TTGO T-Display with DHT22 Temperature Sensor

Read and display Temperature and Humidity in my van.

Table of Contents

• General Info
• Technologies Used
• Features
• Screenshots
• Setup
• Usage
• Project Status
• Acknowledgements

General Information

• This is my FIRST esp32 project.
• I could not find a digital thermaometer that met my needs.
• Wanted the Temp, the RH and the 24 hour Highs and Lows.
• TTGO T-Display: Amazon
• DHT22: Amazon

Technologies Used

• Adruino 1.8.19
• TFT_eSPI
• Adafruit Unified Sensor (Dependancy for DHT library)
• DHT sensor library

Features

• Gets the Temperature and Humidity and displays it on the screen.
• Screen brightness adjusts to the ambient light.

Screenshots

• Libraries Used
• 
• 
• 
• Wiring Diagram
• 
• Screen Layout
• 

Setup

• Manufacturer info: Xinyuan-LilyGO
• You will need the Adruino IDE. (I am on windows)
• Add esp32 support by adding https://dl.espressif.com/dl/package_esp32_index.json in the preferences
• Select the board: Tools -> Board: -> TTGO LoRa32-OLED V1
• Set the Serial at 921600
• TFT_eSPI
  • In Arduino/libraries/TFT_eSPI/User_Setup_Select.h
  • Comment out this line: #include <User_Setup.h> // Default setup is root library folder
  • Un-comment this line: #include <User_Setups/Setup25_TTGO_T_Display.h> // Setup file for ESP32 and TTGO T-Display ST7789V SPI bus TFT

Usage

• Once the IDE is set up, and the components wired.
• Plug in your T-Display.
• Verify your Port.
• Click the Upload arrow.
• And I think that's it.

Project Status

Project is: Completed.

Acknowledgements

• Big thanks to Retro Tech & Electronics for the TTGO and DHT22 information.
• Got the Battery info from oxinon.
• Got the README template from ritaly.