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Show HN: Open-Source eInk Bike Computer

https://opentrailpaper.com
58•stingrae•1h ago•14 comments

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5•beeswaxpat•21h ago•1 comments
Open in hackernews

Show HN: Open-Source eInk Bike Computer

https://opentrailpaper.com
52•stingrae•1h ago
Hey all, i just launched my Eink Bike computer project and think it is cool.

Another tidbit, in the crazy things that AI has done... It has helped create a ANT (common sensor wireless protocol used in workout/biking) implementation for ESP32 by messing around with undocumented registers: https://github.com/RaemondBW/esp32-ant

Comments

arpanghoshal07•27m ago
great!
evrimoztamur•26m ago
I can't imagine using this in the Netherlands with random rain. The tradeoffs are hard to accept, wondering how it looks and performs in various weather conditions, and if a physical buttoned shell is worth it...
kccqzy•26m ago
Wow. You managed to receive ANT via BLE hardware?! I didn't know these two protocols were so similar.
stingrae•14m ago
yes. they luckily the same phy, 1 Mbit/s GFSK modulation.
dinan•23m ago
Does this work well in direct sunlight? I know a lot of e-paper panels struggle to refresh in strong sunlight. The waveshare panels look very faded if they update while exposed to UV.
stingrae•12m ago
i have ridden with this unit over five hundred miles and not had any issues. though SF Bay Area summers arent as tough as other places.
tuchsen•20m ago
Hey this looks neat, I’ve been thinking on trying something similar. I’ve not encountered the ANT protocol, what bike ya using? Is it a higher level thing that your display is giving you, or something your controller uses? I know Bafang uses CAN protocols in their newer e-bike systems and a lot of manufacturers (especially Chinese) use a proprietary UART protocol to stitch things together on the cheaper end.

The mess of different implementations makes it really hard to hack on and share this kinda stuff.

AI does make it really easy to figure out these protocols now so that’s nice I guess. I just flipped my bike upside down and hooked up a logic analyzer and it took LLM no time to figure it out… it is really impressive

monknomo•8m ago
ant+ is a garmin protocol that is very common with fitness gadgets and in the bike world. It's a bit like bluetooth, but lower energy usage.
Lucasoato•19m ago
Any open source GPS locator for bikes?
pilina•16m ago
Battery of my Cubot King Kong Mini is slowly dying. I use it with OpenTracks to record my commutes and use as bikecomputer and sometimes Osmand+ for offline navigation. I am searching for alternative, which needs to be waterproof and cheap (my commutes luckily includes downhill trails sometimes - I dont want to break expensive device). The title gave me high hopes, but I suppose I need to keep searching.
dumbmachine•13m ago
Wow, this is really cool. I really needed something for my neo retro build, this might just fit the bill.
maxrev17•13m ago
Insane! Quality on the ANT too!
memoryfault•7m ago
I love this. How do you house & secure your lily on your bike?