kv4p HT is an open-source hardware VHF or UHF radio designed to plug into the USB-C port of an Android smartphone and turn it into a handheld ham radio transceiver. It’s based on an ESP32 wireless ...

I've been developing some apps with MQTT communications and have encountered a problem on Android with the Paho library. I had a couple of apps that were functioning fine until the latest update to ...

Abstract: In today's world, energy efficiency and smart technologies are becoming increasingly important. Lighting is a significant contributor to energy consumption, and traditional lighting systems ...

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ABSTRACT: Geospatial technologies can be leveraged to optimize the available resources for better productivity and sustainability. The resources can be human, software and hardware equipment and their ...

java.lang.RuntimeException: Error receiving broadcast Intent { act=.callbackToActivity.v0 flg=0x10 pkg=com.ceshi.demo(has extras) } in info.mqtt.android.service ...

This project incorporates communication between an Android Phone and the Arduino using Bluetooth. The basic functionality includes taking messages from an android phone, displaying them on an LCD ...

Abstract: Microscope is an optical device that uses lenses to produce magnified objects too small to be seen clearly by the naked eye. This bulky and expensive device is used mainly in medical and ...

android程序在我手机上总是崩溃，程序运行日志显示错误在以下紫色部分处，存在java.lang.nullPointerException异常，导致每次准备打开电灯时程序都会崩溃。 问了很多人都不知道该怎么解决，我刚刚接触android和arduino实在是没有办法了。希望各位大神能够帮帮我，谢谢 ...