LILYGO’s T-Watch Ultra is an IP65-rated ESP32-S3 smartwatch with LoRa, GNSS, NFC, and AMOLED display, pre-ordering at $78.32.
Key Takeaways
ESP32-S3 dual-core LX7 at 240MHz, 16MB flash, 8MB PSRAM, plus vector AI acceleration – meaningfully more capable than typical hobbyist wearables.
Semtech SX1262 LoRa transceiver enables Meshtastic nodes and off-grid messaging, a rare capability for any smartwatch form factor.
IP65 rating closes the main practical gap between DIY wearables and commercial hardware; rain and dust are no longer a disqualifier.
Full Arduino, MicroPython, and ESP-IDF support keeps the development workflow identical to standard ESP32 projects.
u-blox MIA-M10Q GNSS, Bosch BHI260AP motion AI, ST25R3916 NFC, and MAX98357A audio are all present – this is closer to a dev board with a strap than a stripped-down toy.
Hacker News Comment Review
Pre-orders for all three variants sold out quickly, suggesting real demand despite limited mainstream visibility.
Commenters see the open-source Garmin problem as still unsolved: accurate running and cycling metrics require firmware depth that ESP32-class hardware alone does not deliver, regardless of sensor count.
Newer Garmins are encrypted and signed, closing the reverse-engineering path that earlier models allowed; the T-Watch Ultra’s open SDK is the realistic alternative for the hacking community.
Notable Comments
@ck2: “have wished for decades now there was an open-source Garmin on the level of Cyanogenmod” – frames T-Watch Ultra against a long-standing unsolved problem in open fitness hardware.
