I have echo turned on (rs485 with echo) and using RTU coding. Now not the whole echo gets ignored. The crc of the master-request is taken as slave response.
The problem is in the class
ModbusRTUTransport:
if (echo) { readEcho(len); }
there should be 'readEcho(len +2);'
+2 for the 2 crc bytes... the same as in the class ModbusBINTransport. There this is already fixed...
I fixed this locally and it works great!
steveohara
commented
7 years ago
I have echo turned on (rs485 with echo) and using RTU coding. Now not the whole echo gets ignored. The crc of the master-request is taken as slave response.
The problem is in the class ModbusRTUTransport:
if (echo) { readEcho(len); }there should be 'readEcho(len +2);' +2 for the 2 crc bytes... the same as in the class ModbusBINTransport. There this is already fixed... I fixed this locally and it works great!