Described as the LILYGO® TTGO T-Display ESP32 CP2104 WiFi Bluetooth Module, I received two of these this morning so as you can imagine, I have a learning exercise ahead of me – this then is just a quick look at these lovely modules complete with colour display.
So I’ve put together a very short video and as just about everything therein is new to me, be prepared…
While putting together my own preliminary material, I happened to stumble upon this guy (no association) who’s done some interesting stuff with these displays – his board has a battery – mine arrived complete with display, ESP32 and USB-C interface as well as a lead for a battery but no actual battery. He’s done a weather station and some other projects using these boards, hopefully I’ll do something interesting soon – I intend to stick Tasmota on one of them as that’s an environment I’m familiar with – assuming Tasmota will handle the display which, it seems, it will. In the ESP32 PLATINUM build 126.96.36.199 (DEV bin available) when setting up SPI, there are options for ST7789 CS and ST7789 DC
I did notice as I was wandering around the web, another fun project – a calculator on a TTGO. Not sure how practical it is – but it caught my eye, as someone raised on Casio calculators.
Here goes with the short video, warts and all… and yes, I will get to grips with the colour balance – my hands aren’t really that colour 🙂
Note that as well as the TTGO display, Banggood also have a standalone 1.3″ 240*240 colour ST7789 display and I’m expecting that to work with Tasmota too (most likely with an ESP32 but I have been pushing at Tasmota to continue support for displays on the ESP8266 with encouraging results).
At the time I wrote this quick intro I was a bit short of available power on my desktop but now thanks to my new Bakeey power supply / charger and a timely comment from reader Don, I’ve re-examined the buttons – the side one is clearly reset, the bottom two can be general purpose. The demo includes a WiFi scan and report as well as system voltage readout – and quite possibly a lot more but of course, that’s just the demo. See photos below.. Of course, being based around an ESP32, the boad has full Bluetooth capability as well as WiFi.