 1
Correct
Byte 2
Response
Byte 3 ~ 22
Byte 23 ~ 24
The Modbus Address of the SMS-531
Function Code = 2
The address to indicate whether the SMS-531 has
received the SMS
Bit Count，1 bit
CRC-16 check code
The Modbus Address of the SMS-531
Function Code = 2
Byte Count，(The size of Data)
= 0, No SMS
= 1, Having received the SMS
CRC-16 check code
The Modbus Address of the SMS-531
= 0x82
Error Code
02: Error format
CRC-16 check code
The Modbus Address of the SMS-531
Function Code = 4
The data address of the sending phone number
Register Count (The inquired count of register. It is
fixed as 10(0x0A)
CRC-16 check code
The Modbus Address of the SMS-531
Function Code = 4
Byte Count
The sending phone number (ASCII coed, 0x00 is the
end char)
CRC-16 check code
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SMS-531 User's Manual v1.1
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