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projects:sma-time

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Reverse engineering the SMA-Q2/SMA-Time smartwatch

by emeryth (emeryth at hackerspace.pl)

Intro

SMA TIME also known as SMA Q2 is a Chinese smartwatch similar in design and features to the Pebble Time.
Featuring a color Memory LCD, heart rate sensor and a NRF52832 Bluetooth SoC to drive it all.

Hardware

MCU Pinout

Pin Description
P0.02 LCD SCLK
P0.03 LCD SI
P0.05 LCD SCS
P0.06 LCD EXTCOMIN
P0.07 LCD DISP
P0.04 Battery voltage measurement (x0.25 divider)
P0.08 BACKLIGHT ON
P0.09 BUTTON BACK
P0.27 BUTTON UP
P0.28 BUTTON OK
P0.29 BUTTON DOWN
P0.11 FLASH MISO
P0.12 FLASH CS
P0.13 FLASH MOSI
P0.14 FLASH CLK
P0.25 UART RX
P0.26 UART TX
P0.30 VIBRATOR ON
P0.17 ACCEL SDA
P0.18 ACCEL SCL
P0.19 HRM SDA
P0.20 HRM SCL
P0.31 HRM POWER ON
projects/sma-time.1514838989.txt.gz · Last modified: 2018/01/01 20:36 by emeryth