zhou-peter/esp32_8ch_motor_shield

An ESP32 based 8 channels motor controller (to replace Homematic IP Floor Heating Actuator)

An ESP 8 channels motor controller

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

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] (nliaudat#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