Switching LED state using button in Blinky example

[antoniov]

Hello,

I am playing around with the Blinky example on my custom board, where I have one button and two leds. Everything works fine and I can control the LED2 and detect the button action using the smartphone. 

What I would like to do now, is to change the led state not only via ble, but also using a single press of the button and have that notified to the smartphone.

For instance:

 - send 0x01 via smartphone -> LED ON        

 - press button -> LED OFF (notify the change in state 0x00)

 - press again the button -> LED ON (led state 0x01)

Any suggestion on how to do that??

Thanks in advance

Antonio

[Simon]

You need to do 4 things:

1. Enable notifications on the LED characteristic 
   • This is done for the button characteristic, take a look at the function ble_lbs_init() in ble_bls.c to see how it is done
2. Add a notify function for the LED characteristics
   • Take a look at the function ble_lbs_on_button_change() in ble_lbs_init() to see how this is done. This function notifies the Button characteristic
3. Add your button to the array button[] in buttons_init() in main.c
   • E.g. YOUR_BUTTON (Set the define equal to whatever pin the button is connected to on your custom board)
4. Add a new event for a button click
   • Inside button_event_handler() in main.c, add a new case with e.g. YOUR_BUTTON which will call the function made in step 2

I have not tested this myself and may have forgotten something, but I believe this should work.

Best regards,

Simon

[antoniov]

Thank you Simon!!

I followed your points. It works perfectly

[Simon]

No problem, I'm always happy to help. Would you like to verify the answer?

Best regards,

Simon

[antoniov]

Done ;)