Portable IoT Display

This instructables show how to use a 2 inches LCD and ESP32 to make a portable IoT Display.

Supplies

TTGO T7 V1.0

https://www.aliexpress.com/item/32998388114.html

2 inches IPS LCD

https://www.aliexpress.com/item/32949052390.html

402035 Lipo

https://www.aliexpress.com/wholesale?SearchText=40...

D-Ring Locking Carabiner Clip Keychain

https://www.aliexpress.com/item/33041850599.html

Step 1: 3D Print Case

Please download and print the case at thingiverse:

https://www.thingiverse.com/thing:4564272

Step 2: Soldering Work

Follow the LCD datasheet connect the pins. Please read through the datasheet before connection especially if you are not ordered same LCD model.

Here are the connection summary:

ESP32   -> LCD
GND     -> Pin  1 GND
        -> Pin  2 LED K
3v3.    -> Pin  4 Vcc -> 20 Ohm -> Pin 3 LEDA
GPIO 27 -> Pin  7 D/C
GPIO  5 -> Pin  8 CS
GPIO 18 -> Pin  9 SCK
GPIO 23 -> Pin 10 MOSI
GPIO 33 -> Pin 11 RST

Step 3: Seal Wires

Use some tapes to seal the soldered wires and exposed pins.

Step 4: Assembly

Please follow the video to assembly.

Step 5: Program

Arduino IDE

Download and install Arduino IDE if you are not yet do it:

https://www.arduino.cc/en/main/software

ESP32 Support

Follow the Installation Instructions to add ESP32 support if you re not yet do it:

https://github.com/espressif/arduino-esp32

Arduino_GFX Library

Download latest Arduino_GFX libraries: (press "Clone or Download" -> "Download ZIP")

https://github.com/moononournation/Arduino_GFX

Import libraries in Arduino IDE. (Arduino IDE "Sketch" Menu -> "Include Library" -> "Add .ZIP Library" -> select downloaded ZIP file)

Compile & Upload

1. Connect the device with USB cable
2. Open Arduino IDE
3. Open ESPWiFiAnalyzer sample code ("File" -> "Example" -> "Arduino_GFX" -> "ESPWiFiAnalyzer")
4. Press Arduino IDE "Upload" button

Step 6: Enjoy!

This 2 inches IoT display not only a simple ESP WiFi Analyzer, ESP32 have much more possibilities. It's time to use your imagination to develop your unique IoT device!

Comments

[Lacybad]

Hello!
Could i use this sketch with Ili9341 SPI LCD?
I have a lot of them and a number of bare bones ESP32 modules :)

[陳亮]

Sure! Simply replace Arduino_ST7789 to Arduino_ILI9341

[YLBright]

Thanks for the project and links.

However, the ESP32 is unavailable.

[陳亮]

May be I recreate a bigger 2.4 inches version for T8 and a smaller version for T-Display.

[陳亮]

updated the link, please refresh this page and try again. Hope this time it can last longer.

[MichaelB256]

They are removing the 1.0 version from everywhere. Your new link is already unavailable. I ordered a few times only to have them cancelled by the seller because they are gone. Only the 1.3 and 1.4 version are sending, but those versions don't seem to have any good support in Arduino IDE. I am finding the esp32's having poor support in Arduino, and most are using ESP-IDF which is horrible IMO.

[karman85]

I had the same proble so I ended buying a TTGO T7 V1.4 and self design a custom enclosure.

[TechPaul]

Just look for the TTGO T7 ESP32 from the home screen on AliExpress

[YLBright]

Thanks. Looking foward to more ESP32 projest.

[陳亮]

T7 have 2 versions in the market, v1.0 and v1.3, the layouts are different. This project is using v1.0.

[Build_it_Bob]

Very nice project. I like the unique housing that you made.
Thank you for sharing,
Bob D