ESP32-S3 RS485 Board Fork
Budget: $30 – $250 USD
I already have an EasyEDA project for a compact ESP32-S3 board that currently hosts a CAN transceiver. I now need a clean fork that swaps the CAN interface for a fully-functioning RS-485 interface while keeping every other feature, footprint and pinout exactly the same.
The key electrical changes are straightforward: replace the CAN transceiver with an RS-485 device and add any supporting biasing, termination and protection components required for robust half-duplex 485 communication. I am open to your suggestions on the specific transceiver IC—feel free to choose the part that offers the best mix of availability on LCSC, 3.3 V compatibility and proven reliability.
Nothing else on the board should change: USB-C, power-regulation, GPIO headers, boot circuitry and all test points must remain untouched so firmware and mechanical integration stay drop-in compatible with the original design.
Deliverables (JLCPCB-ready):
• Updated EasyEDA schematic and PCB files
• Clean, DRC-passing Gerbers, drill files and pick-and-place data
• BOM and CPL files restricted to in-stock LCSC parts
• Brief change log explaining the RS-485 section
I will supply the existing EasyEDA project as soon as we start. A short explanation of your chosen transceiver and any signal-integrity decisions will be enough for sign-off—no lengthy report required.
To bid, send:
1. 2–3 prior EasyEDA + JLCPCB projects you've shipped
2. Fixed price and timeline
3. Your RS-485 transceiver pick + why
Auto-generated proposals and copy-paste intros get rejected immediately. To show you read this, (1) start your reply with the word "viking", and (2) tell me which RS-485 transceiver you'd pick from JLCPCB stock and why. Bids without both will be ignored.
The key electrical changes are straightforward: replace the CAN transceiver with an RS-485 device and add any supporting biasing, termination and protection components required for robust half-duplex 485 communication. I am open to your suggestions on the specific transceiver IC—feel free to choose the part that offers the best mix of availability on LCSC, 3.3 V compatibility and proven reliability.
Nothing else on the board should change: USB-C, power-regulation, GPIO headers, boot circuitry and all test points must remain untouched so firmware and mechanical integration stay drop-in compatible with the original design.
Deliverables (JLCPCB-ready):
• Updated EasyEDA schematic and PCB files
• Clean, DRC-passing Gerbers, drill files and pick-and-place data
• BOM and CPL files restricted to in-stock LCSC parts
• Brief change log explaining the RS-485 section
I will supply the existing EasyEDA project as soon as we start. A short explanation of your chosen transceiver and any signal-integrity decisions will be enough for sign-off—no lengthy report required.
To bid, send:
1. 2–3 prior EasyEDA + JLCPCB projects you've shipped
2. Fixed price and timeline
3. Your RS-485 transceiver pick + why
Auto-generated proposals and copy-paste intros get rejected immediately. To show you read this, (1) start your reply with the word "viking", and (2) tell me which RS-485 transceiver you'd pick from JLCPCB stock and why. Bids without both will be ignored.