The Opentherm has been designed to enable transfer (2-way) of the following to show just a few of the protocol capabilities:
Day of Week & Time of Day
Year
Room Setpoint by zone
Room temperature by zone
Boiler water temp
DHW temperature
Outside temperature
Outside air temperature
Return water temperature
Return water temperature to boiler
Solar storage temperature
Solar storage temperature
Solar collector temperature
Solar collector temperature
Flow temperature
Flow water temperature of the second central
So if your a designer of Opentherm, you have to implement (via the bridge) some or all of these OT commands and THEN design another protocol to transfer data between local devices, using (as I said I find it incredulous if so) another protocol which would increase overheads and no-one likes higher cost in industry, therefore it is still probable that they used OT protocols until someone from Honeywell tells us otherwise that is...
Has 'Honeywell Speak' been confirmed?
Day of Week & Time of Day
Year
Room Setpoint by zone
Room temperature by zone
Boiler water temp
DHW temperature
Outside temperature
Outside air temperature
Return water temperature
Return water temperature to boiler
Solar storage temperature
Solar storage temperature
Solar collector temperature
Solar collector temperature
Flow temperature
Flow water temperature of the second central
So if your a designer of Opentherm, you have to implement (via the bridge) some or all of these OT commands and THEN design another protocol to transfer data between local devices, using (as I said I find it incredulous if so) another protocol which would increase overheads and no-one likes higher cost in industry, therefore it is still probable that they used OT protocols until someone from Honeywell tells us otherwise that is...
Has 'Honeywell Speak' been confirmed?
Comment