This explains how to control devices using wireless transceiver module NRF24L01. The same can be modified as wireless sensor project.

Bluetooth and Android-based call indicator with panic switch for calling a preset number.

Make a long range remote controller for your robot.

Just how powerful is that plane?

Controlling your aquarium lighting with cron, Android, web-browsers and others.

This is a beginner project in which we'll be lighting fireworks using a Bluetooth enabled phone.

IoT sensing, notifications, and analytics platform for urban and large-scale agriculture with automated irrigation, using Sigfox technology.

A simple audio controlled TV remote using Arduino, Bluetooth, IR transmitter and Android device.

A low cost network of weather and soil sensors streaming real time data to Microsoft Azure for analysis.

This explains how to control devices using BLE and smartphones.