| ACNode | Access Control node for the Makerspace in Leiden,NL |
| MFRC522-spi-i2c-uart-async | Arduino RFID Library for MFRC522 (SPI, I2C and UART) with asynchroneous callbacks |
| TLog | Arduino TLog library; to also send (Serial) logs via telnet, mqtt, syslog, a web browser, etc. |