TTGO T-Watch

Development Board

Code name: TWatch

ESP32 LILYGO

TTGO T-Watch is a development board based on the ESP32 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 16MB flash memory.

About TTGO T-Watch

Smartwatch-style ESP32 board with display, battery, and sensors - great for wearable IoT and portable dashboards.

Technical Specifications

Complete technical specification details for TTGO T-Watch

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 4.2

BLE 4.2

Microcontroller

Model esp32

Clock Speed 240 MHz

Flash Size 16MB

Architecture xtensa

✨ Features & Pins

Digital IO 20

Analog Input 16

PWM 13

Interrupts 16

Quick Setup

Copy-paste configs for TTGO T-Watch - auto‑generated from this board's exact hardware specs.

ESP32 240 MHz 16MB DIO Xtensa

In Arduino IDE 2 select Twatch from the esp32 by Espressif package. In PlatformIO use board = esp32dev. ESP32 · 240 MHz · 16MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Twatch

CPU Frequency 240 MHz

Flash Size 16MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Twatch" for the TTGO T-Watch.

platformio.ini


[env:twatch]
platform  = espressif32
board     = esp32dev
framework = arduino

; Exact hardware config for TTGO T-Watch
board_build.mcu        = esp32
board_build.f_cpu      = 240000000L
board_build.flash_size = 16MB
board_build.flash_mode = dio
board_upload.flash_size = 16MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32dev
  framework:
    type: arduino   # or "esp-idf"

# TTGO T-Watch - 240 MHz ESP32
# Flash: 16MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 16MB \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

Useful Links

Datasheets and resources for TTGO T-Watch

ESP32 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for TTGO T-Watch

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	PWM	Other
1	PWM	TX
2	PWM	MISO
3	PWM	RX
13	PWM	SS
14	PWM	SCK
15	PWM	MOSI
21	PWM	SDA
22	PWM	SCL
23	PWM	TP_SDA
25	PWM	DAC1
26	PWM	DAC2
32	PWM	TP_SCL
33	PWM	TX1
34		RX1
35		APX20X_INT
37		RTC_INT
38		TP_INT
39		BMA42X_INT1

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for TTGO T-Watch

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	dio
Maximum upload size	6400 KB (6553600 bytes)
Maximum data size	4416 KB (4521984 bytes)