BLE connection problems with some Android devices

[John Henschel Jr]

I'm using nRF5340 to provide Bluetooth connection to other devices. Almost all Android devices connect correctly, for example: Samsung S21, LG G8X, Xiaomi Mi Mix 2.  However, there are devices don't connect, for example: Zen Fone 4, Xiaomi Mi Mix 3. Could you please help me to debug?

[JONATHAN LL]

Hi,

Is it a custom board?

Can you provide a sniffer trace?

Regards,
Jonathan

[Bruno Saraiva]

Hi Jonathan, I'm part of this development group as well.

Can the nRF5340-PDK board be used with the Sniffer tool? If not, maybe the nRF5340-DK?
I looked at the list of boards here and those are not included, although I suspect they have the necessary hardware.
https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE
Regards

Bruno

[JONATHAN LL]

Hi Bruno,

There is no support for the nrf53 in nRF sniffer at the moment. 

You can check out the dongle: Buy Nordic Semiconductor products online - nordicsemi.com


if it is a custom board\device are you using external crystals or the internal ?

Regards,
Jonathan

[Bruno Saraiva]

It is a custom board, but the nRF IC is pre-assembled in a Fanstel BT40E module.
As for sniffing, I'll ask my colleague to check if he has a nRF52840 board at hand and we will get back here, just so that we can have some progress before waiting for the delivery of a dongle.

[JONATHAN LL]

Oki thanks for the update. 

As for reason to why some  phones might not work is because if the clock on the device is on the edge of what is ok and the phone is also somewhat inaccurate then the difference might be to big and the devices are not able to properly communicate.  Sometimes phones use some cheaper components and the tolerances are not as good.  This might be one reason for why Zen Fone 4, Xiaomi Mi Mix 3 do not seem to connect. 

Where you able to test with more than one Zen Fone 4and Xiaomi Mi Mix 3 ?

Regards,
Jonathan

[John Henschel Jr]

Hi, Jonathan!

We sniffered our BLE connection problem. I will add here our rtt_viewer_log and our nRF_connect_log (nRF Connect Desktop).  

Could you please verify? Thanks!

Fullscreen rtt_viewer_log.log Download

# SEGGER J-Link RTT Viewer V7.54 Terminal Log File
# Compiled: 10:44:59 on Sep  1 2021
# Logging started @ 20 Sep 2021 19:15:00
00> [00:00:00.156,829] <err> i2c_nrfx_twim: Error 195952641 occurred for message 1
00> [00:00:00.156,860] <err> ssd1306: Failed to initialize device!
00> [00:00:00.164,642] <inf> BNO055: initializing BNO055
00> [00:00:00.568,542] <inf> BNO055: CHIP ID OK (BNO055)
00> [00:00:00.569,396] <inf> BNO055: ACCEL ID OK (BNO055)
00> [00:00:00.570,281] <inf> BNO055: MAG ID OK (BNO055)
00> [00:00:00.571,166] <inf> BNO055: GYRO ID OK (BNO055)
00> [00:00:00.572,906] <inf> BNO055: SW Rev: 785
00> [00:00:00.573,791] <inf> BNO055: Boot Loader Rev: 21
00> [00:00:00.625,915] <inf> BNO055: Calibration reg read 0
00> [00:00:00.684,234] <inf> BNO055: Calibration reg read 0
00> [00:00:00.684,265] <inf> BNO055: Magnetometer: 0 Accelerometer: 0 Gyroscope: 0 System: 0
00> 
00> [00:00:00.684,265] <inf> BNO055: BNO055 OK
00> [00:00:00.684,356] <inf> IIS2ICLX: chip id 0xff
00> [00:00:00.684,356] <err> IIS2ICLX: Invalid chip id 0xff
00> [00:00:00.684,356] <err> IIS2ICLX: failed to initialize chip
00> ***** delaying boot 300ms (per build configuration) *****
00> 
00> *** Booting Zephyr OS build v2.4.99-ncs2  (delayed boot 300ms) ***
00> 
00> [00:00:00.980,377] <err> lvgl: Display device not found.
00> [00:00:00.981,506] <inf> MAIN_APP: Main initializing...
00> [00:00:00.981,506] <inf> MAIN_APP: ============================================
00> [00:00:00.981,506] <inf> MAIN_APP: Firmware. nRF53 serial df1c92b33463b374
00> [00:00:00.981,506] <inf> MAIN_APP: Hardware. nRF53 Rev 00005340 514b4141
00> [00:00:00.981,536] <inf> MAIN_APP: ============================================
00> [00:00:00.981,536] <inf> MAIN_APP: Reset by pin-reset
00> [00:00:00.981,597] <inf> MAIN_APP: CPU Clock HW Cycles pes sec 32768
00> [00:00:00.981,597] <inf> MAIN_APP: CPU System Clock 64000000
00> [00:00:00.981,628] <inf> MAIN_APP: Version 270
00> [00:00:00.981,689] <inf> thread_analyzer: Thread analyze:
00> [00:00:00.981,781] <inf> thread_analyzer:  thread_analyzer     : STACK: unused 349 usage 163 / 512 (31 %); CPU: 0 %
00> [00:00:00.982,055] <inf> thread_analyzer:  rtc_id              : STACK: unused 2012 usage 36 / 2048 (1 %); CPU: 0 %
00> [00:00:00.982,330] <inf> thread_analyzer:  led_rgb_thd_id      : STACK: unused 2012 usage 36 / 2048 (1 %); CPU: 0 %
00> [00:00:00.982,452] <inf> thread_analyzer:  flash_id            : STACK: unused 988 usage 36 / 1024 (3 %); CPU: 0 %
00> [00:00:00.982,696] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 1868 usage 180 / 2048 (8 %); CPU: 0 %
00> [00:00:00.982,849] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 988 usage 36 / 1024 (3 %); CPU: 0 %
00> [00:00:00.983,062] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 1788 usage 260 / 2048 (12 %); CPU: 0 %
00> [00:00:00.983,337] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 1908 usage 140 / 2048 (6 %); CPU: 0 %
00> [00:00:00.983,551] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 1508 usage 540 / 2048 (26 %); CPU: 5 %
00> [00:00:00.983,673] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 948 usage 76 / 1024 (7 %); CPU: 63 %
00> [00:00:00.983,856] <inf> thread_analyzer:  <log_strdup alloc failed>: STACK: unused 1428 usage 620 / 2048 (30 %); CPU: 30 %
00> [00:00:01.234,069] <inf> E2PROM: EEPROM Content
00>                                  81 11 35 57 0e 00 00 00  50 01 00 00 00 47 46 44 |..5W.... P....GFD
00>                                  36 30 36 37 30 33 34 03  c8 00 00 00 00 00 00 00 |6067034. ........
00>                                  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 |........ ........
00>                                  00 00 00 00 00 00 00 00  00 00 00 00 a0 40 1e 00 |........ .....@..
00>                                  00 00 00 40 90 00 00 00  00 00 00 00 00 00 00 00 |...@.... ........
00>                                  00 4c ff 00 03 10 00 64  66 31 63 39 32 62 33 33 |.L.....d fm
00> [0m
00> 0m
00> [00:00:02.945,190] <inf> BLE_APP: call_infinity BLE Index 0
00> 
00> [00:00:02.945,251] <inf> BLE_APP: advertise_start-------------------------------------------------------1
00> [00:00:02.948,699] <inf> BLE_APP: Advertising successfully started
00> 
00> [00:00:02.948,760] <inf> BLE_APP: Starting BLE_INFINITY thread!
00> 
00> Cycles: 25
00> 
00> Cycles: 27
00> 
00> Cycles: 29
00> 
00> Cycles: 32
00> 
00> Cycles: 35
00> 
00> Cycles: 38
00> 
00> Cycles: 40
00> 
00> Cycles: 43
00> 
00> Cycles: 45
00> 
00> Cycles: 48
00> 
00> Cycles: 51
00> 
00> Cycles: 53
00> 
00> Cycles: 56
00> 
00> Cycles: 58
00> 
00> Cycles: 61
00> 
00> [00:00:17.008,819] <inf> BLE_APP: Connection type: Slave 139
00> 
00> [00:00:17.008,972] <inf> BLE_APP: Try Connected: 6A:F1:60:82:D3:C9 (random), index: 0,
00> [00:00:17.008,972] <inf> BLE_APP: Connected: 6A:F1:60:82:D3:C9 (random), index: 0,
00> [00:00:17.009,002] <inf> BLE_APP: Connected: 6A:F1:60:82:D3:C9 (random), tx_phy LE 1M, rx_phy LE 1M
00> 
00> [00:00:17.009,002] <inf> BLE_APP: advertise_start-------------------------------------------------------1
00> [00:00:17.009,002] <err> BLE_APP: Advertising failed to start (err -120)
00> 
00> [00:00:17.493,591] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 64
00> 
00> [00:00:18.798,522] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 66
00> 
00> [00:00:19.743,499] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 68
00> 
00> [00:00:20.733,520] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 71
00> 
00> [00:00:21.678,497] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 73
00> 
00> [00:00:22.488,555] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 75
00> 
00> [00:00:23.433,532] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 78
00> 
00> [00:00:24.513,641] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 80
00> 
00> Cycles: 82
00> 
00> Cycles: 85
00> 
00> [00:00:27.573,638] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 88
00> 
00> [00:00:28.428,588] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 90
00> 
00> [00:00:29.418,609] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 93
00> 
00> [00:00:30.183,593] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 96
00> 
00> [00:00:31.083,557] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> [00:00:31.713,592] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 98
00> 
00> Cycles: 100
00> 
00> Cycles: 103
00> 
00> [00:00:34.863,952] <inf> BLE_APP: Disconnected (reason 0x13)
00> 
00> [00:00:34.863,952] <inf> BLE_APP: disconnected-------------------------------------------------------3
00> [00:00:34.863,952] <inf> BLE_APP: advertise_start-------------------------------------------------------1
00> [00:00:34.863,983] <err> BLE_APP: Advertising failed to start (err -120)
00> 
00> Cycles: 106
00> 
00> [00:00:35.204,620] <inf> BLE_APP: Connection type: Slave 139
00> 
00> [00:00:35.204,742] <inf> BLE_APP: Try Connected: 6A:F1:60:82:D3:C9 (random), index: 1,
00> [00:00:35.204,742] <inf> BLE_APP: Connected: 6A:F1:60:82:D3:C9 (random), index: 1,
00> [00:00:35.204,772] <inf> BLE_APP: Connected: 6A:F1:60:82:D3:C9 (random), tx_phy LE 1M, rx_phy LE 1M
00> 
00> [00:00:35.204,772] <inf> BLE_APP: advertise_start-------------------------------------------------------1
00> [00:00:35.204,803] <err> BLE_APP: Advertising failed to start (err -120)
00> 
00> [00:00:35.583,709] <inf> BLE_APP: Security failed: 6A:F1:60:82:D3:C9 (random) level 1 err 8
00> 
00> Cycles: 109
00> 
00> Cycles: 112
00> 
00> Cycles: 115
00> 
00> [00:00:38.688,995] <inf> BLE_APP: Disconnected (reason 0x13)
00> 
00> [00:00:38.689,025] <inf> BLE_APP: disconnected-------------------------------------------------------3
00> [00:00:38.689,025] <inf> BLE_APP: advertise_start-------------------------------------------------------1
00> [00:00:38.689,025] <err> BLE_APP: Advertising failed to start (err -120)
00> 
00> Cycles: 119
00> 

# Logging stopped @ 20 Sep 2021 19:15:47

nRF_connect_log_2021-09-20T21_54_44.619Z-log.txt