HardLabs

Wmbus

absmach·a0·modules/wmbus/wmbus.kicad_pcb

Wmbus PCB layout, top view — open source board by absmach

About the Wmbus PCB

Wmbus is an open source PCB design by absmach, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 25.4 × 28.6 mm, with 6 components from 5 distinct parts.

Other key parts include the RC-S2LP-868. By type, the board carries 2 connectors, 2 resistors, 1 IC and 1 capacitor.

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

From the project

A0 IoT Gateway

A plug-in expansion module for the A0 base board implementing Wireless M-Bus (EN 13757-4).

The WMBUS module adds a Wireless M-Bus radio for reading utility meters (heat, water, gas, electricity). Plug it into one of the A0 base board's expansion slots (BUS1 or BUS2) to enable smart metering deployments.

- Wireless M-Bus (EN 13757-4) communication - Connects to the ESP32-C6 over the expansion bus - Powered from the expansion bus

Main components on the Wmbus

RC-S2LP-868

Wmbus bill of materials (BOM)

6 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RC-S2LP-868
U2
2
CONN_01X08
Conn_01x08
J1, J2
1
0.1UF
0.1uF
C1
1
100
R1
1
10K
R2

Wmbus design files

The KiCad project lives in the absmach/a0 repository on GitHub; these links point at the commit this page was built from.

Wmbus: common questions

How big is the Wmbus PCB?

The Wmbus measures 25.4 × 28.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wmbus?

6 components, from 5 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Wmbus design files?

From the absmach/a0 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Wmbus design in my own project?

Yes, under the terms of its Apache-2.0 license, which absmach chose for the repository.

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