Article on the measurement of illuminance with the ESP32-WROOM-32 module using ROHM’s GY-302, a modularized illuminance sensor (BH1750FVI).
Article on the measurement of eCO2 (equivalent CO2) and TVOC (Total Volatile Organic Compounds) with ESP32 and CCS811 and display on OLED display.
The measurement results of the CO2 sensor (MH-Z19C) were displayed on the display using ESP32. connection to the ESP32 module is I2C.
The BME680 can detect temperature, humidity, barometric pressure, and gases, and is connected to the M5Stick-C for display on the monitor.
The Arduino IDE uses Log4j internally, and is affected by the Log4Shell vulnerability. I took the opportunity to install v2.0 which does not use Java.
This is an article about running a sample program with an ESP32 (ESP32-WROOM-32) connected to an I2C 1602 16×2 character LCD module display.
There was a time when I wanted to save a file on ESP32-WROOM-32 and load it from a sketch program. I found out that SPIFFS can be used.