We were most familiar with the CTS, or Clear to Send pin, on the serial side of things. When this pin is active, it indicates to the host that the attached device is ready to receive further data.

Learn how to initialize and manage EEPROM settings on Arduino to store data like user preferences, calibration values, or ...

They used the webaudio API to send serial data to a remote Arduino. The hack uses a FET, a capacitor, and a few resistors. They didn’t quite build a real modem with the audio.

You can send and receive serial data over WiFi by connecting WiLoader dedicated serial pins to AVR UART pins (RX, TX). Just like other COM ports that Arduino serial monitor uses for communicating ...