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RF-WiFi-Bridge

KHit6·RF-WiFi-Bridge

RF-WiFi-Bridge PCB layout, top view — open source ESP32 board by KHit6

About the RF-WiFi-Bridge PCB

RF-WiFi-Bridge is an open source ESP32 PCB design by KHit6, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 58 × 93 mm, with 14 components from 11 distinct parts.

Its main chip is the ESP32_C3_Supermini, from the ESP32 family. Other key parts include the RXB6-Receiver, MCP1702-330xxTO, Module RXB12 SYN470R, Module SYN480R and Module SYN115. By type, the board carries 7 ICs, 5 capacitors, 1 diode and 1 resistor.

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

From the project

A simple hardware design to bridge between 433 MHz devices and WiFi

Also it should be a replacement for Sonoff's RF-Bridge. RF-Bridge mostly must be hardware modified and lacks an easy way to directly install a custom firmware. Shortly, it is complicated in use.

My main goal was to receive sensor data from low cost TFA (or LaCrosse) 433 Mhz temperature and humidity sensors to use the data with ESPHOME and Home Assistant. The companion repository rf-sensor-bridge (previous tfagateway) provides the open source code base to receive data from such sensors.

RF-WiFi-Bridge, from the project README
From the project README

Main components on the RF-WiFi-Bridge

ESP32_C3_SuperminiRXB6-ReceiverMCP1702-330xxTOModule RXB12 SYN470RModule SYN480RModule SYN115E07-M1101D

RF-WiFi-Bridge bill of materials (BOM)

14 components, 11 distinct parts.

QtyPartRefs
1
ESP32_C3_Supermini
U1
1
RXB6-Receiver
U2
1
MCP1702-330xxTO
U3
1
Module RXB12 SYN470R
U4
1
Module SYN480R
U5
1
Module SYN115
U6
1
E07-M1101D
U7
1
LED gn
D1
3
100n
C1, C2, C3
2
100u
C5, C6
1
1k
R4

RF-WiFi-Bridge design files

The KiCad project lives in the KHit6/RF-WiFi-Bridge repository on GitHub; these links point at the commit this page was built from.

RF-WiFi-Bridge: common questions

What microcontroller does the RF-WiFi-Bridge use?

The RF-WiFi-Bridge is built around the ESP32_C3_Supermini, from the ESP32 family.

How big is the RF-WiFi-Bridge PCB?

The RF-WiFi-Bridge measures 58 × 93 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RF-WiFi-Bridge?

14 components, from 11 distinct parts. The full bill of materials is listed on this page.

Where can I download the RF-WiFi-Bridge design files?

From the KHit6/RF-WiFi-Bridge repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the RF-WiFi-Bridge design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which KHit6 chose for the repository.

Can I test firmware for the RF-WiFi-Bridge 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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