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Casio Smartwatch

A low power, bluetooth smartwatch made with a Casio watch casing.

huberttechhubert.tech
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A smartwatch I've been building using an nrf5340 inside of a Casio W800H. Features: - ISP2053 as the microcontroller - BMA400 accelerometer - BMP280 - LIS2MDLTR magnetometer - LS010B7DH04 memory-in-pixel display - reuses the buzzer on the W800H backplate - emulates a PineTime watch to use GadgetBridge - music control via GadgetBridge - weather via GadgetBridge - Apple notifications coming soon! - npm1100 battery charger - lipo battery: 2 day battery life but I haven't optimized the firmware yet. Firmware: I started with the Nordic nrf5 SDK and then ported it over to ZephyrOS. I started with an nrf52840 (HJ-840) but the nrf5340 was too tempting. Planning on open sourcing it soon.

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hubert.tech wrote 02/05/2023 at 01:54 • point

thanks! I wanted to use and f-91w but I couldn't find a low power display small enough. I'm planning on integrating the ANCS service from https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/bluetooth_services/services/ancs_client.html .

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baukespoelstra wrote 02/05/2023 at 00:29 • point

this is so cool! I actually wanted to try this with my casio f-91w. How will you be doing apple notifications? 

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