This repository contains a series of PCB designs used to interface between the Boiler System Bus (BSB) of certain heating systems and network interfaces.
The hardware is compatible with the ESP32 software implementations from fredlcore/BSB-LAN. Note: This repo is not affiliated with said project in any way - support queries for these PCB designs should not be directed to that project.
The hardware is based around an ESP32 controller, with either PoE LAN or WiFi network connectivity.
The PCBs have been laid out using Eagle PCB V6.6 and use predominantly surface mount components to make machine assembly easier. Parts used are all available for assembly in JLCPCBs parts catalogue.
A library file containing all parts used is included in the repository.
CAM files are included for generating 2-Layer and 4-Layer Gerber files using a naming scheme compatible with JLCs upload.
The repository contains a ULP file that can be run to generate the CPL/BOM files for upload to JLC.
The LCSC_PART and JLC_X/Y/ROTATION attributes have been added for each component to simplify generation of the assembly spreadsheets required by JLC. If changing the PCB designs, ensure these attributes are updated as necessary.
A full implementation including ESP32 WROOM-32UE controller, PoE Ethernet power and networking, and USB programming and SD card interfaces.
This design has been built and is fully functional. It requires the following settings in the BSB-LAN software:
- In
BSB_LAN_config.h: Configure the following setting:byte bus_pins[2] = {36,4}; - In
BSB_LAN_custom_setup.h: Add the following code:// Set TX Enable pin to output and set high now that the system is initialised and the // TX line is being driven correctly pinMode(32, OUTPUT); digitalWrite(32, HIGH);
The board and components have been designed for use with JLCPCBs economic assembly process.
The form factor of the board has been designed to fit in a Camdenboss CNMB/3/KIT DIN mount enclosure to provide a tidy fully enclosed solution.
Designed to work with the ESP32-POE-ISO controller from Olimex, connecting vial the UEXT headers.
The PCB schematic is simply based on the design found at in the GitHub repository fredlcore/BSB-LAN.
There are some slight adaptions to provide ESD protection for the isolated B2B interface and designed to be surface-mount machine for machine assembly.
A full implementation including ESP32 WROOM-32E controller, WiFi-only networking (PCB antenna, footprint compatible with external antenna), and USB programming and SD card interfaces. This variant omits the LAN components to reduce the number of parts and make the board cheaper to manufacture. Power is supplied from either a 12V screw terminal (isolated through DC/DC for safety), or powered by the USB programming port.
The board and components have been designed for use with JLCPCBs economic assembly process.
The form factor of the board has been designed to fit in a Camdenboss CNMB/2/KIT DIN mount enclosure to provide a tidy fully enclosed solution.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
