OOCSI (1.5.18) for esp32/esp8266/samd/megaavr/mbed_nano/mbed_rp2040/rp2040/esp32s3 by Jort Band, Mathias Funk, Eden Chiang
https://github.com/iddi/oocsi-esp
OOCSI client library for the development boards of ESP32 series, ESP8266 series, Arduino MKR Wifi 101, Arduino UNO Wifi, Arduino Nano 33 IoT, Arduino Nano RP2040, and Arduno Uno R4 WiFi