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

[Mathias]

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]

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

[Juliane]

Hi Mathias,

If I write 123456 to device from Master Control Panel and want to get it ,then store it and display on the LCD .How can i achieve it?

Thanks!