A DIY Watch You Can Actually Wear
LILYGO's T-Watch Ultra is making waves by offering a durable, hackable smartwatch experience for hardware enthusiasts, breaking away from proprietary 'walled gardens' with its ESP32-S3 core and rich feature set. This device is gaining traction for combining open-source programmability with practical robustness, as evidenced by quickly sold-out pre-orders. However, the Hacker News community keenly debates its 'DIY' designation and scrutinizes its power consumption given the chosen microcontroller.
The Lowdown
The LILYGO T-Watch Ultra aims to bridge the gap between highly customizable, open-source smartwatches and the practical durability of commercial offerings. While many DIY smartwatches sacrifice ruggedness for hackability, the T-Watch Ultra sports an IP65-rated case, making it resistant to rain and dust, a significant upgrade for hardware hackers. This new device positions itself as a robust platform for experimentation, featuring a comprehensive suite of sensors and communication modules that go beyond typical consumer smartwatches.
Key features of the T-Watch Ultra include:
- Core Processor: An ESP32-S3 microcontroller with a dual-core Tensilica LX7 CPU, 16MB flash, and 8MB PSRAM, suitable for complex applications and edge AI.
- Display: A 2.01-inch AMOLED panel with 410x502 resolution and capacitive touch.
- Power: A substantial 1,100mAh battery for extended use.
- Connectivity: Wi-Fi, Bluetooth 5.0 LE, and a Semtech SX1262 LoRa transceiver for long-range, low-power communication (e.g., Meshtastic).
- Sensors & Modules: A u-blox MIA-M10Q GNSS module for accurate location, a Bosch BHI260AP smart sensor for motion-based AI, NFC, RTC, vibration motor, and microSD card slot.
- Audio: Built-in microphone and MAX98357A amplifier.
- Development: Supports Arduino IDE, MicroPython, and ESP-IDF, with a USB Type-C port for easy programming.
With its impressive array of hardware and open development environment, the T-Watch Ultra caters to makers looking for a powerful and resilient platform for wearable projects. Its pre-order price of $78.32 and rapid sell-out indicate strong interest within the enthusiast community.
The Gossip
Defining DIY: Distinction or Distortion?
Commenters debated the use of 'DIY' in the title, arguing that a pre-assembled, programmable watch like the T-Watch Ultra is more 'programmable' than 'DIY.' True DIY, for some, implies building from scratch, including PCB design and 3D printing cases. Others acknowledged that 'DIY' exists on a spectrum, with kits also counting, but emphasized the difference between assembling components and creating them.
Power Predicaments and Chipset Choices
A significant point of discussion revolved around the T-Watch Ultra's choice of the ESP32-S3 microcontroller. Critics questioned its suitability for a smartwatch due to potential high power consumption, especially when communicating regularly, suggesting alternatives like Nordic Semi or ST Micro for better low-power performance. The article's omission of battery life benchmarks was also noted, as this is a crucial factor for wearable devices.
Feature Fantasies and Open Alternatives
Many users shared their ideal smartwatch feature sets, often highlighting a desire for specific health monitoring (like O2 sensing), long battery life (weeks, not days), and robust waterproofing, while shunning 'anti-features' like cellular or excessive AI. The discussion also veered into the broader landscape of open-source smartwatches, with mentions of projects like Sensor Watch, Ollee, PineTime Pro, and a perennial yearning for an open-source alternative to Garmin's sports watches.