Resources for reverse engineering generic Nordic Semiconductor nRF52832 and nRF51822 ARM Cortex based Smartwatches and activity trackers. These devices are my primary development platform for rapid prototyping of wearables. You get a nRF52832 ARM Cortex M4 SoC MCU, color OLED display, accelerometer, HR LED, HR photodetector, vibration motor, LiPo battery, battery charger, injection molded enclosure and strap for $30-$40. Using these devices as a development platform means faster, more ambitious prototyping - I treat them as disposable and have personally destroyed more than 20 over the past two years. These devices can be programmed using nRF5X ArduinoCore, ARM Mbed or directly with the Nordic nRF5X SDK using ARM Keil or the GNU ARM Embedded GCC toolchain. Devices can be flashed using nRFgo Studio, nRFjprog Win , nRFjprog Linux , nRFjprog Mac , OpenOCD and ArduinoCore Arduino IDE Plugin.
NOTE: I will try to keep purchase links updated but one can only do so much. DuckDuckGo/Google search is your friend. I have worked with the X9 more than any other device and have placed X9 related files in the root of this repo. I am still in the process of hacking components for other listed devices, and you are of course welcome to contribute!
-
Follow steps from this github to :
- install the Arduino
- install the new board with board manager
- Add the core by cloning it in the hardware folder
-
copy Wearable-nRF52-X9. lines from
Documents\Arduino\hardware\sandeepmistry\nRF5\boards.txtintoArduino\packages\sandeepmistry\hardware\nRF5\0.5.1\boards.txt -
copy the X9 variant directory from
X9-nrf52832-activity-tracker\Firmware\sandeep_arduinocore_variant\Wearable-nRF52-X9into your core variants directoryArduino\packages\sandeepmistry\hardware\nRF5\0.5.1\variants -
copy libraries from
common\librariesintoArduino\libraries -
Hackaday example
git clone https://github.com/lexus2k/ssd1306.gitinto the Arduino library directory
- cloning the mentionned repo in the issue then compiling nrf52_X9Project_HACKADAY.ino:
Arduino\libraries\ssd1306\src/ssd1306_hal/arduino/io.h:45:27: fatal error: avr/sleep.h: No such file or directory - looks like the version patched for the nRF52 is not available
https://www.ebay.com/itm/X9Pro-Bluetooth-Smart-Watch-Heart-Rate-Monitor-Bracelet-Fitness-Activity-Tracker/372268058270 https://www.ebay.com/itm/LEMFO-X9-Pro-Sport-Bracelet-Activity-Tracker-Blood-Pressure-Band-For-Android-iOS/282783676442 https://www.ebay.com/itm/X9Pro-Sports-Smart-Bracelet-Activity-Tracker-Calorie-Counter-Heart-Rate-Monitor/192510003251 http://www.globalsources.com/gsol/I/Smart-bracelet/p/sm/1153444500.htm https://www.amazon.com/Gentman-Colorful-Wristwatch-Pressure-Smartwatch/dp/B074J2DLBT/ref=sr_1_7 https://de.aliexpress.com/item/New-Original-X9-PRO-Smart-Watch-Sport-Heartrate-Blood-Pressure-Oxygen-Oximeter-Sport-Bracelet-Watch-intelligent/32823945075.html
https://www.aliexpress.com/item/N68-Smart-Bracelet-Blood-Pressure-Dynamic-Heart-Rate-Activity-Fitness-Tracker-Smart-Wristband-Pedometer-Waterproof-Smart/32861208616.html https://www.aliexpress.com/item/Langtek-N68-Smart-Band-Bluetooth-Bracelet-Touch-Screen-Heart-Blood-Pressure-Monitor-Smart-Band-Wristband-Sport/32856425541.html https://www.ebay.com/itm/LEMFO-N68-Smart-Watch-Band-Heart-Rate-Activity-Tracker-Wristband-For-Andriod-iOS/312017440612 https://www.ebay.com/itm/Lemfo-N68-Bluetooth-Waterproof-Activity-Tracker-Heart-Rate-Pedometer-Smart-Band/282777153434 https://www.amazon.com/Bracelet-Activity-Waterproof-Bluetooth-Wireless/dp/B078W28FYH/ref=sr_1_1
https://www.aliexpress.com/item/Hot-Smart-Watch-CK12-Graphene-ECG-Blood-Pressure-Heart-Rate-Smart-Bracelet-Sport-Watch-Pedometer-Call/32830280936.html https://www.ebay.com/itm/CK12-Smart-Wrist-Watch-ECG-Heart-Rate-Blood-Pressure-Monitor-Sleep-Waterproof/273154151326 https://www.ebay.com/itm/CK12-ECG-Blood-Pressure-Heart-Rate-Smart-Bluetooth-Bracelet-Matte-for-Android/372178718406 https://www.aliexpress.com/item/Teamyo-CK12-Graphene-ECG-Smart-Band-Oxygen-Pressure-Monitor-Sport-Smart-Wristband-Waterproof-Fitness-Tracker-Bluetooth/32862762634.html
https://www.aliexpress.com/item/YurKem-ID107-Plus-HR-Smart-Band-Bluetooth-4-0-Answer-Call-GPS-Smart-Bracelet-Heart-Rate/32811734484.html https://www.aliexpress.com/item/Smartch-ID107-Plus-HR-Bluetooth-Smart-Bracelet-Heart-Rate-Monitor-Multi-sports-Cardio-Fitness-Guided-Breathing/32850167271.html https://www.ebay.com/itm/ID107-Plus-IP67-SmartWatch-Sleep-Activity-Tracker-Fitness-Heart-Rate-Call-SMS/253195626491 https://www.ebay.com/itm/Fitness-Tracker-JELEGANT-ID107-Plus-HR-Smart-Bracelet-Activity-Tracker-Hear/292493668861
https://www.aliexpress.com/item/HL-2017-M3-Sports-Smart-Watch-Heart-Rate-Calories-Wrist-Watch-Smart-Bracelet-Watch-ma29-Levert/32804495965.html https://www.aliexpress.com/store/product/Smart-Watch-Wrist-Band-Blood-Pressure-Heart-Rate-Monitor-M3-Bracelet-Sport-Activity-Clock-Wristband-Bluetooth/1961463_32803053240.html http://techshopstore.com/products/m3-ip67-life-waterproof-sport-smart-wristbands-heart-rate-calories-wrist-watch-smart-bracelet-watch-0-69-inch-hd-for-ios-android/ https://www.amazon.com/Aurorax-Fitness-Waterproof-Tracker-Monitor/dp/B0765RG26M/ref=sr_1_5
https://www.aliexpress.com/item/ID107-Smart-Band-Smartband-Heart-Rate-Monitor-Wristband-Fitness-Flex-Bracelet-for-Android-iOS-PK-xiomi/32812006895.html https://www.aliexpress.com/item/Waterproof-Heart-Rate-Monitor-Smart-Band-ID107-Fitness-Tracker-Smart-Bracelet-Watch-OLED-Smart-Wristband-for/32790006100.html https://www.ebay.com/itm/ID107-Heart-Rate-Smart-Watch-Bracelet-Fitness-Activity-Tracker-Sleep-Monitor-NEW/182852498159 https://www.ebay.com/itm/ID107-Bluetooth-Smart-Watch-Fitness-Activity-Tracker-Pedometer-Calories-Counter/132232187828 https://www.amazon.com/Bluetooth-Bracelet-Monitor-Wristband-Smartphone/dp/B01DF2H732/ref=sr_1_1
Special thanks to all the members of the smartwatch slack group (@rogerclarkmelbourne, @goran-mahovlic, @micooke, @olivier, @marvin, @floe, the nRF51822 smart watch Gitter Lobby, to @goran-mahovlic and @rogerclarkmelbourne for the KX022 accelerometer driver, to @sandeepmistry for the awesome ArduinoCore Nordic SDK wrapper and Lampert for his awesome light saber WebGL 3D model. Roger Clark in particular has done a lot of cool stuff with Nordic activity trackers, check out his work!