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Your explanation could not be clearer, thanks again! I know what to do in the summer season (when I can disconnect the OTGW without risk of disrupting current operation): upgrade the PIC FW. Then I can leave out the reset line, although I already soldered an extra level-switch circuit to GPIO0 on th...

Thank you! That is good to know. I will make the change. I plan to move to 0.10.X later, but seeing the ambitions of the project and the growing program size, I will have to stop updating at some point with the 1MB ESP-01. By the way, I plan to make a reset line from the ESP to the PIC reset input, ...

Hi rvdbreemen, I've got a slightly differend hardware setup. The classic OTGW hardware with the Recom DC/DC convertor mod. And instead of the MAX232 IC, I connected a ESP8266-12E VCC=5V. On it I run the ESP-LINK: Wifi-Serial Bridge w/REST&MQTT V2.2.3 . To use your Nodemcu firmware the only thin...

Follow up: also notice the wording""(Note that DATA-VALUE may be modified by the slave in some circumstances.)". This also suggests that the DATA-ID should *not* be modified. Although this is only mentioned for the Write-Data and Writing invalid data sections. Not in the Read-Data sec...

In the Conversation details section, on page 20-21. It does not literally say it should be the *same* data ID, but, as you mentioned, it implies this by stating that the slave should respond with the (a?) data ID. A very loose interpretation of this could be that it is allowed to send any data ID. B...

Thanks for your comment. I see what you mean. I had a brief look at the Opentherm Protocol (version 2.2). It says that all slave responses should contain the same data ID that was included in the master request. And further down it states that "in case of errors" the incoming frame should ...

I am happily using the OTGW together with a Honeywell Round Connected Modulation thermostat and Atag I series 36EC boiler for a number of years now, still using 4.2.5 FW (slightly modified to use the SB feature to change the control setpoint). I use Domoticz to monitor the setup. It is all working f...

Thanks for providing the diff. Much appreciated!

Tom

Hi Bart, I have implemented your modified firmware of viewtopic.php?f=75&t=11419 in my 2-zone setup (ATAG i36EC boiler, Honeywell Round Connected thermostat) and it appears to work nicely! (So the setting of the controlsetpoint a with a thermostat-controlled relay connected to the GPIO B pin, in...