What variable and struct does the write characteristic store its data in after a write command from an application on nrf connect?

[RyanA]

Hello,

I have followed the BLE tutorial on characteristics to make my own 2 custom characteristics that successfully read and write uint8 data to my nRF52832, however I want to take that data that was written from each characteristic to my chip and store them in local variables in my main loop, how do I do this? 

[awneil]

When the Central (any Central - not specific to nRF Connect) writes a Characteristic, you will get a BLE Event - and the data is in that event.

[RyanA]

Ok, is there a specific function or struct that I can see that in?

[awneil]

Have you looked at the Service & Characteristic tutorials?

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial

they include the event handler ...

[RyanA]

I read the characteristics tutorial and I can see they have a handler for the BLE event in this function: 

In that handler we get this definition:

Where in here are we updating our actual write value data? I want to take that written value and print it in the debug window to verify my app write function is working. 

[awneil]

That's the one!

If you go to the definitions of those events, you will find that there are also other events - including one for 'Write'.

In the event structure, you get (a pointer to) the data that was written ...

Not as pictures!