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.
M5Stack’s light sensor detects the lighting of the rotary beacon light and sends the lighting information to the Raspberry Pi via BLE (Bluetooth Low Enegy).
I used the M5StickC and BME280 sensor module to measure temperature, humidity, and air pressure, and advertise the measurement results via BLE.
I got an M5StickC.
M5StickC is a stick-type product from M5Stack Company, which is based on ESP32-PICO, the same architecture as ESP32.