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OpenTrailPaper is open-source firmware for the LilyGO T5S3 4.7" E-Paper PRO board, turning it into a DIY e-paper bike computer. It supports offline maps, GPX route navigation, FIT file recording, Bluetooth sensor connectivity, and can operate independently without a phone during rides. Companion apps for iOS and Android facilitate route planning, file transfers, settings management, and firmware updates.
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interesting if you like tinkering more than shopping. the e paper screen and open firmware are the draw, but the bare board status means this is closer to a project bike than an off the shelf computer.
AI-generated product observations. Not a firsthand user review.
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...
evrimoztamur · Imported from Show HN
Wow. You managed to receive ANT+ via BLE hardware?! I didn't know these two protocols were so similar.
kccqzy · Imported from Show HN
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.
dinan · Imported from Show HN
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
tuchsen · Imported from Show HN
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.
pilina · Imported from Show HN
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