Compared to the Arduino Uno of old, modern microcontrollers are absolutely tiny — especially for the amount of processing power and I/O you get. But if you need something really small, like ...

This library is not maintained. It was my first 'popular' Open Source project, and brought MQTT to the Arduino platform just as both were gaining popularity. But times have changed, and I haven't ...

This is the VirtualWire library for Arduino It provides a simple message passing protocol for a range of inexpensive transmitter and receiver modules. See http://www ...

Abstract: This paper reports a regulation-free sub-0.5-V crystal oscillator (XO). The XO specifically designed for Bluetooth low-energy (BLE) radios aims for direct-powering by the harvested energy.