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README.MD

English | 中文

The code bin will demonstrate the basic functionality of T-Watch, including all on-board chips from T-Watch, using the latest lvgl6.0 as the display graphics framework.

Characteristics:

  1. The library already contains all the hardware drivers for T-Watch
  2. Using TFT_eSPI as the display driver, you can directly call TFT_eSPI through the construction object.
  3. Using lvgl 6.0 as the display graphics framework, the driver method has been implemented, you only need to call lvgl api according to your own needs.
  4. For the use of lvgl please refer to lvgl docs

Installing

  • Download a zipfile from github using the "Download ZIP" button and install it using the IDE ("Sketch" -> "Include Library" -> "Add .ZIP Library..."
  • Clone this git repository into your sketchbook/libraries folder. For more info, see https://www.arduino.cc/en/Guide/Libraries

How to find the sample program

  • In the Arduino board select TTGO T-Watch
  • In the Arduino File -> Examples -> TTGO T-Watch

Note

Precautions:

  • Since Twatch uses a special IO as the SD interface, please remove the SD card when downloading the program.

About power consumption:

  • Currently off the screen, turn off WiFi, Bluetooth and other peripherals consume about 4mA (non-deep sleep), turn on the screen power, do not turn on WiFi, Bluetooth and other peripherals around 65mA, please refer to example -> SimpleWatch for the specific code.

    Off screen power consumption

    Open screen power consumption

Architecture diagram

Core Board Pinout

TFT

ESP32 Core GPIO5 GPIO19 GPIO18 GPIO27
ST7789V CS MOSI SCLK DC

Button

ESP32 Core GPIO36
User Button Button

Sensor

ESP32 Core GPIO21 GPIO22 GPIO39
BMA423 SDA SCL Interrupt

PMU

ESP32 Core GPIO21 GPIO22 GPIO35
AXP202 SDA SCL Interrupt

RTC

ESP32 Core GPIO21 GPIO22 GPIO37
PCF8563 SDA SCL Interrupt

TOUCH

ESP32 Core GPIO23 GPIO32 GPIO38
FT6236U SDA SCL Interrupt

TF Card

ESP32 Core GPIO13 GPIO15 GPIO2 GPIO14
TF Card CS MOSI MISO SCLK

Bottom plate Pinout

Standard

ESP32 Core GPIO33 GPIO25 GPIO21 GPIO22
Standard Motor Speaker SDA SCL
  • Onboard SD card slot

SIM800L

ESP32 Core GPIO14 GPIO15 GPIO4 GPIO33 GPIO34
SIM800L RST PWKEY BOOST_CTRL TX RX
  • No onboard SD card slot

MPR121

ESP32 Core GPIO21 GPIO22
MPR121 SDA SCL
  • Onboard SD card slot

S7XG_Lora & GPS

ESP32 Core GPIO33 GPIO34
S7XG_Lora TX RX
  • Onboard SD card slot

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