LILYGO® TTGO T-Watch ESP32 WIFI bluetooth S78G GPS LORA Capacitive Touch Screen Programmable Watch Open Source Smart Watch

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S78G Black
S78G White
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About this item
Hardware Specifications:

Chipset ESP32, dual-core MCU, PMU power management
FLASH QSPI flash 16MB 
Button power key , IO36
Extended function  
USB to TTL CP2104
Modular interface UART, SPI, SDIO, I2C, LED PWM , PWM, I2S, IRGPIO, capacitor touch sensor, ADC, DACLNA 
On-board clock 40MHz crystal oscillator 
Working voltage 2.7V-3.6V
Working current about 70mA
Sleep current about 3mA
Working temperature   -40℃ ~ +85℃
Size & Weight 46.47 x 43 x 20.4mm
Display 1.54 inch LCD capacitive touch screen
Sensor BMA423 three accelerometer, built-in step counting algorithm, activity recognition / tracking, advanced gesture recognition.
RTC clock PCF8563
Power Supply Specifications:

Power Supply USB 5V/1A
Charging current 500mA
Battery 3.7V lithium battery

Protocol 802.11 b/g/n(802.11n, speed up to150Mbps) A-MPDU and A-MSDU polymerization, support 0.4μS Protection interval
Frequency 2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power 22dBm
Communication distance 300m
Protocol meet bluetooth V4.2 BR/EDR and BLE standard
Radio frequency with -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
Audio frequency CVSD&SBC audio frequency
Software Specifications:

Wi-Fi Mode Station/SoftAP/SoftAP+Station/P2P
Security mechanism WPA/WPA2/WPA2-Enterprise/WPS
Encryption Type  AES/RSA/ECC/SHA
Firmware upgrade UART download/OTA (Through network/host to download and write firmware)
Software Development Support cloud server development /SDK for user firmware development
Networking protocol IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT
User Configuration AT + Instruction set, cloud server, android/iOSapp

Appearance Specifications:
T-Watch onboard:

1.54 inch LCD capacitive touch screen: ST7789V
Touch screen chip: FT5206
Accelerometer: BMA423
PMU power management: AXP202
RTC clock module: PCF8563
Expand the interface:
Support microphone: MSM261S4030H0
Support SPI TF memory card
2 digital I/Os: GPIO25, GPIO26 (supports ADC, DAC)
Support I2C, UART, SPI communication protocol

Product Details:
• Chip: BMA423
• Latest generation triaxial, low-g acceleration sensor
• ultra-small
• digital interfaces
• 2-bit digital resolution and embedded intelligence
• allows low-noise measurement of accelerations in 3 perpendiculars and thus senses wrist tilt, tab/double tab and enables plug & play step counting especially in wearable devices.
Recommended for:
- Step-counting in wearable devices
- Wake up display on wrist tilt
- Low power user interaction by tab/double tab
- Advanced gesture recognition
- Activity recognition/tracking
- Advanced power management
- Tilt compensation for electronic compass

Package includes:
(the battery is not includes)

GPS and LORA (s78G) Black Optional:
1 x GPS and LORA (s78G) Black version

GPS and LORA (s78G) Black Optional:
1 x GPS and LORA (s78G) White version

T-Watch S78G GPS LORA Optional:
1 X Expansion board

Additional Information

S78G GPS LORA, S78G Black, S78G White

Shipping information

(1) FREE Shipping 10 - 15 business days, (2) Standard Shipping 7 - 12 business days.

Shipping and Delivery Estimates

We ship in-stock orders as soon as possible. This is often within two business days, but there are situations where it may take longer. All estimates are based on business days.


(1) The shipping time mentioned above refers to the estimated time of business days that the shipment will take after an order has been shipped.

(2) Business days do not include Saturday/Sunday and any public holidays.

(3) These estimates are based on normal circumstances and are not a guarantee of delivery times.

(4) We are not responsible for the failures or delays in delivery resulting from any force majeure event, such as natural disaster, bad weather, war, customs issues, and any other event beyond our direct control.

Return and exchanges

Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can't offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

for more information please visit our Refunds & Returns Policy page.