This repo contains documentation on how to integrate the Water Guard remote interface WTG-35A with Home Assistant using ESPHome
- Water Guard Remote Interface WTG-35A
- ESP8266 NodeMCU
- Various dupont cables
- 12V power supply
- Two double WAGO blocks
- Optional: A 7-pin WAGO block if you don't want to solder ground wires together
BEWARE: Don't connect the USB port of the ESP8266 to your computer for programming while you power the devices with 12V, or you will probably damage your computer's USB port.
- The ESPHome YAML file contains the pinouts for the various outputs and inputs of the WTG-35A. Feel free to tweak the naming of things as needed.
- The wiring diagram in the
upstream-docsfolder shows which pins of the WTG-35A do what. - Since this particular variant of the ESP8266 NodeMCU has a voltage regulator that tolerates up to 15V input power, you can use a single 12V power supply to power both the WTG-35A and the NodeMCU at the same time without any extra components. Since the WTG-35A comes with a 12V power supply, I've just used that one.
- Look at the images for details on how I connected things together.
- I soldered together all of the negative/black wires for a common ground.
- The WTG-35A uses opto-couplers inside, so all of the ports are potensial free.
- The Home Assistant device page shows how I've set it up in my home.
- The
automationsfolder contains the YAML files for the automations shown. You'll need to adjust the device identifier in your own automations.
- I'm thinking that the alarm reset switch could be implemented as a
buttonentity instead, but I haven't found the time yet to implement it. - Would be very nice with a 3D-printed box that could contain all of this neatly.
This repository is informational. If you follow these instructions and break something, I have absolutely no responsbility for your mishaps.
Robin Smidsrød robin@smidsrod.no
Or open up an issue or create a PR if you have improvements.