Hi, I'm having issues connecting to the ble_app_ots example application from the nrf connect phone app. I have attached a trace from wireshark, and for comparison what it looks like when connecting to the Nordic Uart Service (NUS). It looks like the response differs between OTS and NUS after the LL_FEATURE_REQ and after the master sends LL_LENGTH_REQ nothing happens for 40 seconds and then I get GATT CONN LMP TIMEOUT when looking in the log on the nrf connect app.
I would have thought that I should be able to connect and explore characteristics even if the OTS l2cap channel is not present on the nrf connect app, but maybe I'm mistaken there?
Any input on what I'm missing and that makes the behaviour differ between OTS and NUS when connecting would be much appreciated.
Kind regards
ozh
No. Time Source Destination Protocol Length Info 5465 105.698317 65:bf:a3:e7:7f:32 e8:44:d8:19:ad:7f LE LL 60 CONNECT_REQ Frame 5465: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 5466 105.708927 Master_0x783cd427 Slave_0x783cd427 LE LL 35 Control Opcode: LL_FEATURE_REQ Frame 5466: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 5469 105.779821 Slave_0x783cd427 Master_0x783cd427 LE LL 35 Control Opcode: LL_FEATURE_RSP Frame 5469: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 5470 105.814756 Master_0x783cd427 Slave_0x783cd427 LE LL 35 Control Opcode: LL_LENGTH_REQ Frame 5470: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer
No. Time Source Destination Protocol Length Info 9961 184.766929 73:fd:ca:94:95:74 e8:44:d8:19:ad:7f LE LL 60 CONNECT_REQ Frame 9961: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9962 184.772715 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 LE LL 35 Control Opcode: LL_FEATURE_REQ Frame 9962: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9963 184.774015 Slave_0x1ab5a9e3 Master_0x1ab5a9e3 ATT 33 Rcvd Exchange MTU Request, Client Rx MTU: 247 Frame 9963: 33 bytes on wire (264 bits), 33 bytes captured (264 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9964 184.842795 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 ATT 33 Sent Exchange MTU Response, Server Rx MTU: 247 Frame 9964: 33 bytes on wire (264 bits), 33 bytes captured (264 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9965 184.843891 Slave_0x1ab5a9e3 Master_0x1ab5a9e3 LE LL 35 Control Opcode: LL_FEATURE_RSP Frame 9965: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9966 184.844648 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 ATT 37 Sent Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff Frame 9966: 37 bytes on wire (296 bits), 37 bytes captured (296 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9967 184.863808 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 ATT 37 Sent Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x0001..0xffff Frame 9967: 37 bytes on wire (296 bits), 37 bytes captured (296 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9969 184.865618 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_REQ Frame 9969: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9970 184.934204 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_REQ Frame 9970: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9971 184.935265 Slave_0x1ab5a9e3 Master_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_REQ Frame 9971: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9974 184.955698 Slave_0x1ab5a9e3 Master_0x1ab5a9e3 ATT 44 Rcvd Read By Group Type Response, Attribute List Length: 2, Generic Access Profile, Generic Attribute Profile Frame 9974: 44 bytes on wire (352 bits), 44 bytes captured (352 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9975 184.956372 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_RSP Frame 9975: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9976 185.022068 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_RSP Frame 9976: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9977 185.023045 Slave_0x1ab5a9e3 Master_0x1ab5a9e3 LE LL 35 Control Opcode: LL_LENGTH_RSP Frame 9977: 35 bytes on wire (280 bits), 35 bytes captured (280 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer No. Time Source Destination Protocol Length Info 9978 185.023935 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 ATT 37 Sent Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x000b..0xffff Frame 9978: 37 bytes on wire (296 bits), 37 bytes captured (296 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol No. Time Source Destination Protocol Length Info 9979 185.042930 Master_0x1ab5a9e3 Slave_0x1ab5a9e3 ATT 37 Sent Read By Group Type Request, GATT Primary Service Declaration, Handles: 0x000b..0xffff Frame 9979: 37 bytes on wire (296 bits), 37 bytes captured (296 bits) on interface 0 Nordic BLE Sniffer Bluetooth Low Energy Link Layer Bluetooth L2CAP Protocol Bluetooth Attribute Protocol
