No problem for the delayed answer. It's still hobby. Sorry for not beeing specific enough in my question. What I mean is that for both variables curImpTemp and errCode the same MSB inEMSBuffer[5] and LSB inEMSBuffer[6] is used. For the errCode value I ended up with the following line: errCode=((int ...

After some effort I have the read function working. I wonder if you could share the code you are using for the write part. Hi Icon. Yes, I am preparing a GitHub Project with this code. I hope I will finish it during the weekend. I will post a lik. In this repository I have uploaded my code. https ...

Could you post your code and updated library please??? I'm looking into it to make it work on UNO, getting there but not yet. Also trying on Micro which has a UART and a serial monitor separately. Found out the nefitserial library is based on arduino hardwareserial below version 1.06, so this helps ...

As far as I know you need an UART for connecting to the EMS bus. That means a hardware serial port. The EMS bus is somewhere a little tricky. As far as I know the hardware port on the UNO is also connected to the USB. (please correct me when I'm wrong) I'm now using a Leonardo where the EMS bus is ...

Thank you for your help bbqkees. I finally archieve the write functionality. I did not get to understand why the original author was using 0x91 and 0xA8 as types. As you say, some values are masked by 0x80 but those are only the destination Address and the dataoffset requested, not the frame type ...