Problem | BLE APP UART and Buttonless DFU with Bonding

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

SK — Mon, 22 Jul 2019 09:46:08 GMT

Perfect! That worked. Thanks a lot, did not know that. 🙂

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

Vidar Berg — Mon, 22 Jul 2019 09:33:32 GMT

Notifications are not enabled automatically, you need to click the "Play" (Arrows if you use app on Android/iOS) button next to the tx characteristic to enable it. Did you do that?

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

SK — Mon, 22 Jul 2019 09:30:42 GMT

I checked for the same event (BLE_NUS_EVT_COMM_STARTED) but with nRF connect app, this event is not coming in the nus_data_handler(). :(

Any idea why would that be?

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

Vidar Berg — Mon, 22 Jul 2019 09:24:43 GMT

Yes, you should receive BLE_NUS_EVT_COMM_STARTED in your nus_data_handler() callback as soon as notifications have been enabled by the client.

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

SK — Mon, 22 Jul 2019 01:09:17 GMT

Hi Vidar Berg

Thank you for your reply. I will check and update here. Is there any way to know if Central has enabled notifications for the particular characteristic? Like an event on the peer side of the confirmation?

RE: Problem | BLE APP UART and Buttonless DFU with Bonding

Vidar Berg — Fri, 19 Jul 2019 11:56:11 GMT

Hi,

Thanks for the update.

[quote user=""]1. BLE NUS send sends error 8 -> INVALID STATE error on connection to nRF connect app. I am still not sure why, will keep looking. Please let me know on my leads.[/quote]

The send function will return invalid state if you are trying to send data before the client (nRF connect app) has had time to enable notifications on for the characteristic. Could this be the problem?