HardLabs

HeatPumpControl

hansrune·HeatPumpControl·KiCad/HeatPumpControl.kicad_pcb

HeatPumpControl PCB layout, top view — open source ESP32 board by hansrune

About the HeatPumpControl PCB

HeatPumpControl is an open source ESP32 PCB design by hansrune, published on GitHub. It is a 2-layer board measuring 34.3 × 40.9 mm, with 30 components from 14 distinct parts.

Its main chip is the SeedStudio XIAO ESP32 C3 v1, from the ESP32 family. Other key parts include the TSOP23xx. By type, the board carries 13 resistors, 10 diodes, 3 connectors, 2 ICs, 1 transistor and 1 capacitor.

It belongs with the iot & wireless and sensors designs in this gallery.

From the project

ESP32c3 board with IR blaster and serial ports for heat pump control over local WiFi with ESPHome or ESPEasy firmwares

A small generic mini IO based on ESP32c3. This one has an IR blaster, IR receiver, and serial port with a simple 5V - 3.3V level shifter suitable for Mitsubishi CN105 port. Other ESP32c3 pins are available with pin headers for I2C, 1-wire, and other general purposes

This small IO board was made to easily fit inside a small DYI box, a heat pump or other.

For Mitsubushi heat pumps, the CN105 connector is used for serial port communications and for power supply.

HeatPumpControl, from the project README
From the project README

Main components on the HeatPumpControl

TSOP23xxSeedStudio XIAO ESP32 C3 v1

HeatPumpControl bill of materials (BOM)

30 components, 14 distinct parts.

QtyPartRefs
1
TSOP23xx
U1
1
SeedStudio XIAO ESP32 C3 v1
U2
1
2N2222A
Q1
3
Conn_01x04_Male
J1, J2, J3
2
IR LED
D1, D2
2
~
D3, D6
6
1N4148
D4, D5, D7, D8, D9, D10
1
10uF
C1
2
27
R1, R2
1
470
R3
1
1.2k
R4
2
10k
R5, R6
1
430
R7
6
4k7
R8, R9, R10, R11, R12, R13

HeatPumpControl design files

The KiCad project lives in the hansrune/HeatPumpControl repository on GitHub; these links point at the commit this page was built from.

HeatPumpControl: common questions

What microcontroller does the HeatPumpControl use?

The HeatPumpControl is built around the SeedStudio XIAO ESP32 C3 v1, from the ESP32 family.

How big is the HeatPumpControl PCB?

The HeatPumpControl measures 34.3 × 40.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the HeatPumpControl?

30 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the HeatPumpControl design files?

From the hansrune/HeatPumpControl repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the HeatPumpControl design in my own project?

The repository has no license, so all rights stay with hansrune. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the HeatPumpControl without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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