I know that they do several versions of the tempo disc - one with a button, and a cheap one without humidity. But they are all BLE, and all quote the battery life based on hourly polling.
There's only about 200mAh in a CR2032.
I know that they do several versions of the tempo disc - one with a button, and a cheap one without humidity. But they are all BLE, and all quote the battery life based on hourly polling.
There's only about 200mAh in a CR2032.
So now that I am only have one 2 port motorised valve for HW, should I install 3 x gate valves (where the original CH zone valves would have gone) in order to help radiator balancing? Is radiator balancing even required with EvoHome?
Others have successfully polled these devices for data without using the gateway or app. So that bit's easy. The tricky part is then getting the data into Evohome.
With my radio stuff it's pretty easy to write something that binds as a temperature sensor, so it could receive and forward the temperature from this. I don't know if it would work with an HGI80 or not because I don't know if it gives you full control of the address fields in the radio protocol.
Wasn't there some guy who managed to sniff the radio data off the back of the Relay itself. I know it was read only, but could be useful to people who just want to see the HGI80 style data on Domoticz. Or the Busware USB device with some modified CUL firmware running on a Raspberry Pi.
I use the Busware SCC device with my own firmware.
Well, starting installation now but I wondered if I want to site the hot water BDR91 near the cellar stairs (closer to the main house as opposed to 30cm from the boiler), how does one extend the location of the hot water BDR91 as it is connected to the hot water probe which goes into the cylinder?
The hot water probe is not connected to the hot water BDR91.
There is a separate transmitter unit (CS92A) which connects to the temperature probe on the cylinder and sends the reading back to the main controller wirelessly. The controller then sends a wireless signal to the hot water BDR91 (and boiler relay if you use one) based on the schedule and whether the temperature is below the set hot water temperature or not.
So there is no problem extending the location of the BDR91 further from the cylinder using normal 240v mains flex - you'll need 3, 4 or 5 wires in the flex depending on what relay contacts you need to use and whether you need switched 240v or volt free contacts. For a typical case of driving a 240v zone valve you'll only need 3 wires - or 4 wires if you want to wire for hot water priority.
Likewise the cable between the temperature probe and CS92A can be extended if needed - it is very low voltage DC so could be extended using normal two wire figure 8 cable such as light duty speaker cable. I've found the CS92A a bit finicky about its placement for getting a reliable wireless signal, however as it is battery powered and only needs a low voltage two wire cable to extend further away from the cylinder sensor it is easy to move. I would avoid running any cable extension for the CS92A in parallel with 240v mains wiring though to avoid interference.
Last edited by DBMandrake; 5th February 2017 at 05:37 PM.