Adding Battery percentage and Temperature in Scan response packet in a ble_app_beaocn

[TJ]

Hi,

I'm trying to add the device information such as Battery percentage , temperature in the scan response packet to the ble_app_beacon example. I could add the data and adversities the data in the scan response, but the issue is the battery level or the temperature are being updated on device reset. Is there a way to fix the issue?

I'm using nRF5_SDK_15.2.0_9412b96 and nRF52840-DK

Right now i am trying to read the battery and temp value and added to scan response data

I have few questions:

1. Do we need to add it as a services like Battery service and temperature service

Thanks

[Simonr]

Hi

the battery level or the temperature are being updated on device reset.

 What do you mean by this? It should be possible to add these values in the scan response data, but I don't know how well it would work in practice, as most mobile devices won't show the scan response if you don't have a specific app for that purpose. I assume you are adding this data in the .scan_rsp_data function?

I think it would be easier, if it's possible in your use case, to add the battery level and temperature data in the advertisement packet itself if it doesn't take too much space.

To add the battery and temperature services the device has to connect to a central, which the beacon doesn't do.

Best regards,

Simon

[TJ]

Thanks for the reply Simonr

I'm using nRF connect app for iOS and i could see the data as service data 

when i scan the beacon in the nRF connect app i'm getting the static data even though there is a change in temperature it doesn't reflect unitl we reset the DK

I mean i would like to update the scan response packet dynamically after a particular period of time ( for example let us say for every 1 hour)

To get the updated data dynamically do we need to stop the advertising and start again or 
I have seen in few threads in older SDK's they call an API to set the data 
Is there any such API available to update the data during the advertising  

Thanks 
Teja

[Simonr]

Hi 

It should be enough to stop advertising and reinitializing it whenever you want to update the values, as the beacon will advertise the data that was used during the adv. init.

Best regards,

Simon

[cbd]

+1 for mentioning that advertising needs to be stopped, re-initialised and restarted to update data in the advertising and response packets.

[Jimmy Wong]

Hi,

You can use the declare the global variable with array and put this data pointer on the scan response.

just like the file at https://github.com/jimmywong2003/nrf5-modify-device-parameter-through-host/blob/modify_non_connectable_advertising/ble_app_change_advertising_example/main.c