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  • Arduino AND Bluetooth HC-05 Connecting easily

    It is a long time since I used the AT commands,There is a EN button on the hco5 that you must press during a power up (something like holding the EN pin low I dont remember exactly) this will put it in AT mode. Some boards dont have the EN button then you need to touch a wire to the EN pin during power upThis is the guide I followed https://www.instructables.com/id/AT-command-mode-of...You will have to find the data sheet and google for more details.Good luck

    When it works it is very simple no AT commands needed to set it up initialy(you can use them later once you are up and running) .Just connect TX (Arduino) goes to RX (HC05) and RX(Arduino )-TX(HC05)and HC power pins.Then write your code just like any normal serial : Serial.begin : set baud Serial.print("Hello World").Make sure the Serial you write matches the pin - Serial(TX RX pins ) Serial1 (TX1 RX1 pins).When you power up you should see the driver installing , you have to wait till it has finished then on your pc add a device and enter in the code to connect the bluetooth to your pc .(1234)The go to device manager to see bluetooth serial on COM5 or 6 or whatever.Open putty tel ,to that port and you should see your "hello World" I think you can use the Arduino...

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    When it works it is very simple no AT commands needed to set it up initialy(you can use them later once you are up and running) .Just connect TX (Arduino) goes to RX (HC05) and RX(Arduino )-TX(HC05)and HC power pins.Then write your code just like any normal serial : Serial.begin : set baud Serial.print("Hello World").Make sure the Serial you write matches the pin - Serial(TX RX pins ) Serial1 (TX1 RX1 pins).When you power up you should see the driver installing , you have to wait till it has finished then on your pc add a device and enter in the code to connect the bluetooth to your pc .(1234)The go to device manager to see bluetooth serial on COM5 or 6 or whatever.Open putty tel ,to that port and you should see your "hello World" I think you can use the Arduino serial monitor (as you have no usb connected)if it shows the Com port you see in the device manager. Good Luck

    Hi elhemm, Yes you have to disconnect the usb and power the Arduino using a different 5v supply(external battery ). (An old 5v phone charger could be used or something with a barrel connector ) Everything should work quickly once this is done.Regards

    Hi elhemm, Yes you have to disconnect the usb and power the Arduino using a different 5v supply(external battery ). (An old 5v phone charger could be used or something with a barrel connector ) Everything should work quickly once this is done.Regards

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