ble_app_uart example not working properly

[julian24]

Hello everyone,

I'm trying to test the ble_app_uart example. When I download the code into the 52DK, i can see my device show up as a possible connection, but when i connect i can't discover any services.

This is my Debug log:

<info> app_timer: RTC: initialized.
<info> app: Debug logging for UART over RTT started.
<debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.
<debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.
<info> app: Connected
<debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response).
<info> app: Data len is set to 0xF4(244)
<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7
<debug> nrf_ble_gatt: Data length updated to 251 on connection 0x0.
<debug> nrf_ble_gatt: max_rx_octets: 27
<debug> nrf_ble_gatt: max_tx_octets: 251
<debug> nrf_ble_gatt: max_rx_time: 328
<debug> nrf_ble_gatt: max_tx_time: 2120
<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7
<info> app: Disconnected

Does anyone know why this is happening? I'm clearly connecting over BLE, but nothing is shown on my screen and after some time it just disconnects because i'm not sending data.

[Vidar Berg]

Hello,

This example does not support pairing/bonding out of the box, yet the screenshot shows that your phone is bonded with the device. Could this be from a previous connection with your board? Please go to the Bluetooth settings on your phone, forget this device, and try again.

Best regards,

Vidar

[julian24]

thanks! this actually helped, and yes it's from a previous connection. I didn't know this could be an issue, you really helped me here.