If you have a spare lanyard and you don’t live in a Mediterranean climate, you probably want to know what the temperature is right now. To that end, you might want to have a look at this project that will help you create a wearable temperature card. Here’s more from Arnov Sharma via hackster.io:
Here’s something cool: The TEMPERATURE CARD The project is a wearable ID card-like device that has an OLED screen that displays live temperature readings taken from the SHT40 temperature sensor module.
The heart of this project was an XIAO ESP32C3 development board, which is paired with an SSD1306 display. An SHT40 TEMP sensor is being used for temperature data, and the whole setup is powered by a small 3.7V LiPo cell that is connected directly to the XIAO ESP32C3 board’s battery terminals.