For info, I'm able to list all GATT services and characteristics from this device when using nRF Master Control Panel Android app. On Fri, Feb 12, 2016 at 2:38 PM, François Beaufort <beaufort.francois@xxxxxxxxx> wrote: > Hello! I use BlueZ 5.35 and I'd love your help. > Can you help me understand why list-attributes doesn't return anything > and the "GattServices is nil" message? > > Here's my bluetoothctl logs: > > [bluetooth]# connect F1:6F:DE:EC:F1:D6 > Attempting to connect to F1:6F:DE:EC:F1:D6 > [CHG] Device F1:6F:DE:EC:F1:D6 Connected: yes > Connection successful > [CHG] Device F1:6F:DE:EC:F1:D6 GattServices is nil > [DFU_Test]# list-attributes > [DFU_Test]# info > Device F1:6F:DE:EC:F1:D6 > Name: DFU_Test > Alias: DFU_Test > Appearance: 0x0340 > Paired: no > Trusted: no > Blocked: no > Connected: yes > LegacyPairing: no > UUID: Heart Rate (0000180d-0000-1000-8000-00805f9b34fb) > UUID: Device Information (0000180a-0000-1000-8000-00805f9b34fb) > > And here are my btmon logs in case it would help: > > < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7 [hci0] 49.518076 > Type: Passive (0x00) > Interval: 60.000 msec (0x0060) > Window: 30.000 msec (0x0030) > Own address type: Public (0x00) > Filter policy: Ignore not in white list (0x01) >> HCI Event: Command Complete (0x0e) plen 4 [hci0] 49.518952 > LE Set Scan Parameters (0x08|0x000b) ncmd 1 > Status: Success (0x00) > < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 49.518981 > Scanning: Enabled (0x01) > Filter duplicates: Enabled (0x01) >> HCI Event: Command Complete (0x0e) plen 4 [hci0] 49.519952 > LE Set Scan Enable (0x08|0x000c) ncmd 1 > Status: Success (0x00) >> HCI Event: LE Meta Event (0x3e) plen 36 [hci0] 52.188030 > LE Advertising Report (0x02) > Num reports: 1 > Event type: Connectable undirected - ADV_IND (0x00) > Address type: Random (0x01) > Address: F1:6F:DE:EC:F1:D6 (Static) > Data length: 24 > Flags: 0x06 > LE General Discoverable Mode > BR/EDR Not Supported > 16-bit Service UUIDs (complete): 2 entries > Heart Rate (0x180d) > Device Information (0x180a) > Appearance: Heart Rate Sensor (0x0340) > Name (complete): DFU_Test > RSSI: -31 dBm (0xe1) > < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 52.188143 > Scanning: Disabled (0x00) > Filter duplicates: Disabled (0x00) >> HCI Event: Command Complete (0x0e) plen 4 [hci0] 52.188957 > LE Set Scan Enable (0x08|0x000c) ncmd 1 > Status: Success (0x00) > < HCI Command: LE Create Connection (0x08|0x000d) plen 25 [hci0] 52.189058 > Scan interval: 60.000 msec (0x0060) > Scan window: 30.000 msec (0x0030) > Filter policy: White list is not used (0x00) > Peer address type: Random (0x01) > Peer address: F1:6F:DE:EC:F1:D6 (Static) > Own address type: Public (0x00) > Min connection interval: 50.00 msec (0x0028) > Max connection interval: 70.00 msec (0x0038) > Connection latency: 0x0000 > Supervision timeout: 420 msec (0x002a) > Min connection length: 0.000 msec (0x0000) > Max connection length: 0.000 msec (0x0000) >> HCI Event: Command Status (0x0f) plen 4 [hci0] 52.189955 > LE Create Connection (0x08|0x000d) ncmd 1 > Status: Success (0x00) > < HCI Command: LE Create Connection Can.. (0x08|0x000e) plen 0 [hci0] 54.195731 >> HCI Event: LE Meta Event (0x3e) plen 19 [hci0] 54.195946 > LE Connection Complete (0x01) > Status: Success (0x00) > Handle: 32 > Role: Master (0x00) > Peer address type: Random (0x01) > Peer address: F1:6F:DE:EC:F1:D6 (Static) > Connection interval: 67.50 msec (0x0036) > Connection latency: 0.00 msec (0x0000) > Supervision timeout: 420 msec (0x002a) > Master clock accuracy: 0x00 > @ Device Connected: F1:6F:DE:EC:F1:D6 (2) flags 0x0000 > 02 01 06 05 03 0d 18 0a 18 03 19 40 03 0a 09 44 ...........@...D > 46 55 5f 54 65 73 74 00 FU_Test. >> HCI Event: Command Complete (0x0e) plen 4 [hci0] 54.196928 > LE Create Connection Cancel (0x08|0x000e) ncmd 1 > Status: Command Disallowed (0x0c) > < HCI Command: LE Read Remote Used Feat.. (0x08|0x0016) plen 2 [hci0] 54.197004 > Handle: 32 >> HCI Event: Command Status (0x0f) plen 4 [hci0] 54.197929 > LE Read Remote Used Features (0x08|0x0016) ncmd 1 > Status: Success (0x00) >> HCI Event: LE Meta Event (0x3e) plen 12 [hci0] 54.330960 > LE Read Remote Used Features (0x04) > Status: Success (0x00) > Handle: 32 > Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 > LE Encryption > < ACL Data TX: Handle 32 flags 0x00 dlen 7 [hci0] 54.332123 > ATT: Exchange MTU Request (0x02) len 2 > Client RX MTU: 517 >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 54.397976 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 7 [hci0] 54.465099 > ATT: Exchange MTU Response (0x03) len 2 > Server RX MTU: 23 > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 54.465342 > ATT: Read By Group Type Request (0x10) len 6 > Handle range: 0x0001-0xffff > Attribute group type: Primary Service (0x2800) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 54.532926 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 18 [hci0] 54.600225 > ATT: Read By Group Type Response (0x11) len 13 > Attribute data length: 6 > Attribute group list: 2 entries > Handle range: 0x0001-0x0007 > UUID: Generic Access Profile (0x1800) > Handle range: 0x0008-0x000b > UUID: Generic Attribute Profile (0x1801) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 54.600402 > ATT: Read By Group Type Request (0x10) len 6 > Handle range: 0x000c-0xffff > Attribute group type: Primary Service (0x2800) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 54.667973 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 26 [hci0] 54.735207 > ATT: Read By Group Type Response (0x11) len 21 > Attribute data length: 20 > Attribute group list: 1 entry > Handle range: 0x000c-0x0011 > UUID: Unknown (00001530-1212-efde-1523-785feabcd123) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 54.735408 > ATT: Read By Group Type Request (0x10) len 6 > Handle range: 0x0012-0xffff > Attribute group type: Primary Service (0x2800) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 54.802940 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 18 [hci0] 54.937705 > ATT: Read By Group Type Response (0x11) len 13 > Attribute data length: 6 > Attribute group list: 2 entries > Handle range: 0x0012-0x0019 > UUID: Heart Rate (0x180d) > Handle range: 0x001a-0xffff > UUID: Device Information (0x180a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 54.937991 > ATT: Read By Group Type Request (0x10) len 6 > Handle range: 0x0001-0xffff > Attribute group type: Secondary Service (0x2801) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.005936 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.072581 > ATT: Error Response (0x01) len 4 > Read By Group Type Request (0x10) > Handle: 0x0001 > Error: Attribute Not Found (0x0a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.072850 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x0008-0x000b > Attribute type: Include (0x2802) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.140972 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.207582 > ATT: Error Response (0x01) len 4 > Read By Type Request (0x08) > Handle: 0x0008 > Error: Attribute Not Found (0x0a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.207940 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x000c-0x0011 > Attribute type: Include (0x2802) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.275954 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.342564 > ATT: Error Response (0x01) len 4 > Read By Type Request (0x08) > Handle: 0x000c > Error: Attribute Not Found (0x0a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.342855 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x0012-0x0019 > Attribute type: Include (0x2802) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.410939 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.477547 > ATT: Error Response (0x01) len 4 > Read By Type Request (0x08) > Handle: 0x0012 > Error: Attribute Not Found (0x0a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.477794 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x001a-0xffff > Attribute type: Include (0x2802) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.545967 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.612685 > ATT: Error Response (0x01) len 4 > Read By Type Request (0x08) > Handle: 0x001a > Error: Attribute Not Found (0x0a) > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.612878 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x0008-0x000b > Attribute type: Characteristic (0x2803) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.680951 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 13 [hci0] 55.747715 > ATT: Read By Type Response (0x09) len 8 > Attribute data length: 7 > Attribute data list: 1 entry > Handle: 0x0009 > Value: 200a00052a > < ACL Data TX: Handle 32 flags 0x00 dlen 11 [hci0] 55.747892 > ATT: Read By Type Request (0x08) len 6 > Handle range: 0x000a-0x000b > Attribute type: Characteristic (0x2803) >> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 55.815954 > Num handles: 1 > Handle: 32 > Count: 1 >> ACL Data RX: Handle 32 flags 0x02 dlen 9 [hci0] 55.882715 > ATT: Error Response (0x01) len 4 > Read By Type Request (0x08) > Handle: 0x000a > Error: Attribute Not Found (0x0a) -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at 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