How to get the value from a WRITE_EVT into a variable.

Question

I am trying to modify the ble_app_hrs so that i can write a value to the board and save it as a new heart rate value. So far i have added a BLE_GATTS_EVT_WRITE case to the event manager, as well as adding the specific handle i want the write value from. 
 How can i write the value given in the write event into the heart rate variable?

Pål Håland · Accepted Answer

Hi Mathias, 
 if I understand you correct, you just need to copy the value of the event/data. 
 
if (p_ble_evt->evt.gatts_evt.params.write.handle == my_handle)
{
 memcpy(&destination, p_ble_evt->evt.gatts_evt.params.write.data, p_ble_evt->evt.gatts_evt.params.write.len);
}

 
 if you would like to write to the server database, and store the value of the write there, then the best way to do that is to: 
 
uint16_t len = p_ble_evt->evt.gatts_evt.params.write.len;
sd_ble_gatts_value_set(handle, 
 p_ble_evt->evt.gatts_evt.params.write.offset,
 &len,
 p_ble_evt->evt.gatts_evt.params.write.data);

 
 Hope this helps,
BR
Pål