Hi guys, i connect my arduino YUN to a TTL to RS232 adapter and then use a USB to RS232 adapter to PC. The code is using: https://code.google.com/p/simple-modbus/ #include <SoftwareSerial.h> SoftwareSerial mySerial(10, 11); #include <SimpleModbusSlave.h> /* This example code will receive the adc…

Modbus slave timeout error

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