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(Can replace Homematic IP Floor Heating Actuator [HmIP-FALMOT-C12] ~210$ + [CCU3] ~150$)

The ready to go board costs less than 15$ (excluding shipping)

This project have rules : open hardware and sources, but not open-bar :)

• https://github.com/nliaudat/esp32_8ch_motor_shield/wiki/Project-rules

• Make a floor heating controller for proportionnal valves (look at advantages of proportionnal valves )
• ESP motor shield (done in v58 rev 1.49 )

• Can control 8 DC motors or 4 steppers motor
• Can drive 8 Homematic valve actuators [HmIP-VDMOT] (~15$ each)
• The card use a ESP32-WROOM-32D as logics and wifi connection. (You can get a 32U if you want an external antenna).
• It now supports the ESP32-C3 supermini
• The software runs under esphome to be easy to customize and linked withhttps://www.home-assistant.io
• Can be extended up to 16 channels (I recommend to get 2 boards for better performances, but the shifts registers can be extended up to 4shiftregOut)
• Use BEMF (back electromotive force) from motors to get endstops
• Can be directly linked to external temperature sensors (wifi,BLE, or via availablefree pins)
• 2 onewire connectors (to have precise IN/OUT temperature control over heating circuit)
• USB-C power input or 5-12V input
• Easilyhackable

• PCB can be ordered with chips assembled at JLPCB for 13$/unit. (:warning: For old AC version, you have to isolate the AC part with tape)
• The new version use DC input only with usb-c up to 3A (or custom 5-12V input)
• ESP32-WROOM-32D devkit with 38 pin costs approx 3.8$ . The ESP32-C3 supermini approx 2.5$
• Box is 3D printed

• Floor heating :https://github.com/nliaudat/floor-heating-controller
• Motor control :https://github.com/nliaudat/esphome-8-ch-motor-controller

https://github.com/nliaudat/floor-heating-proportional-valve | need help !

We tried to ease the steps to get you going to produce the Enclosure and order/assemble your Controller-Board. Please have a look attheHOWTO get going documentation.

https://oshwlab.com/nliaudat/floor_heatin_controller_v61

• Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC-BY-NC-SA)
• No commercial use