Tutorial on Bluetooth sensor HC-05 with Arduino | Connections & Coding

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This video tells you how you can control LED or any other stuff with the help of an Arduino board, a bluetooth module/sensor & an Android/smartphone !

Code available here :-

BlueControl app link :-

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26 Comments

  1. Bro please help , Serial just shows me some sort of ? ? or random characters. Checked the connections and code two times. Its not working. Please help .

  2. hai to mech stuff, this is ravi , i like your project so i also want to make it. i got all the components from amazon like (Arduino uno, HC-05 bluetooth module ,led) ,and the same app you r using . there is no problem about com port & uploading code to arduino uno.and all the circuit ,bluetooth also working ,but the problem is after connecting the bluetooth with android phone , the comands to led are not responding,and the led not turning "on & off". so please give me a solution.

  3. Nice one. But i wanted to know this– instructions that are being sent from mobile via bluetooth is detected by hc05 and then the tx pin of hc05 is transmitting the signal to the rx pin of arduino right? What is the rx pin of hc05 and tx pin of arduino needed for? What information is arduino transmitting to hc05?

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