LILYGO T

LILYGO T-QT Pro is an ESP32-S3 WiFi and BLE IoT board with a 0.85-inch color display, 4MB flash, 2MB PSRAM, a USB-C port, a few GPIOs, and support for LiPo battery with charging.

It is an upgrade to the ESP32-S3-based LILYGO T-QT V1.1 board that also supports LiPo battery power but lacks a charging circuit, so you had to remove the battery and charge it manually each time. The T-QT Pro adds a charging circuit and switches from an ESP32-S3 with an 8MB flash design to one using ESP32-S3FN4R2 with 4MB flash and 2MB PSRAM.

LilyGO T-QT Pro specifications:

The company says the board is programmable with the Arduino IDE, PlatformIO, or the ESP-IDF framework, and provides the same instructions, PDF schematics, and code samples for the LCD and deep sleep modes as the T-QT V1.1 board on Github. That also means we don’t have the schematics for the Pro board, so it’s unclear how the charging circuit has been implemented. The schematics were shared along with a block diagram with the FCC for certification, but neither are public, and all we have is a user manual, a test report, and a few extra photos.

I came across the LILYGO T-QT Pro board on Banggood where it is sold for $19.99 with two 7-pin headers, a “power cord” for the battery, and a 2-pin PH2.0 female cable. It is also sold on LILYGO Aliexpress store for $13.24 as the “T-QT ESP32-S3FN4R2”, and you can even get an enclosure for around 80 cents more. I can also see another T-QT Pro variant with ESP32-S3FN8 with 8MB flash, but no PSRAM that’s a little bit cheaper and also supports battery charging.

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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