Domoticz

Hi group,

I have the idea to replace the room thermostat by a SONOFF Wifi switch. By messuring the room temperature and some LUA/Dzvents scripting it should be possible to trigger the SONOFF and switch heating On/Off i guess?

2 questions:
- Am i missing something in this idea/setup?
- Are there any SONOFF Wifi switches already flashed with ESPEasy available for easy integration in Domoticz?

Thank you All help is appreciated

JimmyH1969 wrote: ↑Monday 20 August 2018 17:02 2 questions:
- Am i missing something in this idea/setup?

Which Sonoff are you planning to use? The thermostaat is probably 24V so if using a regular Sonoff you need to modify it

JimmyH1969 wrote: ↑Monday 20 August 2018 17:02 - Are there any SONOFF Wifi switches already flashed with ESPEasy available for easy integration in Domoticz?

Not sure, I re-flashed my sonoff switches myself, you only need to solder a header to connect your serial UART (be aware it uses 3.3v, ESP's are NOT 5v tolerant)

Which Sonoff are you planning to use? The thermostaat is probably 24V so if using a regular Sonoff you need to modify it

Ah i see, i thought these where just relay boards, but they output the same as the input i guess?

Not sure, I re-flashed my sonoff switches myself, you only need to solder a header to connect your serial UART (be aware it uses 3.3v, ESP's are NOT 5v tolerant)

So that means i cannot connect it the USB port straightaway, or is that whats the header for?

I would advice not to create your own thermostat script, but to use the svg Python plugin, or the dzvents version.

I use the Python version that I use to manipulate my existing iSense thermostat set point via the opentherm gateway. This makes the iSense react like on-off, while it remains an opentherm connection to the boiler.

So like i said, i just need a wifi relay switch. Would it be possible to connect this to domoticz you think?

https://www.banggood.com/Upgrade-5V-ESP ... rehouse=CN

jake wrote: ↑Monday 20 August 2018 19:16 I would advice not to create your own thermostat script, but to use the svg Python plugin, or the dzvents version.

I use the Python version that I use to manipulate my existing iSense thermostat set point via the opentherm gateway. This makes the iSense react like on-off, while it remains an opentherm connection to the boiler.

Good point. I'll use the script. The current thermostat is just a on/off thingy, not opentherm, so my guess is a relay should work...

JimmyH1969 wrote: ↑Monday 20 August 2018 19:18 So like i said, i just need a wifi relay switch. Would it be possible to connect this to domoticz you think?

https://www.banggood.com/Upgrade-5V-ESP ... rehouse=CN

I think you can, but you still need an USB-to-TTL serial port module to program it and a separate 5v powersupply. Be aware, this module is ESP-01 based and these modules have less memory ten ESP-07/12 based boards and this maybe not enough if you want to use OTA updates.

I solved it using a Qubino Flush 1D switch ZMNHND1. This device has "Dry Contacts" and perfect for switching something like this.

SweetPants wrote:

JimmyH1969 wrote: ↑Monday 20 August 2018 19:18 So like i said, i just need a wifi relay switch. Would it be possible to connect this to domoticz you think?

https://www.banggood.com/Upgrade-5V-ESP ... rehouse=CN

I think you can, but you still need an USB-to-TTL serial port module to program it and a separate 5v powersupply. Be aware, this module is ESP-01 based and these modules have less memory ten ESP-07/12 based boards and this maybe not enough if you want to use OTA updates.

I followed this instructions to install tasmota on the sonoff:
https://youtu.be/ONFhXM5R-t4

No need for soldering etc or additional power supplies.

You have to control the sonoff than with mqtt