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ptx2
gymnasticon
JavaScript2021–2023
ptx2 / gymnasticon

gymnasticon

Make obsolete and/or proprietary exercise bikes work with popular cycling training apps like Zwift, TrainerRoad, Rouvy and more.

Science & EngineeringLearning & ReferenceHardware & Embedded
Explore on GitHubRead Hacker News discussions
2Distinct people
7Mentions
0Explicit recommenders
329GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Make obsolete and/or proprietary exercise bikes work with popular cycling training apps like Zwift, TrainerRoad, Rouvy and more.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month7 dated mentions

Observed mentions: 2021-01-07 13:54:29 UTC to 2023-04-03 17:46:16 UTC.

01232021-01-01 00:00:00 UTC to 2021-02-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 commentsJan 20212021-02-01 00:00:00 UTC to 2021-03-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2021-03-01 00:00:00 UTC to 2021-04-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2021-04-01 00:00:00 UTC to 2021-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-05-01 00:00:00 UTC to 2021-06-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2021-06-01 00:00:00 UTC to 2021-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-07-01 00:00:00 UTC to 2021-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-08-01 00:00:00 UTC to 2021-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-09-01 00:00:00 UTC to 2021-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-10-01 00:00:00 UTC to 2021-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-11-01 00:00:00 UTC to 2021-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-12-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-01-01 00:00:00 UTC to 2022-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-02-01 00:00:00 UTC to 2022-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsFeb 20222022-03-01 00:00:00 UTC to 2022-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-04-01 00:00:00 UTC to 2022-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-05-01 00:00:00 UTC to 2022-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-06-01 00:00:00 UTC to 2022-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-07-01 00:00:00 UTC to 2022-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-08-01 00:00:00 UTC to 2022-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-09-01 00:00:00 UTC to 2022-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-10-01 00:00:00 UTC to 2022-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-11-01 00:00:00 UTC to 2022-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-12-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-01-01 00:00:00 UTC to 2023-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-02-01 00:00:00 UTC to 2023-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-03-01 00:00:00 UTC to 2023-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-04-01 00:00:00 UTC to 2023-05-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsApr 2023

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Jan 20212021-01-01 00:00:00 UTC2021-02-01 00:00:00 UTC303
Feb 20212021-02-01 00:00:00 UTC2021-03-01 00:00:00 UTC101
Mar 20212021-03-01 00:00:00 UTC2021-04-01 00:00:00 UTC101
Apr 20212021-04-01 00:00:00 UTC2021-05-01 00:00:00 UTC000
May 20212021-05-01 00:00:00 UTC2021-06-01 00:00:00 UTC101
Jun 20212021-06-01 00:00:00 UTC2021-07-01 00:00:00 UTC000
Jul 20212021-07-01 00:00:00 UTC2021-08-01 00:00:00 UTC000
Aug 20212021-08-01 00:00:00 UTC2021-09-01 00:00:00 UTC000
Sep 20212021-09-01 00:00:00 UTC2021-10-01 00:00:00 UTC000
Oct 20212021-10-01 00:00:00 UTC2021-11-01 00:00:00 UTC000
Nov 20212021-11-01 00:00:00 UTC2021-12-01 00:00:00 UTC000
Dec 20212021-12-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
Jan 20222022-01-01 00:00:00 UTC2022-02-01 00:00:00 UTC000
Feb 20222022-02-01 00:00:00 UTC2022-03-01 00:00:00 UTC000
Mar 20222022-03-01 00:00:00 UTC2022-04-01 00:00:00 UTC000
Apr 20222022-04-01 00:00:00 UTC2022-05-01 00:00:00 UTC000
May 20222022-05-01 00:00:00 UTC2022-06-01 00:00:00 UTC000
Jun 20222022-06-01 00:00:00 UTC2022-07-01 00:00:00 UTC000
Jul 20222022-07-01 00:00:00 UTC2022-08-01 00:00:00 UTC000
Aug 20222022-08-01 00:00:00 UTC2022-09-01 00:00:00 UTC000
Sep 20222022-09-01 00:00:00 UTC2022-10-01 00:00:00 UTC000
Oct 20222022-10-01 00:00:00 UTC2022-11-01 00:00:00 UTC000
Nov 20222022-11-01 00:00:00 UTC2022-12-01 00:00:00 UTC000
Dec 20222022-12-01 00:00:00 UTC2023-01-01 00:00:00 UTC000
Jan 20232023-01-01 00:00:00 UTC2023-02-01 00:00:00 UTC000
Feb 20232023-02-01 00:00:00 UTC2023-03-01 00:00:00 UTC000
Mar 20232023-03-01 00:00:00 UTC2023-04-01 00:00:00 UTC000
Apr 20232023-04-01 00:00:00 UTC2023-05-01 00:00:00 UTC101

What Hacker News says

7 sources
ptx2·Apr 3, 2023
Location: USA near water and/or mountains (CA/NY/CO/OR/WA/??) Remote: Preferred Willing to relocate: Yes Technologies: Python, C, C++, JavaScript, TypeScript, Node, Ruby, Rails, Django, Express, React, PostgreSQL, Linux, Bash, AWS, HTML, CSS. Trying to find time to play with Go and Rust. Resume/CV: 15 years experience as a full-stack engineer (web, native, frontend/backend, firmware, devops). Contact for resume. Email: ptx2 at-sign ptx2 dot net Product-minded full-stack engineer with 15 years experience. Recent technical write-up and open-source project I made that reached #1 on HackerNews: https://ptx2.net/posts/unbricking-a-bike-with-a-raspberry-pi... https://github.com/ptx2/gymnasticon Some things I've designed/built/launched/maintained professionally: web frontend/backends, realtime interactive graphics apps, data
Read the rest
visualizations, computer vision apps, firmware, reverse engineering, video/image processing, apis, api integrations (payments/social/data), distributed systems, linux sysadmin, refactoring/maintaining legacy systems, managing small engineering teams, remote work, customer facing work. Some areas of interest: the outdoors, health and fitness, art, music, environment, games, human computer interaction, product design, ui/ux, embedded/iot devices, privacy, security, networking, optimization, unusual companies/products, web, linux. Looking for interesting software engineer or tech co-founder/director/advisor opportunities!
In Ask HN: Who wants to be hired? (April 2023)
ptx2·May 3, 2021
Location: USA near water and/or mountains (CA/NY/CO/OR/WA/??) Remote: Preferred Willing to relocate: Yes Technologies: Python, C, C++, JavaScript, TypeScript, Node, Ruby, Rails, Django, Express, React, PostgreSQL, Linux, Bash, AWS, HTML, CSS. Trying to find time to play with Go and Rust. Resume/CV: 15 years experience as a full-stack engineer (web, native, frontend/backend, firmware, devops). Contact for resume. Email: ptx2 at-sign ptx2 dot net Product-minded full-stack engineer with 15 years experience. Recent technical write-up and open-source project I made that reached #1 on HackerNews: https://ptx2.net/posts/unbricking-a-bike-with-a-raspberry-pi... https://github.com/ptx2/gymnasticon Some things I've designed/built/launched/maintained professionally: web frontend/backends, realtime interactive graphics apps, data
Read the rest
visualizations, computer vision apps, firmware, reverse engineering, video/image processing, apis, api integrations (payments/social/data), distributed systems, linux sysadmin, refactoring/maintaining legacy systems, managing small engineering teams, remote work, customer facing work. Some areas of interest: the outdoors, health and fitness, art, music, environment, games, human computer interaction, product design, ui/ux, embedded/iot devices, privacy, security, networking, optimization, unusual companies/products, web, linux. Looking for interesting software engineer or tech co-founder/director/advisor opportunities!
In Ask HN: Who wants to be hired? (May 2021)
ptx2·Mar 1, 2021
Location: USA near water and/or mountains (CA/NY/CO/OR/WA/??) Remote: Preferred Willing to relocate: Yes Technologies: Python, C, C++, JavaScript, TypeScript, Node, Ruby, Rails, Django, Express, React, PostgreSQL, Linux, Bash, AWS, HTML, CSS. Trying to find time to play with Go and Rust. Resume/CV: 15 years experience as a full-stack engineer (web, native, frontend/backend, firmware, devops). Contact for resume. Email: Link on https://ptx2.net/ Product-minded full-stack engineer with 15 years experience. Recent technical write-up and open-source project I made that reached #1 on HackerNews: https://ptx2.net/posts/unbricking-a-bike-with-a-raspberry-pi... https://github.com/ptx2/gymnasticon Some things I've designed/built/launched/maintained professionally: web frontend/backends, realtime interactive graphics apps, data
Read the rest
visualizations, computer vision apps, firmware, reverse engineering, video/image processing, apis, api integrations (payments/social/data), distributed systems, linux sysadmin, refactoring/maintaining legacy systems, managing small engineering teams, remote work, customer facing work. Some areas of interest: the outdoors, health and fitness, art, music, environment, games, human computer interaction, product design, ui/ux, embedded/iot devices, privacy, security, networking, optimization, unusual companies/products, web, linux. Looking for interesting software engineer or tech co-founder/director/advisor opportunities!
In Ask HN: Who wants to be hired? (March 2021)
ptx2·Feb 1, 2021
Location: USA near water and/or mountains (CA/NY/CO/OR/WA/??) Remote: Preferred Willing to relocate: Yes Technologies: Python, C, C++, JavaScript, TypeScript, Node, Ruby, Rails, Django, Express, React, PostgreSQL, Linux, Bash, AWS, HTML, CSS. Trying to find time to play with Go and Rust. Resume/CV: 15 years experience as a full-stack engineer (web, native, frontend/backend, firmware, devops). Contact for resume. Email: https://ptx2.net/ Product-minded full-stack engineer with 15 years experience. Recent technical write-up and open-source project I made that reached #1 on HackerNews: https://ptx2.net/posts/unbricking-a-bike-with-a-raspberry-pi... https://github.com/ptx2/gymnasticon Some things I've designed/built/launched/maintained professionally: web frontend/backends, realtime interactive graphics apps, data visualizations, c
Read the rest
omputer vision apps, firmware, reverse engineering, video/image processing, apis, api integrations (payments/social/data), distributed systems, linux sysadmin, refactoring/maintaining legacy systems, managing small engineering teams, remote work, customer facing work. Some areas of interest: the outdoors, health and fitness, art, music, environment, games, human computer interaction, product design, ui/ux, embedded/iot devices, privacy, security, networking, optimization, unusual companies/products, web, linux. Looking for interesting software engineer or tech co-founder/director/advisor opportunities!
In Ask HN: Who wants to be hired? (February 2021)
kcmastrpc·Jan 7, 2021
Nice work. In September / October of last year I was inspired by someone else doing this and showing off they could Zwift with their PTON bike. After some digging around, and figuring out how they encoded the data it was trivial to implement this in a project that was used to keep Flywheel Bikes working. https://github.com/ptx2/gymnasticon The changes I introduced which now include support for the Peloton can be found here: https://github.com/ptx2/gymnasticon/pull/12
In Decoding the Peloton

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