Default value for maximum measurement distance is 4m, since HC-SR04 sensor can't measure reliably beyond that. However, if you are using another sensor or if you you don't care about distances larger ...
Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...
This library provides a client for doing simple publish/subscribe messaging with a server that supports MQTT. The library cannot currently be used with hardware based on the ENC28J60 chip – such as ...