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A7682E can work as a Modbus TCP slave, but it requires an external microcontroller to handle Modbus protocol logic. The best TCP mode for Modbus TCP is Server Mode (AT+CIPSERVER=1,502). If you have Modbus RTU devices, you can use transparent mode to convert RTU to TCP.
A7682E can work as a Modbus TCP slave, but it requires an external microcontroller to handle Modbus protocol logic. The best TCP mode for Modbus TCP is Server Mode (AT+CIPSERVER=1,502). If you have Modbus RTU devices, you can use transparent mode to convert RTU to TCP.
thanks for reply. yes i use microcontroller to handle modbus protocol. is server mode can used for modbus slave? in my project, there is a web server that send me modbus commands like holding register and write register periodically. in this situation which mode is better client or server?
I looked the at module's commands document but there isnt a command like at+cipserver. there is at+serverstart. i use this command. it returns me "OK" but i cannot connect with modbus poll. i get server ip address using at+ipaddr command. socket is 502. what is wrong?
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