Th3maz1ng/W800_Smart_Watch
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Updated the readme document as some parts were not correct anymore

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Th3maz1ng 2023-09-24 13:07:47 +02:00
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@ -30,22 +30,22 @@ The W800 is a pretty interesting chip with impressive characteristics for its pr
* A magnetometer (QMC5883L) used by the compass app for example
* An accelerometer (BMA456) to get wrist tilt detection (to wake the screen up), step counts, activity detection (standing, walking and running) and more.
* A pressure and temperature sensor (BMP280) used by the altimeter app for example.
* A heart rate sensor (MAX30102) is planned to be added (connection pads on the PCB, no driver written).
* A heart rate sensor (MAX30102).
#### Screen and Actuators :
* A 1.28 inch touch screen is being used on the watch (GC9A01 screen controller).
* A vibration motor to notify the user of events.
* No physical buttons as everything can be done using the graphical interface.
#### Connectivity :
* The watch has BLE (4.2) connectivity which is used to connect to a phone using the GadgetBridge app to :
* control music playback - **to implement**
* control music playback
* find my phone feature
* report its battery level
* report step counts - **to implement**
* display received text messages, emails and calls - **to implement**
* show the weather forecast for the next 6 hours or so - **to implement**
* WiFi is also available but not used yet because I didn't find any good use case for it. It is also very power hungry.
* WiFi is also available but not used yet because I didn't find any good use case for it. It is also quite power hungry.
#### Battery and Battery life:
* The battery currently used in this version of the watch is a 6mm x 25mm x 35mm (602535) single cell 500 mAh lipo battery (had one laying around).
* The battery currently used in this version of the watch is a 6mm x 25mm x 35mm (602535) single cell 600 mAh lipo battery (had one laying around).
* Using the current battery, expected battery life is :
* ~ 5 days in sleep mode.
* ~ 9 hours when continuously connected to BLE with the phone (I may be able to slightly improve power consumption in BLE mode - working on it).
@ -54,7 +54,7 @@ The W800 is a pretty interesting chip with impressive characteristics for its pr
* The size of the watch's case is as follow :
![](http://82.64.196.164/images/git/W800_casing_size.png)
* The thickness of the watch will be reworked in the next version of the casing, the goal is to shave 3 to 4 mm off to reach 12 to 13 mm.
* The watch weighs around 50 grams with the 500 mAh battery and the straps attached to it.
* The watch weighs around 50 grams with the 600 mAh battery and the straps attached to it.
* It also has a docking station designed for it which is used to :
* Recharge the W800 Smart Watch by simply putting the watch on it. The connection between the docking and the watch is done through a magnetic 4 pin connector.
* Flash a new firmware to the watch. No extra programming hardware is required, only the docking is needed.
@ -128,7 +128,7 @@ make flash
* Heart Rate and SpO2 sensor : **Max30102** I2C addr : 0x57 7 bit address.
## Power source :
* A single ~ 400 mAh cell lipo battery.
* A single ~ 600 mAh cell lipo battery.
* A charge/discharge controller stage :
* TP4056
* DW01A + 8205A
@ -200,16 +200,18 @@ using a magnetic 4 pin plug.
* GC9A01 in 4-line serial mode (8 bits) with D/C pin <-- **this one is used**.
* Supported LCD touch screen :
* CST816D I2C capacitive touch ic.
* Four screens designed and working with LVGL :
* 1 watch face based on a casio watch.
* 1 menu screen with a list of icons.
* 1 setting screen with basic settings (date and time + display brightness) (work in progress).
* 1 compass application using the QMC5883L.
* Five screens designed and working with LVGL :
* A watch face based on a casio watch.
* A menu screen with a list of icons.
* A setting screen with basic settings (date and time + display brightness) (work in progress).
* A compass application using the QMC5883L.
* A find my phone screen which makes the device ring and vibrate (must be connected to watch using BLE through the GadgetBridge app).
* Debug UART on PB_2 (**output only**)
* Sensors/Actuators :
* QMC5883L driver working
* BMA456 driver working
* BMP280 driver working (temperature + pressure + altitude)
* MAX30102 driver working
* Battery voltage sense using ADC is working
* Vibration motor controlled by PWM working
* Update the W800 SDK from version 1.00.08 to version 1.00.10 released in January of 2023.
@ -226,19 +228,19 @@ using a magnetic 4 pin plug.
* [ ] Implement a good algorithm to handle adaptiv MCU clock
to save power
* Drivers:
* [ ] Write/port the MAX30102 Heart Rate Monitor driver to the project.
* [X] Write/port the MAX30102 Heart Rate Monitor driver to the project.
* [ ] Add a wake up alarm app (using the vibration motor).
* [X] Add BLE functionality.
## Achieved power consumption recap:
(Need to work on sleep current :-( )
| Mode | Current draw | Estimated battery life (450 mAh lipo) |
| Mode | Current draw | Estimated battery life (600 mAh lipo) |
|--------------------------|--------------|---------------------------------------|
|Active (40Mhz clk)<br>(No BLE / No WiFi) |~52 mA | ~8 hour |
|Active (240Mhz clk)<br>(No BLE / No WiFi) |~72 mA | ~6 hour |
|Sleep |~4.5 mA |~4 days and 4 hours |
|Standby |~1.8 mA |~10 days and 15 hours |
|Active (40Mhz clk)<br>(No BLE / No WiFi) |~52 mA | ~11 hour |
|Active (240Mhz clk)<br>(No BLE / No WiFi)|~72 mA | ~8 hour |
|Sleep |~4.5 mA |~5 days and 12 hours |
|Standby |~1.8 mA |~13 days and 15 hours |
## Some screenshots of the achieved visuals currently running on the watch using lvgl :
![](http://82.64.196.164/images/git/watch_graphics.png)
@ -257,10 +259,11 @@ to save power
## And the watch running :
![](http://82.64.196.164/images/git/W800_running.png)
### **Almost everything works :**
### **Everything works :**
* BMA456 ✓
* BMP280 ✓
* QMC5883L ✓
* MAX30102 ✓
* Screen + touch panel ✓
* CH340E for chip programming ✓
* Vibration motor ✓
@ -270,7 +273,6 @@ to save power
* DW01A chip not driving the double N mosfet as expected (when plugging a battery, the watch doesn't start without beeing plugged into the charger at least once).
Thought it might be a capacitor value issue, replaced C12 with a 82nf and 68nf caps, but it did not solve the problem :(.
**TLDR : after installing the battery, the watch might need to be plugged to it's charger at least once to start up**
* The new battery should have a size of **26.8x26.8 mm** maximum : 602626 (400 mAh) would be a good choice.
## **Next steps :**
* Write and release a usable firmware for every day use. - **In active dev**