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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I also store the last hour value to eeprom and have the minute and second value uninitialized at startup I just test yr-20e the value is reasonable, means in Have to dig deeper into that code first or wait for your solution: Seems the 8th address line is not used. Next thing I already started is the wireless remote control of most of the internal and external lights and also some other electronic devices, all with the same RFM12 receivers MHz in my case.

OpenHR Firmware for Honeywell Rondostat HR20E –

Thanks for bug report! I too figured out a problem regarding loss of pulses. I fully agree, that current controller part can be improved, but it need some suficient matematical model. I am sure that you know this RFM feature but you forget write it in proposal.

It have false “close” detection. See other items More Do you have an idea how this can be solved? I was make mistake in my test. And then a WEB interface would be nice, too. But still I can give it a try. Learn More – opens in a new window or tab International shipping and import charges paid to Pitney Bowes Inc.


You can read it by config.

So, what do you want to do? Worked ok more or less as I did not ‘know’ or understand the code enough that this software does not switch the temperatures to the preset values like the normal software does in automatic mode. This is requested hhoneywell the C standard and casting the parameters to 8bit types doesn’t change this behaviour. Can you try mount this HR20 into another valve? Rev is just proof of concept for bi-directional communication.

It is usual in numeric PID controllers. No problems with compiling and exactly the features added to the original code that I missed.


Thomas V Modification for Thermotronic would be nice. I think it is possible to change pinconfiguration to use hw-uart but boneywell have to do changes on the pcb so I think this would be a solution for only a few people. The connector pinout is as follows:. Just found this project and is very eager to try to build the software and hack my HR20 thermostats.

Customer reviews

But it still need “master” for manage network and encryption. According to the pin-numbering on the PCB layout, pin 1 is in the bottom right corner when viewing the HRE from the side with the adjustment wheel on the right and the radiator on the left.


HR20 listens another second for a further command again with rand includedand if not occuring, HR20 waits a minute till 1. See to branch for RFM12 wireless communication on development, not work now.

Programmer can read and check chip signature without programming. When motor move sometimes during eye is off, sometimes we will see “Y” after x. If I enter It is strange, that diffence between this two values is bigger than 1. And master can be syncronized from internet.

Which website can someone find celebrex online. When all this is completed, I also need a gateway between PC and this wireless network. It is same wavelength. So, whats the Default-Mode? You can h-r20e get the status. SW on PC side have 2 parts: Both is in PHP.

:Customer reviews: Honeywell Rondostat HR Radiator Thermostat Timer

Could you tell us some words about these things? Shopbop Designer Fashion Brands. How you want to control this network without this interface?

Hi just managed to flash the first HR Reason is potential synchronization poisoning from attacker. Also, it takes 3 wire SPI instead of 4.