lilygo®ttgo t-wristband & micropython.
This is an implementation of a micropython clock for the lilygo®ttgo t-wristband.
The program is suitable for the version with the esp32 chip and the mpu9250 gyroscope.
The version with a different gyroscope has completely different pins and you will have to modify the program yourself.
Super short video: https://youtu.be/rZkwvvz0KFw
I used a C video driver from this author: https://github.com/ccccmagicboy/st7735_mpy
You need to compile the micropython along with this driver.
Or you can take in this repository the already compiled firmware.bin
I took the font files along with the display driver.
The gyroscope files (mpu9250.py, mpu6500.py, ak8963.py) I took from here: https://github.com/tuupola/micropython-mpu9250
In mpu6500.py changed the default address to 0x69.
The pcf8563.py clock driver took from here: https://github.com/lewisxhe/PCF8563_PythonLibrary
With the help of one button and combinations of long and short presses, you can set the time, date.
Holding the button for 2-4 seconds turns on the calendar, and for more than 5 seconds transfers it to the menu.
Updated.
I corrected pcf8563.py in the datasheet for the range of days of the week 0-6, and the author, for some reason, used 1-7.
Added a compass. The compass must be calibrated for your area, otherwise it will show the weather on Mars. To calibrate, you need to select 'Calibrate' in the menu and smoothly, without jerks, rotate the bracelet along all possible axes for a minute. (As if you are winding a ball of wool and you need to wind it evenly over the entire area).
Let me remind you that you need to flash firmware.bin, and then copy 9 files to the device (vga2_bold_16x32.py, vga2_8x16.py, pcf8563.py, mpu9250.py, mpu6500.py, main.py, calib.py, boot.py, ak8963.py)
Updated.
- Updated the firmware from micropython v.1.13 to v.1.23. The result was a decrease in consumption in deep sleep by more than 2 times. Now the consumption in deep sleep is 1 mA. My copy with a 105 mAh battery lasted 4.5 days.
- I replaced the display driver with this one https://github.com/russhughes/st7789_mpy since the old driver is not supported by the author.
- Added a simple Wi-Fi scanner that shows the names of the nearest access points and their signal strength.
- Now there is no need to copy files, since everything is packaged in the firmware. Just flash firmware.bin