How to link esp32 to arduino uno?

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1

Esp32 has bluetooth and wifi connectivity both, so using an hc-05 for arduino uno,
how can we link them? (for eg I may want to press a button on esp's side and trigger some command on the uno's side using it.)

please help.

2

Can you get rid of the uno and do everything from the ESP…. It would be much simpler.

Otherwise there are on line articles such as (first Google hit - did not try/check)

3

actually i wanted to attach a joystick to increase the functionality of electric robo arm. the esp is at the control of the arm and the uno is of the control of the joystick. The hc-05 is there for communication between esp and uno.

4

I have searched but got no result which satisfied my need

5

Can’t you Just attach the joystick to the ESP?

Otherwise read the tutorial

6

Did you get BT working on the ESP32 by following the example code?

Did you get BT working on the Uno by following the example code?

After you get those working by following the example code, post your code and then ask us to give a hand in getting them to communicate. Otherwise you are asking that we solve your entire communications chain for you.

And really, you did not get any results searching with words "Uno hc05" and "esp32 bt" or "uno hc05 to esp32 bt communications"? Interesting.

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7

You have to perform the master-slave operation. The ESP32 BLE has to be configured as the Master and HC-05 has to be configured as slave. Unfortunately, I could not find any solid example. But I think if you see a couple of tutorials on master-slave operation between two ESP-32 and two HC-05 modules, I think you'll understand how to proceed.

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8

Thanks guys. As soon as i get a hint by trying the ways you all recommended ,I will reply.
fast and good help.
:blush::blush:

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9

There are some issues with the latest esp32 core for the Arduino and BluetoothSerial.h when trying to connect the ESP32 as Master to an HC05.
[Bluetoothserial with Password pairing only works on ESP32 v1.0.1 · Issue #6061 · espressif/arduino-esp32 · GitHub]

You can connect using core version 1.0.6 but any of the releases after that, have a change in the underlying ESP-IDF version used, and there is an issue with connection.

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10

Thanks a lot for sharing this information

11

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