Home Automation Domotica Forum Europe, Bwired Forum

I would also pay a visit on Thursday.

Thanx

That is a plausible explanation. I'll try to borrow a logic analyzer from work (when one is not used) and to see what is exactly going on. With the otgw/arduino setup I can easily reproduce the situation. I'll keep you posted.

Hi all, As follow up from my previous post, it seems the opentherm gateway is sensitive for disturbances on the serial connection: (1) if I leave the serial connection open (no connection) for longer time (hours) the otgw will start outputting repeatedly the following 4 bytes: 0x4F 0x70 0xFF 0x04. T...

I'm actually trying to do the same. I have also an old Powermax (H 5452, manufactured in 2002). It also has 4 pin connector for the RS232. I'm not sure yet, but I think the pin out is as follows (looking from the back towards the connector): <+5v> <Tx> <Rx> <GND> The GND pin I guessed by looking at ...

Hi all, After one night running the opentherm gateway I see the first glitch in my setup. The thermostat was reporting "no communication" and the heating was obviously off (cold house, need to keep friends with the spouse :) ). Not sure if it's hardware/software or the combination. Here ar...

Hi all, I just build and installed an opentherm gateway in my house. Configuration is: Boiler: Intergas Kombi Compact HR 36/30 Thermostat: Honeywell Chronotherm vision modulation FW version 4.0a11 The opentherm gateway passed all the diagonistic tests except the bit timing of the boiler. Therefore I...