Find helpful customer reviews and review ratings for Honeywell Rondostat HR- 20 Radiator Thermostat Timer at Read honest and unbiased. ft3/hr m3/hr ft3/hr m3/hr ft3/hr m3/hr. VR 1/2 x 1/2. 10d. VR 20e . Control Engineering review; contact your Honeywell. ft3/hr m3/hr ft3/hr m3/hr. SV 10d. SV 1/2 x 1/2. 20e. . applications require Honeywell Home and Building Control.

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Delivery times may vary, especially during peak periods. Thanks a lot, Robert. Hello, I’m new to this forum and I have been playing around with the new firmware for the HR20E for some time.

If you want to use rev please change configuration 0b to 0x32 hex It contain bug Valve can still close, same bug as original SW see Datum It would enable full communication as HR Due to problems with window detection I made completly new window open detection. The commands are not case sensitive. Will usually ship within 1 business day of receiving cleared payment – opens in a new window or tab. If I don’t want to use a switching timer, It is going to be powered by batteries only.

Visit eBay’s page on international trade. This mean that status packets one year average take 6mAh. I’m about to buy some HR20s to join this very interesting HR20 development. It is going to be an A based transceiver. I thought, the HR20 works like this: Please be aware that this page describes the v1 hardware, which has been obsolete for several years.


Touched Revisions on main trunk is I could hear honeywel, the valve was still open. Time slot can be used as block for one slave long communication.

It’s going to be powered from main through an adaptor.

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To compile it, you need cmake. After playing around with the various versions for some time now, I have one remark not complaining, just asking for your opinion: Rev have changed numbers of settings in eeprom.

But Jiri might be right, that long wires can be a problem for the signal edges although the overall speed can be as slow as wished. See to hooneywell log.

Hello I have buy an other HR20 www. Problem can be that current SW realy need “master” board.

I think modification for RFM12 will be possible. NET is quite powerful. I have also a Thermotronic module and the code shows adjustments for this module which can be enabled per compiler switch. Hello, first a big respect to all members in this forum which do a great job to honfywell the new firmware.

It was fix problem with “On” setting.

OpenHR Firmware for Honeywell Rondostat HR20E –

The panel can be pryed off with a sharp knife, small screw driver or similar, but it actually seems to be easiest to “push it off” from the inside.


Very easy to programme heating time and temperature of room to be maintained. I was repeat it and this bug is real. I was make mistake in my test. X Current day in switching time table has style bold instead of italic With in command window, comments can be added for better documentation of the log file A detected open window will be shown in status bar For com interface DTR and RTS signal state can be changed via openHR20Suite.

It should neither be a problem with the valves since the radiators get warm when I turn the blue wheel by my self, and since the problem does not occur in the full-stroke mode.


Idea was stop motor ouside problematic position around motor pulse edge. Motor speed is not significant for valve position. When updating this memory location, also set location to the same value.

But till now I was not have any accident from this, because we are use 15 second average for temperature controler. It will be prepared for SVN tomorrow I hope.

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