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Spectra is a customizable, JavaScript ESP32 smartwatch
Spectra is a JavaScript-based hackable smartwatch based on the ESP32-S3 WiFi and Bluetooth microcontroller that aims to offer the quality of high-end
According to the maker, Spectra is not bound to be fully open-source, since the project uses “external proprietary code [they] aren’t allowed to share.” They plan to publish Arduino libraries and hardware design files, but there is no live GitHub repository yet. MCU – ESP32-S3 SoC, dual-core XTensa LX7 @ up to 240 MHz; 512KB SRAM; Integrated 2.4GHz Wi-Fi and BLE Co-processor – Nordic Semiconductor nRF52832 ARM Cortex-M4F @ 64 MHz with 512KB Flash, 64KB RAM, Bluetooth 5.4 LE connectivity Memory – 8MB RAM Storage – 32MB flash, microSD card slot (supports up to 512GB) Display – 368 x 448 OLED display Sensors Magnetic encoder Magnetometer Gyroscope & accelerometer PPG (photoplethysmogram) sensor Optional add-ons include micro SD cards, a watch box, and stainless steel housing.
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