nRF52832 UART example fails to connect to iphone/IOS device?

[ldmxhj]

We have successfully tested the nRF52832 HRM and proximity examples with iphone APP (nRF Toolbox & LightBlue). However, when we tested with UART peripheral example (..SDK\examples\ble_peripheral\ble_app_uart), we are not able to make the connection (timeout) from the Iphone.

We have tested with follows: Board: PCA10040 Devices: iphone 6 and 6S, IOS Apps: nRF Toolbox UART, nRF UART, LightBlue SDKs: SDK14, SDK13, SDK11, SDK10, SDK9, Softdevices: S132 5.0, 4.0, 2.0

But it works well with android phone (nRF Toolbox UART). Any suggestion and help?

[Roger Clark]

Which version of iOS are you using.

LightBlue and nRFConnect both work fine for me on iOS10.3.3 on an iPad connecting to the UART example built using SDK 12.3.0

[ldmxhj]

The iphone 6 is currently with 10.3.3, and the iphone 6s is with 10.3.2. We haven't tried the SDK 12 yet, so you think only sdk 12 works with ios?

[Roger Clark]

No.

I have used SDK 10 and SDK 11 with iOS, but I can't recall if I used the UART example.

Actually...

What precisely is the problem... What do you mean by

"we are not able to make the connection (timeout) from the Iphone."

I was looking at this in SDK 12.3 yesterday and there is no timeout on the connection, at least from the BLE device standpoint.

However I added a timeout to my version of the UART example (which I'm using as a template for a 128 bit service), so that if no transmissions are received within a defined time period e.g. 1 minute.

My version automatically disconnects.

I do this because, otherwise my battery powered SmartBeacons could go flat if someone used LightBlue etc to connect to them, and didnt send any data.

[ldmxhj]

Taking nRF Toolbox UART as an example. I could see and click to connect the BLE device. On the log it says:" Connecting to: Nordic_UART... centralManager.connect(peripheral,options:nil). The LED on the PCA1004 stays on then stop responding. If I try to send anything from the APP, the log says: "UART RX Characteristic not found". If I use the LightBlue, I couldn't complete the connection process. I got "connection Alert, Timeout interrogating the peripheral" on the log.

[ldmxhj]

Regarding to your beacon solution, the timeout calculation is done at the peripheral side? If it stops the advertisement, I guess you will somehow need to wake it up (maybe by a button pressing?)