HardLabs

Freewheel shift

pgmcgee·freewheel-shift·fw_shift_pcb/fw_shift_pcb.kicad_pcb

Freewheel shift PCB layout, top view — open source ESP32 board by pgmcgee

About the Freewheel shift PCB

Freewheel shift is an open source ESP32 PCB design by pgmcgee, published on GitHub under the MIT license. It is a 2-layer board measuring 25 × 35 mm, with 3 components from 2 distinct parts.

Its main chip is the XIAO-ESP32-S3-SMD, from the ESP32 family. By type, the board carries 2 switches and 1 IC.

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

From the project

ESP32-based virtual shifter for Wahoo smart trainers. Provides physical gear buttons that send virtual shifting commands directly to your trainer via BLE, giving you 24 virtual gears without needing a bike with electronic shifting.

ESP32-based virtual shifter for Wahoo smart trainers. Provides physical gear buttons that send virtual shifting commands directly to your trainer via BLE, giving you 24 virtual gears without needing a bike with electronic shifting.

- 24 Virtual Gears: Full range of virtual gears (1-24) mapped to physical buttons - Direct Trainer Control: Sends gear commands directly to Wahoo trainers via BLE - Wi-Fi Provisioning: Easy network setup via captive portal - Web UI for Trainer Selection: Scan and select your trainer from a browser - Persistent Settings: Selected trainer stored, reconnects…

Freewheel shift, from the project README
From the project README

Main components on the Freewheel shift

XIAO-ESP32-S3-SMD

Freewheel shift bill of materials (BOM)

3 components, 2 distinct parts.

QtyPartRefs
1
XIAO-ESP32-S3-SMD
U1
2
PTS645SK43SMTR92LFS
S1, S2

Freewheel shift design files

The KiCad project lives in the pgmcgee/freewheel-shift repository on GitHub; these links point at the commit this page was built from.

Freewheel shift: common questions

What microcontroller does the Freewheel shift use?

The Freewheel shift is built around the XIAO-ESP32-S3-SMD, from the ESP32 family.

How big is the Freewheel shift PCB?

The Freewheel shift measures 25 × 35 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Freewheel shift?

3 components, from 2 distinct parts. The full bill of materials is listed on this page.

Where can I download the Freewheel shift design files?

From the pgmcgee/freewheel-shift repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Freewheel shift design in my own project?

Yes, under the terms of its MIT license, which pgmcgee chose for the repository.

Can I test firmware for the Freewheel shift 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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