TTGO ESP32, OLED, & Battery

I bought one of these. It has a label TTGO and has a holder for a 18650 battery on the back and OLED.

However I’m not sure which display chip it uses. Just curious in case someone knows right off? I’m thinking ssd1306 as a possibility. If nothing else I’ll load those drivers and see if it works. What others might it be?

Also not sure what board to select. I may have to dig around since I’m new to the WROOM-32 modules.

Michael

RIght now I’m looking through Roger’s videos and working through that first to get a basic sketch going.

Michael

Isn’t that an esp32 not a stm32?

My bad. Yes. It’s ESP32.

I was able to get it all connected and running a blink sketch on it. Now to try the display drivers.

Michael

This will take some time. Not sure how the display is connected. Poke and hope I guess.

Michael

Well I found a site that had this board. I had to use Google translation. But at least found a pinout diagram that showed what I needed. If this board works out it will be pretty nice since it has a battery holder on the back side. Also a switch to turn off the display if you don’t need it.

a link if you please
it could also be spi or i2c as well
ssd1306? isn’t there a sh11xx or similar.
browse the adafruit github repository, it got a few display types listed
stephen

quick aliexpress – they all seem to use the same photos & blurb, overview link is for esp32 itself.

https://de.aliexpress.com/store/product … 2878neRVWq

It was I2C and using the SSD1306 drivers worked. There is a 1106. When I installed the SSD1306 driver library it contains both.

It showed on pinout diagram which pin was SDA and SCL.

Michael

Unfortunately, your link does not work anymore. Which pins were used for SDA and SCL?

Andreas

I think this is a similar product: https://www.aliexpress.com/item/TTGO-Wi … 79503.html

Yeah, that is it. Luckily too I saved the web paged and all the images in case they did remove it. I used the ssd1306 display driver with the following line:
SSD1306 display(0x3c, 5, 4);

Michael