ble_spp_server_demo device association fail

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accacca
Posts: 34
Joined: Mon Aug 06, 2018 4:59 pm

ble_spp_server_demo device association fail

Postby accacca » Wed May 10, 2023 12:13 pm

I wanted to test the bluetooth connection between my ESP32S3 WROOM 1 module and the PC (WIN10).
I used the BLE_SPP_server example compiled and loaded into the module.
PC sees the device with name ESP_SPP_SERVER but cannot connect.
I also tried with a phone (Honor 7C) and equally the device is seen but not connected
I have to change something in the code?
Thanks

Logs:

After reset

Code: Select all

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0xb (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3810,len:0x1648
load:0x403c9700,len:0xbe0
load:0x403cc700,len:0x2ef8
entry 0x403c9900
I (25) boot: ESP-IDF v5.0.1 2nd stage bootloader 
I (25) boot: compile time 12:37:02
I (25) boot: chip revision: v0.1
I (27) boot.esp32s3: Boot SPI Speed : 80MHz      
I (31) boot.esp32s3: SPI Mode       : DIO        
I (36) boot.esp32s3: SPI Flash Size : 2MB        
I (41) boot: Enabling RNG early entropy source...
I (46) boot: Partition Table:
I (50) boot: ## Label            Usage          Type ST Offset   Length  
I (57) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (65) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (72) boot:  2 factory          factory app      00 00 00010000 00100000
I (80) boot: End of partition table
I (84) esp_image: segment 0: paddr=00010020 vaddr=3c090020 size=2f014h (192532) map
I (127) esp_image: segment 1: paddr=0003f03c vaddr=3fc97000 size=00fdch (  4060) load
I (128) esp_image: segment 2: paddr=00040020 vaddr=42000020 size=86af8h (551672) map
I (231) esp_image: segment 3: paddr=000c6b20 vaddr=3fc97fdc size=02600h (  9728) load
I (234) esp_image: segment 4: paddr=000c9128 vaddr=40374000 size=12fd0h ( 77776) load
I (262) boot: Loaded app from partition at offset 0x10000
I (262) boot: Disabling RNG early entropy source...
I (274) cpu_start: Pro cpu up.
I (274) cpu_start: Starting app cpu, entry point is 0x40375400
0x40375400: call_start_cpu1 at F:/ub/hw/micro/Espressif/frameworks/esp-idf-v5.0/esp-idf/components/esp_system/port/cpu_start.c:142

I (0) cpu_start: App cpu up.
I (288) cpu_start: Pro cpu start user code
I (288) cpu_start: cpu freq: 160000000 Hz
I (288) cpu_start: Application information:
I (291) cpu_start: Project name:     ble_spp_server_demo
I (297) cpu_start: App version:      1
I (302) cpu_start: Compile time:     May 10 2023 12:35:20
I (308) cpu_start: ELF file SHA256:  5ce07fbd36c23ee7...
I (314) cpu_start: ESP-IDF:          v5.0.1
I (319) cpu_start: Min chip rev:     v0.0
I (323) cpu_start: Max chip rev:     v0.99 
I (328) cpu_start: Chip rev:         v0.1
I (333) heap_init: Initializing. RAM available for dynamic allocation:
I (340) heap_init: At 3FCAA4C0 len 0003F250 (252 KiB): D/IRAM
I (347) heap_init: At 3FCE9710 len 00005724 (21 KiB): STACK/DRAM
I (353) heap_init: At 3FCF0000 len 00008000 (32 KiB): DRAM
I (359) heap_init: At 600FE010 len 00001FF0 (7 KiB): RTCRAM
I (367) spi_flash: detected chip: generic
I (371) spi_flash: flash io: dio
W (374) spi_flash: Detected size(8192k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (388) coexist: coexist rom version e7ae62f
I (393) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (460) BT_INIT: BT controller compile version [80abacd]
I (460) phy_init: phy_version 540,a5d905b,Oct 20 2022,19:36:11
I (500) system_api: Base MAC address is not set
I (500) system_api: read default base MAC address from EFUSE
I (500) BT_INIT: Bluetooth MAC: 7c:df:a1:e3:6b:fa

I (510) GATTS_SPP_DEMO: app_main init bluetooth

I (520) BT_BTM: btm_sec_set_security_level : sec: 0x0

I (520) BT_BTM: BTM_SEC_REG[0]: id 50, is_orig 1, psm 0x001f, proto_id 0, chan_id 0

I (530) BT_BTM:                : sec: 0x80, service name [] (up to 21 chars saved)

I (540) BT_BTM: btm_sec_set_security_level : sec: 0x0

I (540) BT_BTM: BTM_SEC_REG[0]: id 50, is_orig 0, psm 0x001f, proto_id 0, chan_id 0

I (550) BT_BTM:                : sec: 0x80, service name [] (up to 21 chars saved)

I (560) BT_GATT: GATT_Register
I (560) BT_GATT: allocated gatt_if=1

I (570) BT_GATT: GATT_StartIf gatt_if=1
I (570) BT_GATT: GATTS_CreateService

I (580) BT_GATT: GATTS_StartService
I (580) BT_GATT: GATT_Register
I (580) BT_GATT: allocated gatt_if=2

I (590) BT_GATT: GATT_StartIf gatt_if=2
I (590) BT_GATT: GATTS_CreateService

I (600) BT_GATT: GATTS_StartService
I (620) BT_BTM: BTM_SetPageScanType

I (620) BT_BTM: BTM_SetInquiryScanType

I (620) BT_GATT: GATT_Register
I (620) BT_GATT: allocated gatt_if=3

I (630) BT_GATT: GATT_StartIf gatt_if=3
I (630) GATTS_SPP_DEMO: EVT 0, gatts if 3

I (640) GATTS_SPP_DEMO: event = 0

I (640) GATTS_SPP_DEMO: gatts_profile_event_handler 493

I (650) GATTS_SPP_DEMO: gatts_profile_event_handler 496

I (650) GATTS_SPP_DEMO: gatts_profile_event_handler 499

I (660) BT_GATT: GATTS_CreateService

I (670) GATTS_SPP_DEMO: EVT 22, gatts if 3

I (670) GATTS_SPP_DEMO: event = 16

I (670) GATTS_SPP_DEMO: The number handle =b

E (680) GATTS_SPP_DEMO: GAP_EVT, event 4

I (680) BT_GATT: GATTS_StartService
I (690) BT_APPL: BTA_DmSetBleAdvParamsAll: 32, 64

I (690) BT_APPL: adv_type = 0, addr_type_own = 0, chnl_map = 7, adv_fil_pol = 0

I (700) GATTS_SPP_DEMO: EVT 12, gatts if 3

I (700) GATTS_SPP_DEm�I
when I try t connect

Code: Select all

 
 ......
 ......
 
(700) GATTS_SPP_DEm�I (9270) BT_BTM: BTM_InqDbRead: bd addr [30e37a983d7e]

I (9380) BT_GATT: GATT_GetConnIdIfConnected status=1

I (9380) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (9390) BT_GATT: GATT_GetConnectionInfor conn_id=3
I (9390) BT_L2CAP: L2CA_SetDesireRole() new:x1, disallow_switch:0
I (9400) GATTS_SPP_DEMO: EVT 14, gatts if 3

I (9400) GATTS_SPP_DEMO: event = e

I (9410) GATTS_SPP_DEMO: EVT 4, gatts if 3

I (9410) GATTS_SPP_DEMO: event = 4

E (9440) GATTS_SPP_DEMO: GAP_EVT, event 10

I (9500) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (9620) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (9740) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (9860) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (9980) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10100) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10220) BT_GATT: GATTS_SendRsp: conn_id: 1  trans_id: 1  Status: 0x0000

I (10220) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10340) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10460) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10580) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10700) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10820) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (10940) BT_GATT: GATTS_SendRsp: conn_id: 2  trans_id: 2  Status: 0x0000

I (10940) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (11060) BT_GATT: GATTS_SendRsp: conn_id: 2  trans_id: 3  Status: 0x0000

I (11060) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (11180) BT_GATT: GATTS_SendRsp: conn_id: 2  trans_id: 4  Status: 0x0000

I (11180) BT_L2CAP: L2CA_SendFixedChnlData()  CID: 0x0004  BDA: 30e37a983d7e
I (39370) BT_GATT: GATT_GetConnIdIfConnected status=0

I (39370) BT_BTM: BTM_InqDbRead: bd addr [30e37a983d7e]

I (39370) BT_BTM: BTM_IsAclConnectionUp: RemBdAddr: 30e37a983d7e

E (39370) BT_BTM: Device not found

W (39380) BT_HCI: hcif disc complete: hdl 0x1, rsn 0x13
I (39380) BT_BTM: BTM_IsAclConnectionUp: RemBdAddr: 30e37a983d7e

I (39390) BT_L2CAP: L2CA_SetDesireRole() new:x1, disallow_switch:0
I (39400) GATTS_SPP_DEMO: EVT 15, gatts if 3

I (39400) GATTS_SPP_DEMO: event = f

E (39410) GATTS_SPP_DEMO: GAP_EVT, event 8

I (39410) BT_APPL: BTA_DmSetBleAdvParamsAll: 32, 64

I (39420) BT_APPL: adv_type = 0, addr_type_own = 0, chnl_map = 7, adv_fil_pol = 0

E (39430) GATTS_SPP_DEMO: GAP_EVT, event 6
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MicroController
Posts: 1216
Joined: Mon Oct 17, 2022 7:38 pm
Location: Europe, Germany

Re: ble_spp_server_demo device association fail

Postby MicroController » Wed May 10, 2023 9:25 pm

The issue may be that there is no BLE-SPP standard. Hence, every device can/must implement its own emulation of the "SPP" protocol, and use custom UUIDs for the attributes involved. The BLE-SPP example uses non-standard UUIDs starting from 0xABF0, and custom messages in the exchange. For these reasons, there is no standard BLE-SPP device (driver) for PCs or phones and these clients won't recognize the service(s) provided by your ESP.

You can somewhat test your BLE-SPP application using the Nordic NRF Connect app, or Microsoft's "Bluetooth LE Explorer".

Then there is the Nordic NRF BLE-SPP example which is used by many makers/hobbyists and may have some support with certain apps.
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accacca
Posts: 34
Joined: Mon Aug 06, 2018 4:59 pm

Re: ble_spp_server_demo device association fail

Postby accacca » Thu May 11, 2023 7:15 am

Thanks MicroController for infos.
I solved,
As you say, the problem is not related to the ESP example but in the program I was using to connect to ESP32
I use this app
https://play.google.com/store/apps/deta ... l=it&gl=US

Scan could not find any devices. To do this it requires to enable phone location access....
As soon as I enabled location access the scan found the device.
The program allows you to configure the custom device by assigning UUIDs and now it works correctly
thanks again for the support
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