The Chinese company Lilygo produces a variety of IoT devices. Its T-Display series - also known as TTGO - specializes on ESP32-based development boards with integrated displays that all come with integrated LiIon battery connector and charger. T-Display boards are a one-stop solution for many microcontroller-based IoT projects.
The boards base on ESP microcontrollers, i.e. ESP32S, ESP32-S3, and ESP32-C3/6. T-Pico adds an additional Raspberry RP2040 to the ESP microcontroller (so you can use both).
Overview
Since Lilygo has been around for years and has a reputation to defend, the board designs and build quality are excellent. Often more importantly, there is detailed documentation on github as well as helpful after-sales customer support.
T-Display boards are only slightly more expensive than generic boards (especially when you take into account the added hardware like display and battery charger, and even more so when you take advantage of special sales that regularly occur on marketplaces like AliExpress).
Integrated Display
The primary feature of T-Display development boards is their integrated display that comes in almost all shapes and technologies.
All boards also come with a connector for a LiIon battery: the board can be powered via USB (stationary or off a power bank), or via a dedicated LiIon battery. This battery gets automatically recharged once the board is connected to USB power.
Here is a picture of a basic T-Display board: the LiIon battery can be connected via a JST 1.25mm plug on the backside of the board, and an appropriate cable with plug is included:
Models also typically feature programmable buttons, and shells can be ordered separately.
Models
T-Display models vary in features. Use the table below for quick reference: it lists the most commonly used general purpose models, their microcontroller(s), and display type and size. For more details, click the model name.
| Name | ESP32 Type | Display Type | Size (Inch) | Resolution | Touch | Driver |
|---|---|---|---|---|---|---|
| T-Display | ESP32S | Color TFT | 1.14 | 135x240 | no | ST7789 |
| T-Pico | C3+RP2040 | Color TFT | 1.14 | 135x240 | no | ST7789 |
| T-Pico Pro | C6+RP2040 | Color TFT | 2.33 | 222x480 | yes | ST7796 |
| T-Display-S3 | S3 | Color TFT | 1.9 | 170x320 | optional | ST7789 |
| T-HMI | S3 | Color TFT | 2.8 | 240x320 | yes | ST7789 |
| T-Display S3 AMOLED | S3 | OLED | 1.91 | 240x536 | optional | RM67162 |
There are many more models available, with additional features such as LoRa radio transmitters, or special form factors.
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(content created Sep 29, 2024 - last updated Oct 05, 2024)