I had to change the value in the code: from ----------------- registerRequest(INTERFACE_ID, UBA_ID, 0x18, 32 ); //This one reads 0x18 UBAMonitorFast from the boiler. ----------------- to ----------------- registerRequest(INTERFACE_ID, UBA_ID, 0x18, 17 ); //This one reads 0x18 UBAMonitorFast from the ...

Did you mean the EMSBusSimpleRegisterReadRequest sketch? Request with length 17: EMS bus request started. Do request Received a dataframe! Correct frametype received. -----Datagram----- BYTES=24 HEX: 0x8 0xB 0x18 0x0 0x26 0x1 0x7C 0x64 0x23 0x9 0x1 0x7 0x0 0x83 0x0 0x7D 0x0 0x1 0x4B 0x0 0x93 0x64 ...

Did you capture a longer datagram for 0x18 at the start? Yes! Captured at start: -----Datagram----- BYTES=30 HEX: 0x8 0x9 0x18 0x0 0xD 0x1 0x77 0x64 0x0 0x0 0x0 0x0 0x0 0x83 0x0 0x7D 0x0 0x1 0x4D 0x0 0x1 0xD 0x30 0x48 0x0 0x0 0xFF 0xA3 0x0 0x0 -----End of Datagram----- Captured whole day, two to ...

I have already thought so, so my question, if the board could be wrong?
But why does it work once at the start of the boiler?

Yes, the message 0x18 is displayed in the Serial Monitor with the serial dump sketch: ----------------snip------------------ EMS bus dump started. Received datagram. -----Datagram----- BYTES=17 HEX: 0x8 0x0 0x18 0x1B 0x0 0x0 0x0 0x0 0x0 0xF 0x7B 0x24 0x0 0x0 0x40 0x0 0x0 -----End of Datagram ...

Hallo Kees, i own a Buderus GB212 with no RC35, RC20 or something else. The boiler is only controlled by an external 0-10V signal. The output on Arduino Mega Serial Monitor of EMSBusSimpleRegisterReadRequest and EMSBusDumpToSerial works fine, but with EMSBusReceiveExample i get no values. Only when ...