An ESP 8 channels motor controller
(Can replace Homematic IP Floor Heating Actuator [HmIP-FALMOT-C12] ~210
The ready to go board costs less than 30$
2 Goals :
- Make a floor heating controller
- ESP motor shield
Functionalities :
- 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)
- The software runs under esphome to be easy to customize and linked with https://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 4)
- Use BEMF (back electromotive force) from motors to get endstops
- Can be directly linked to external temperature sensors (wifi,BLE, or via available free pins)
- Wide range of input power 2.5 to 6V
- Easily hackable
Fabrication :
- PCB can be ordered with chips assembled at JLPCB for 5.8$/unit.
- The 3.3v power can be HKL-5M03 or HKL-PM03 (under 2.75$)
- ESP32-WROOM-32D costs approx 3.8$
- Box is 3D printed
New version 1.3 :
- Compatible with HKL-5M03 or HKL-PM03
- Compatible with 1000 or 900 mil ESP32 board width
New version 1.4 :
- Input power can be 5V to 12V
- 5V Jumper + 3.3V exposed copper cutout
New version v53 rev 1.19 :
- Complete rebuild
- All part can be assembled at JLPCB
- Costs rise to 25$ / board (ESP not included, shipping included)
- Fix issue [#5] (#5)
- Fix HLK-PM03 footprint
- Change L9110s chips (the old one was not available anymore)
- change version number to real job
New version v54 rev 1.34 :
- Change 230V input socket with screw
- Fix regression in HLK-PM03 footprint
- Change resistors to 1.07 ohm
Firmware :
Firmware moved to it's own repo : https://github.com/nliaudat/floor-heating-controller
Licence:
- Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC-BY-NC-SA)
- No commercial use
- Actually I did not share the PCB source