GSM (data/SMS) completely transparent RS-232 module
Product Description
GSM (data/SMS) completely transparent RS-232 module
GSM module briefly requirements:
Main module (center) is RS-232 connected with PC, PC send data to multiple subordinate module (extension) by main module(center) , PC can also receive data from subordinate module (extension) by main module (center).
GSM module is like a postman, receive letters from a serial port, and then through the two GSM module wireless transceiver, send to other serial port, all are transparent transmission.
How to use it:
Module serial command:
1) main module (center) : PC connected to the main module (center), through the main module (center) to send data to multiple subordinate module (extension), format as: subordinate the module (extension) telephone number # data
2) subordinate module (extension) : PC connected subordinate module (extension), program main module (center) telephone number inside the subordinate module (extension), format as: subordinate module (extension) telephone number * main module (center) telephone number
Program main module (center) telephone number inside the subordinate module (extension), you can also use mobile phones directly send SMS to subordinate module (extension) to program it, format as: 123456 # telephone number (0-15) #
Modified password: 123456 # new password (1-6) #
Define baud rate: 19200 bps
A start bit (0), 8 bits of data bits (low LSB before, high MSB last), a stop bit (1)
Note: send data line is high level in the spare time
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