Open source implementation of OPC UA (OPC Unified Architecture) aka IEC 62541 licensed under Mozilla Public License v2.0
Arduino library for DHT11, DHT22, etc Temperature & Humidity Sensors
Arduino, esp32, Esp8266 EMailSender with Arduino IDE, simple library to send email via smtp with attachments.
WIRELESS CMSIS-DAP USB/IP-SWD/JTAG HID adapter firmware for ESP8266 boards
FatFs is a generic FAT file system module for small embedded systems. The FatFs is written in compliance with ANSI C and completely separated from the disk I/O layer. Therefore it is independent of hardware architecture.