projects:sma-time
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projects:sma-time [2018/01/01 20:36] – emeryth | projects:sma-time [2018/03/03 11:14] (current) – emeryth | ||
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====== Reverse engineering the SMA-Q2/ | ====== Reverse engineering the SMA-Q2/ | ||
by [[people: | by [[people: | ||
+ | |||
+ | {{: | ||
===== Intro ===== | ===== Intro ===== | ||
- | **SMA TIME** also known as **SMA Q2** is a Chinese smartwatch similar in design and features to the Pebble Time. \\ | + | **SMA Q2** also known as **SMA TIME** 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. | + | Featuring a color Memory LCD, heart rate sensor and a NRF52832 Bluetooth SoC to drive it all. \\ |
+ | |||
+ | All the documents and interesting things are uploaded here: https:// | ||
===== Hardware ===== | ===== Hardware ===== | ||
+ | |||
+ | ==== Chips ==== | ||
+ | |||
+ | ^IC ^Description ^ Datasheet ^ | ||
+ | |NRF52832-QFAAB0| Main SoC| | | ||
+ | |LP2985 (?)| 3.3V LDO for everything| | | ||
+ | |LP2985 (?)| 3.3V LDO for heart rate sensor module| | | ||
+ | |BQ24086 (?)| Battery charger| | | ||
+ | |KX022-1020 |3-Axis acccelerometer| | | ||
+ | |PAH8002|Heart rate sensor| | | ||
+ | |GD25Q16C (?)|16Mbit SPI flash| | | ||
+ | |LPM013M126A (?)|176x176 Japan Display Color memory LCD| | | ||
==== MCU Pinout ==== | ==== MCU Pinout ==== | ||
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|P0.30 | VIBRATOR ON | | |P0.30 | VIBRATOR ON | | ||
| | | | | | | | ||
+ | |P0.15 | ACCEL INT ? | | ||
+ | |P0.16 | ACCEL POWER | | ||
|P0.17 | ACCEL SDA | | |P0.17 | ACCEL SDA | | ||
|P0.18 | ACCEL SCL | | |P0.18 | ACCEL SCL | | ||
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|P0.19 | HRM SDA | | |P0.19 | HRM SDA | | ||
|P0.20 | HRM SCL | | |P0.20 | HRM SCL | | ||
+ | |P0.22 | HRM INT? | | ||
+ | |P0.10 | HRM RESET? | | ||
|P0.31 | HRM POWER ON | | |P0.31 | HRM POWER ON | | ||
projects/sma-time.1514838989.txt.gz · Last modified: 2018/01/01 20:36 by emeryth