HardLabs

OpenDTU-BreakoutBoard

dokuhn·openDTU-BreakoutBoard·KiCad/openDTU.kicad_pcb

OpenDTU-BreakoutBoard PCB layout, top view — open source ESP32 board by dokuhn

About the OpenDTU-BreakoutBoard PCB

OpenDTU-BreakoutBoard is an open source ESP32 PCB design by dokuhn, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 50 × 50 mm, with 9 components from 4 distinct parts.

Its main chip is the ESP32NodeMCU, from the ESP32 family. Other key parts include the NRF24L01+PA+LNA_Breakout. By type, the board carries 6 test points, 2 ICs and 1 capacitor.

It belongs with the dev boards & breakouts and sensors designs in this gallery.

From the project

To read Hoymiles inverters there is a nice project called OpenDTU which uses an ESP32 to talk to them.

To read Hoymiles inverters there is a nice project called OpenDTU which uses an ESP32 to talk to them.

To extend this project with a hardware component this small KiCAD board was created. With it it should be possible for the not experienced in soldering person to build an own OpenDTU easier. But also the possibility to add further ideas, like temperature sensors, display etc.. In a second step it is also possible to design a board with all the necessary components on it directly.

OpenDTU-BreakoutBoard, from the project README
From the project README

Main components on the OpenDTU-BreakoutBoard

ESP32NodeMCUNRF24L01+PA+LNA_Breakout

OpenDTU-BreakoutBoard bill of materials (BOM)

9 components, 4 distinct parts.

QtyPartRefs
1
ESP32NodeMCU
U1
1
NRF24L01+PA+LNA_Breakout
U2
6
TestPoint
TP1, TP2, TP3, TP4, TP5, TP6
1
10uF
C1

OpenDTU-BreakoutBoard design files

The KiCad project lives in the dokuhn/openDTU-BreakoutBoard repository on GitHub; these links point at the commit this page was built from.

OpenDTU-BreakoutBoard: common questions

What microcontroller does the OpenDTU-BreakoutBoard use?

The OpenDTU-BreakoutBoard is built around the ESP32NodeMCU, from the ESP32 family.

How big is the OpenDTU-BreakoutBoard PCB?

The OpenDTU-BreakoutBoard measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OpenDTU-BreakoutBoard?

9 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the OpenDTU-BreakoutBoard design files?

From the dokuhn/openDTU-BreakoutBoard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the OpenDTU-BreakoutBoard design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the OpenDTU-BreakoutBoard 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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