HardLabs

Twomes co2-monitor hardware

energietransitie·twomes-co2-monitor-hardware·pcb/CO2-Breakout.kicad_pcb

Twomes co2-monitor hardware PCB layout, top view — open source ESP8266 board by energietransitie

About the Twomes co2-monitor hardware PCB

Twomes co2-monitor hardware is an open source ESP8266 PCB design by energietransitie, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 28 × 33 mm, with 4 components from 4 distinct parts.

Its main chip is the WeMos_D1_mini, from the ESP8266 family. Other key parts include the Si7051-A20. By type, the board carries 2 ICs and 1 capacitor.

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

From the project

Open hardware design files for the Twomes CO₂ Monitor Shield

This repository contains the open hardware design files for the Twomes CO₂ Monitor Shield, which can measure CO₂ concentration, relative humidity and temperature. It has the form factor of a WeMos D1 Mini shield. This allows it to be used in many ways, e.g.: on top of Twomes Temperature Monitor Hardware; on top of a LilyGO TTGO T7 Mini32 V1.3 ESP32.

The associated firmware you should use depends on the context: if you use the shield on top of Twomes Temperature Monitor Hardware, use the Twomes Room Monitor firmware; if you use the shield on top of a LilyGO TTGO T7 Mini32 V1.3 ESP32, use the…

Twomes co2-monitor hardware, from the project README
From the project README

Main components on the Twomes co2-monitor hardware

Si7051-A20WeMos_D1_mini

Twomes co2-monitor hardware bill of materials (BOM)

4 components, 4 distinct parts.

QtyPartRefs
1
Si7051-A20
U1
1
WeMos_D1_mini
U2
1
SCD41
SCD1
1
C
C1

Twomes co2-monitor hardware design files

The KiCad project lives in the energietransitie/twomes-co2-monitor-hardware repository on GitHub; these links point at the commit this page was built from.

Twomes co2-monitor hardware: common questions

What microcontroller does the Twomes co2-monitor hardware use?

The Twomes co2-monitor hardware is built around the WeMos_D1_mini, from the ESP8266 family.

How big is the Twomes co2-monitor hardware PCB?

The Twomes co2-monitor hardware measures 28 × 33 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Twomes co2-monitor hardware?

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

Where can I download the Twomes co2-monitor hardware design files?

From the energietransitie/twomes-co2-monitor-hardware repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Twomes co2-monitor hardware design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which energietransitie chose for the repository.

Can I test firmware for the Twomes co2-monitor hardware without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

Similar boards