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Another variation on S3 I had been using several S3 chips for touch screen and AI projects. This one attracted my attention for the advantages of screen connector, battery management, SD card onboard and size. So I bought three. One to blow up, one to work on and a spare. Getting it to cooperate is… Continue reading Resolving issues with Lolin ESP32 S3 Pro

Here is a practical application example for the Touchscreen PCB. First, a couple of caveats: Arduino code for Touch Menu

At first I thought I had been sent a batch of faulty ILI9341 displays. They looked identical to the pile of others I’ve been using, but on first use were only writing to the top 2/3rds of the screen. These are 2.4inch displays that feature SDCard, touch interface and have given me great service. At… Continue reading A Tale of two Screens

Another interesting board which appears to suffer from poor documentation.No problem driving the graphics with TFT_eSPI and others, but the touchscreen proved elusive. In this example, I have had great results with the LovyanGFX library. This library supports the touchscreen, standard graphics calls for text and shapes, but the important (in my view) capability of… Continue reading WT32 Touchscreen

Quick reference. Refer to the page Differing ESP32 Display boards for more detail. A Pin Reference for both variants Function Notes TTGO-T-Display LILYGO S2 T8 Display TFT TFT_BL 4 33 TFT_CS 5 34 TFT_MOSI 19 35 TFT_SCLK 18 36 TFT_DC 16 37 TFT_RST 23 38 TFT_MISO -1 SD Card I2C_SDA 21 SD_CS 10 I2C_SCL 22… Continue reading Pin reference for ESP32 S2 and T-Displays

These devices are able to display a useful graph. Not accurate enough for measurements but good to see trends. In my case I use it to display various data trends from the household solar installation: PV output, Household usage, Feed-in, Battery state and so on. The attached code is very straightforward.The process involves: The DataAny… Continue reading Graphing with ESP32 S2 and T-Display (update)

The next challenge for these little powerhouses was to be able to use Bodmer’s brilliant TFT_eSPI library to see what the graphics capabilities might be. Just recently the libraries have been updated to include the S2 chipsets, and they appear to work very well. In fact the only reason for writing this post is to… Continue reading ESP32 S2 with ST7789 – jpg

By the time I have got this cleaned up I might have found a use for it !Still another challenge for these powerhouse ESP32 microcontrollers.On the back is a slot for SD card, and I’ll use this page to document the how and possibilities.An amusing aside: The SD card slot is tightly slipped into the… Continue reading ESP32 S2 with ST7789 – SD card