2 layers34 × 46 mm ESPDali, the printed circuit board in 3D

ESPDali

Interface with DALI compatible lighting devices using ESPHome project

Size: 34 × 46 mm
Copper layers: 2
Thickness: 1.67 mm
Parts: 46
Nets: 53
Pads: 165
Tracks, vias: 241, 63
Pours: 6
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 30 Oct 2023
Updated: 18 May 2026

Overview

ESPDali is an open-source printed circuit board by petrinm, from the petrinm/ESP32Dali repository on GitHub, published under the MIT licence. It is a 2-layer board of 34 × 46 mm with 46 parts on 53 nets, routed with 241 tracks and 63 vias.

It is built around the ESP32-WROOM-32, LM27313XMF and TLP185, with the BCX56-16, MB1S and NSR0530H among its other parts. Its parts include 16 resistors, 9 capacitors, 6 diodes, 5 ICs and 3 transistors. It belongs with the home automation and IoT and lEDs and displays boards and the ESP32 boards of this library.

Main components

README

README.md

ESP32Dali

ESP32Dali is an ESP32-based, ESPHome-friendly interface to DALI lighting devices. It acts as a master on the DALI bus through an isolated front-end, and can also provide 18 V DALI supply voltage from 5 V input.

The board is a matchbox-sized 2-layer PCB that hosts an ESP32-WROOM-32 plus the DALI interface.

Schematic & PCB: hw/ (KiCanvas, PDF)
3D STEP and printable enclosure: 3d/
ESPHome external components: components/

ESP32Dali ESP32Dali front side ESP32Dali back side

Example ESPHome configuration

The dali component can be pulled in as an external component, so the same configuration works on the ESP32Dali board and on any other ESP32 with a compatible DALI front-end.

yaml

esphome:
  name: livingroom
  friendly_name: Livingroom

esp32:
  board: esp32dev
  framework:
    type: arduino

external_components:
  - source:
      type: git
      url: https://github.com/petrinm/ESP32Dali.git
    components: [ dali ]

dali:
  id: dali_if
  tx_pin:
    number: 17
    inverted: true
  rx_pin:
    number: 16
    inverted: true

Build and flash with:

bash

$ esphome run livingroom.yaml

License

Released under the MIT License.

Parts

Qty	Value	Footprint	References
2	0R	Resistor_SMD:R_0805_2012Metric	R8, R10
2	10k	Resistor_SMD:R_0603_1608Metric	R7, R11
2	1k	Resistor_SMD:R_0603_1608Metric	R4, R17
2	2pin 3.5mm terminal block	Connector_Phoenix_MC:PhoenixContact_MC_1,5_2-G-3.5_1x02_P3.50mm_Horizontal	J1, J2
2	330	Resistor_SMD:R_0603_1608Metric	R2, R5
2	BCX56-16	Package_TO_SOT_SMD:SOT-89-3	Q1, Q3
2	MountingHole	MountingHole:MountingHole_3.2mm_M3	H1, H2
2	Red LED	LED_SMD:LED_0603_1608Metric	D4, D6
2	TLP185	Package_SO:SOIC-4_4.55x3.7mm_P2.54mm	U2, U4
1	0R	Resistor_SMD:R_0603_1608Metric	R9
1	100n	Capacitor_SMD:C_0603_1608Metric	C7
1	100p	Capacitor_SMD:C_0603_1608Metric	C4
1	10u	Inductor_SMD:L_Wuerth_MAPI-3020	L1
1	12k	Resistor_SMD:R_0603_1608Metric	R13
1	13k	Resistor_SMD:R_0603_1608Metric	R6
1	180k	Resistor_SMD:R_0603_1608Metric	R3
1	1n	Capacitor_SMD:C_0603_1608Metric	C9
1	1u	Capacitor_SMD:C_0603_1608Metric	C8
1	1u 25V	Capacitor_SMD:C_0805_2012Metric	C5
1	1u 6V	Capacitor_SMD:C_0603_1608Metric	C6
1	2.54mm pin header	Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical	J3
1	200mA Polyfuse	Fuse:Fuse_0805_2012Metric	F1
1	220p	Capacitor_SMD:C_0603_1608Metric	C2
1	2R7 1%	Resistor_SMD:R_0805_2012Metric	R1
1	2u2 25V	Capacitor_SMD:C_0805_2012Metric	C1
1	330R	Resistor_SMD:R_0603_1608Metric	R18
1	3V Zener	Diode_SMD:D_SOD-323	D3
1	4k7	Resistor_SMD:R_0603_1608Metric	R12
1	4u7 25V	Capacitor_SMD:C_0805_2012Metric	C3
1	5k	Resistor_SMD:R_0603_1608Metric	R14
1	Blue LED	LED_SMD:LED_0603_1608Metric	D5
1	ESP32-WROOM-32	RF_Module:ESP32-WROOM-32	U5
1	LM27313XMF	Package_TO_SOT_SMD:SOT-23-5	U1
1	MB1S	ESPDali:MB1S	D2
1	MCP1703A-330	Package_TO_SOT_SMD:SOT-223-3_TabPin2	U3
1	NSR0530H	Diode_SMD:D_SOD-323	D1
1	SMBT2222A	Package_TO_SOT_SMD:SOT-23	Q2

Questions

How big is the ESPDali PCB?

It measures 34 × 46 mm and has 2 copper layers, 1.67 mm thick.

What parts does the ESPDali use?

46 parts, built around the ESP32-WROOM-32, LM27313XMF, TLP185 and BCX56-16. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the ESPDali KiCad files?

From the petrinm/ESP32Dali repository on GitHub, at the commit this page was made from: the board is hw/ESPDali.kicad_pcb and its schematic hw/ESPDali.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the ESPDali design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Home automation and IoT LEDs and displays ESP32

Topics

dali dali-bus esphome esp32

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/petrinm-esp32dali" title="ESPDali in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/petrinm-esp32dali.jpg" alt="ESPDali" width="1200" height="900">

A picture that opens the board, for a README

[![ESPDali](https://pcbkit.io/embed/boards/petrinm-esp32dali.jpg?size=s)](https://pcbkit.io/boards/petrinm-esp32dali)

Source

Repository: petrinm/ESP32Dali
Board file: hw/ESPDali.kicad_pcb
Commit: 9b5e2d7
Licence: MIT

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