Pi Zero Bikecomputer
An open-source bike computer based on Raspberry Pi Zero (W, WH, 2 W) with GPS and ANT+.
https://awesomeopensource.com/project/hishizuka/pizero_bikecomputer
News
- 2022/6/12 Please delete log/log.db (
rm log/log.db) because column layouts is changed. - 2022/6/12 Please replace GPS section in layout.yaml from layouts/layout-cycling.yaml because the item "Error" is deleted.
- 2022/3/7 Please install aiohttp for faster downloading of map tiles.
$ sudo apt install python3-aiohttp
or
$ sudo pip3 install aiohttp
Table of Contents
- Abstract
- Features
- Specs
- Comparison with other bike computers
- Hardware Installation
- Software Installation
- Q&A
- License
- Author
Abstract
Pi Zero Bikecomputer is a GPS and ANT+ bike computer based on Raspberry Pi Zero(W, WH, 2 W). This is the first DIY project in the world integrated with necesarry hardwares and softwares for modern bike computer. It measures and records position(GPS), ANT+ sensor(speed/cadence/power) and I2C sensor(pressure/temperature/accelerometer, etc). It also displays these values, even maps and courses in real-time. In addition, it write out log into .fit format file.
In this project, Pi Zero Bikecomputer got basic functions needed for bike computers. Next target is to add new functions which existing products do not have!
You will enjoy both cycling and the maker movement with Pi Zero Bikecomputer!
Here is detail articles in Japanese.
- I tried to make a bikecomputer, the result was pretty good
- Let's make a bikecomputer with Raspberry Pi Zero (W, WH)
Daily update at twitter (@pi0bikecomputer), and my cycling activity at STRAVA.
Features
-
Easy to make
- Use modules available at famous Maker stores.
- Assemble in Raspberry Pi ecosystems.
- Install with basic commands such as
apt-get install,pipandgitcommand.
-
Customization
- Need only modules you want to use. Pi Zero Bikecomputer detects your modules.
-
Easy to develop
-
Good balance between battery life and performance
Specs
Some functions depend on your parts.
Summary
| Specs | Detail | Note |
|---|---|---|
| Logging | Yes | |
| Sensors | Yes | |
| Positioning | Yes | A GPS module is required. |
| GUI | Yes | |
| Wifi | Yes | Built-in wifi |
| Battery life(Reference) | 18h | with 3100mAh mobile battery(Garmin Charge Power Pack) and MIP Reflective color LCD. |
Logging
| Specs | Detail | Note |
|---|---|---|
| Stopwatch | Yes | Timer, Lap, Lap timer |
| Lap | Yes | [Total, Lap ave, Pre lap ave] x [HR, Speed, Cadence, Power] |
| Cumulative value | Yes | [Total, Lap, Pre lap] x [Distance, Works, Ascent, Descent] |
| Gross | Yes | Elapsed time, gross average speed(=distance/elapsed time), gained time from average speed 15km/h(for brevet) |
| Auto stop | Yes | Automatic stop at speeds below 4km/h(configurable), or in the state of the acceleration sensor when calculating the speed by GPS alone |
| Recording insterval | 1s | Smart recording is not supported. |
| Resume | Yes | |
| Output .fit log file | Yes | |
| Upload to STRAVA | Yes | |
| Live sending | Yes | But I can't find a good dashboard service like as Garmin LiveTrack |
Sensors
USB dongle is required if using ANT+ sensors.
| Specs | Detail | Note |
|---|---|---|
| ANT+ heartrate sensor | Yes | |
| ANT+ speed sensor | Yes | |
| ANT+ cadence sensor | Yes | |
| ANT+ speed&cadence sensor | Yes | |
| ANT+ powermeter | Yes | Calibration is not supported. |
| ANT+ LIGHT | Yes | Bontrager Flare RT only. |
| ANT+ Control | Yes | Garmin Edge Remote only. |
| Bluetooth sensors | No | |
| Barometric altimeter | Yes | An I2c sensor(pressure, temperature) is required. |
| Accelerometer | Yes | An I2c sensor is required. |
| Magnetometer | Yes | An I2c sensor is required. |
| Light sensor | Yes | An I2c sensor is required. For auto backlight and lighting. |
Positioning
| Specs | Detail | Note |
|---|---|---|
| Map | Yes | Support raster map tile format like OSM. So, offline map is available with local caches. Also, raster mbtile format is supported. |
| Course on the map | Yes | A course file(.tcx) is required. |
| Course profile | Yes | A course file(.tcx) is required. |
| Cuesheet | Yes | Use course points included in course files. |
| Search Route | Yes | Google Directions API |
- Map with Toner Map
- Very useful with 2 colors displays (black and white).
-
- Map with custimized Mapbox
- Use 8 colors suitable for MIP Reflective color LCD.
-
- Course profile
-
GUI
| Specs | Detail | Note |
|---|---|---|
| Basic page(values only) | Yes | |
| Graph | Yes | Altitude and performance(HR, PWR) |
| Customize data pages | Yes | With layout.yaml |
| ANT+ pairing | Yes | |
| Adjust wheel size | Yes | Set once, store values |
| Adjust altitude | Yes | Auto adjustments can be made only once, if on the course. |
| Language localization | Yes | Font and translation file of items are required. |
| No GUI option | Yes | headless mode |
- Performance graph
-
- Language localization（Japanese)
-
Experimental functions
ANT+ multiscan
it displays three of the people around you in the order in which you caught sensors using ANT+ continuous scanning mode.
Comparison with other bike computers
-
200km ride with Garmin Edge 830 and Pizero Bikecomputer (strava activity)
-
| Items | Edge830 | Pi Zero Bikecomputer |
|---|---|---|
| Distance | 193.8 km | 194.3 km |
| Work | 3,896 kJ | 3,929 kJ |
| Moving time | 9:12 | 9:04 |
| Total Ascent | 2,496 m | 2,569 m |
Hardware Installation
Software Installation
Q&A
License
This repository is available under the GNU General Public License v3.0
Author
hishizuka (@pi0bikecomputer at twitter, pizero bikecomputer at STRAVA)