Only getting 1 paket per CI

RE: Only getting 1 paket per CI

Rasmus — Mon, 17 Feb 2020 07:26:16 GMT

Hi,

I figured it out, I had to give my char the write without response permission.

thanks a bunch

RE: Only getting 1 paket per CI

Rasmus — Fri, 14 Feb 2020 09:09:01 GMT

Hi Edvin,

Thank you so much.
Ok, so the way to go in my case would be something like on the phone-side:
Set "notification = true"
"writeWithoutResponse = true"?

When I try this and I am writing data from phone to 52832 without response set to true, the packets never reaches my ble_cus_on_ble_event(), thus not my on_wite-function in my custom service. Do I have to enable writeWitoutResponse in my custom service/characteristic somehow?
Please let me know if you need any additional information/code examples etc..

Thanks you and best regards /Rasmus

RE: Only getting 1 paket per CI

Edvin — Tue, 11 Feb 2020 13:58:42 GMT

Hello Rasmus,

If you are using notifications, then the bluetooth stack will check the CRC of the BLE packet, and ACK it for you. This means that all the packets you send using notifications will be ACKed by the stack. If you wait for a custom ACK in the application, then there will only be one packet in the air each connection interval.

[quote user=""]If I would write without and response, is there any kind of checksum test going on or how would I know all the bits are correct?[/quote]

Yes. This is the ACK that is in the bottom of the Bluetooth Low Energy specification, which is embedded in our softdevice, and which is also included in the bluetooth stack on your phone.

Best regards,

Edvin