# TTGO-T-Watch

**Repository Path**: egg90/TTGO-T-Watch

## Basic Information

- **Project Name**: TTGO-T-Watch
- **Description**: No description available
- **Primary Language**: C
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-06-05
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

TTGO T-Watch    
=================================
<img src="img/1.jpg" height="400"/>
<img src="img/2.jpg" height="400"/>


T-Watch is an ESP32-based smart watch hardware designed by Shenzhen Xinyuan Electronics Co., Ltd. Hardware configuration with main core SOC (ESP32), 16MBytes large flash, 8MBytes external SPRAM, integrated multi-channel programmable power management chip ( AXP202), onboard three-axis accelerometer (BMA423), built-in step counter algorithm and other multi-function GSensor, with a variety of different configurations of internal replaceable backplane, such as LORA, GPS, SIM, SD

# Components and libraries
- PCF8563_Class -> RTC
- AXP20X_Class -> PMIC
- 
# PinOut
| Name        | Pins |
| ----------- | ---- |
| TFT CS      | 5    |
| TFT SCLK    | 18   |
| TFT MOSI    | 19   |
| TFT MISO    | -1   |
| TFT DC      | 27   |
| TFT RST     | -1   |
| TFT BL      | 12   |
| SD CS       | 13   |
| SD MOSI     | 15   |
| SD MISO     | 2    |
| SD SCLK     | 14   |
| TOUCH SDA   | 23   |
| TOUCH SCL   | 32   |
| SENSOR SDA  | 21   |
| SENSOR SCL  | 22   |
| UART TX     | 33   |
| UART RX     | 34   |
| USER BUTTON | 36   |
| RTC INT     | 37   |
| TOUCH INT   | 38   |
| AXP202 INT  | 35   |
| BMA423 INT  | 39   |

##  Button description:
**PEK KEY**: facing the screen, right upper right
- (on state) -> long press for four seconds to shut down
- (off state) -> long press for three seconds to boot

**USER KEY** : Close to the Type-C interface
- (on state) -> long press for two seconds to release, deep sleep

## Note:
- WIFI connection is only used as time synchronization

- `AXP202X_Library` will have set the DCDC3 output enable to normally open, because DCDC3 will supply power to the ESP32 main chip. If using other methods of control, please be careful not to turn off DCDC3, otherwise it will not be able to burn the program.
  
- In the Arduino board select `TTGO T-Watch`, the PSRAM is enabled by default, if it is not turned on, please open it.

## Known issue
- TODO


## Low power consumption:
- In standby mode (using the M6/M8 GPS module backplane), the display is off and the current minimum power consumption is approximately ~3 mA. Detailed step reference code closes the screen section
  


## Resource
- [BMA423 Datasheet](https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMA423-DS000.pdf)
- [PCF8563 Datasheet](https://www.nxp.com/docs/en/data-sheet/PCF8563.pdf)
- [ESP32 Datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf)
- [AXP202 Datasheet](http://www.x-powers.com/en.php/Info/support/article_id/30)
- [LCD Datasheet](http://www.newhavendisplay.com/appnotes/datasheets/LCDs/ST7789V.pdf)
- [FT5206 Datasheet](https://newhavendisplay.com/app_notes/FT5x06.pdf)


##  Using library files
- [TFT_eSPI](https://github.com/lewisxhe/TFT_eSPI)
- [TinyGPSPlus](https://github.com/mikalhart/TinyGPSPlus)
- [lvgl](https://github.com/lewisxhe/lvgl)
- [FT5206_Library](https://github.com/lewisxhe/FT5206_Library)
- [AXP202X_Library](https://github.com/lewisxhe/AXP202X_Library)
- [PCF8563_Library](https://github.com/lewisxhe/PCF8563_Library)
- [BMA423_Library](https://github.com/lewisxhe/BMA423_Library)
- [S7xG_Library](https://github.com/lewisxhe/S7xG_Library)
- [Button2](https://github.com/lewisxhe/Button2)


### The pictures and fonts used in the program are from the network. If there is any infringement, please inform the author.