"WeMos" ESP32 Notes
November 01, 2017
If you haven’t caught on to the ESP32 yet, you really should.
It’s a wonder of engineering. At ~$10 USD, you get 2.4ghz wifi b/g/n, Bluetooth LE, 9 capacitive touch pins, tons of IO, and a mega fast processor with more than enough room for your project in a wonderful little Arduino Compatible package.
Thats it for ESP32 overview. These are my notes on 1 very specific ESP32 package.
The “WeMos” ESP32
According to this forum post, the “WeMos” labeled ESP32 is a knockoff re-branded
Simply for my sanity, I’ll be referring to it as the WeMos ESP32, as its featured in the blatantly stolen branding.
This board features a OLED display right on the board,
BOOT buttons surface mounted.
My particular one also has a female JST header next to the micro USB port, which I assume is for a LiPo battery, although it is unclear if it is really for that.
The OLED display is driven over I2C, with SDA linked to pin
5, and SCL linked to pin
The I2C Address of the display is at
The wiring of I2C, being as it is hard wired into the board, and reversed from normal, makes addressing other I2C devices a bit more of a challenge. Currently im trying to setup a BME280 with it.
I will update this post over time with more notes on this cool little device as a find them.