BLE advertising only advertises Object Transfer Service

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#BLE advertising only advertises Object Transfer Service

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z3ugma 02/07/2024 04:51 AM

For whatever reason, no matter how many times I change my BLE sketch, it only advertises these services as mentioned in the heart_rate BLE sample sketch

Service
#[0x18, 0x25]

Characteristic
#[0x63, 0x4b, 0x3c, 0x6e, 0xac, 0x41, 0x40, 0x85,
0xa9, 0x7c, 0xdd, 0x68, 0x7f, 0xa1, 0xe5, 0x0d]

z3ugma 02/07/2024 04:51 AM

I've now successfully deployed

import ble show *
import uuid show Uuid

RANDOM_UUID1 ::= BleUuid "2a6e01e0-2789-4311-b35b-85fcc8e66b12"
RANDOM_UUID2 ::= BleUuid "f081e493-d276-4018-a6ff-31f887eb1834"
RANDOM_UUID3 ::= BleUuid "f467834d-35d3-42c8-a462-dc6db2d0d709"
RANDOM_UUID4 ::= BleUuid "be11d6d8-0ba8-4181-a0f1-636c555a31e0"

main:
  adapter := Adapter
  adapter.set_preferred_mtu 512
  peripheral := adapter.peripheral

  print "Add Service 1"
  service1 := peripheral.add_service RANDOM_UUID1
  some_characteristic := service1.add_write_only_characteristic RANDOM_UUID2


  print "Add Service 2"
  service2 := peripheral.add_service RANDOM_UUID3
  some_characteristic = service2.add_write_only_characteristic RANDOM_UUID4
  
  print "Deploy Service 1"
  service1.deploy
  print "Deploy Service 2"
  service2.deploy

  connection_mode := BLE_CONNECT_MODE_UNDIRECTIONAL
  peripheral.start_advertise --connection_mode=connection_mode
    AdvertisementData
      --name="Sedisto Door Lock"
      --connectable=true

  print "Advertising!"

  while true:
    print "foo bar"
    sleep --ms=100000

z3ugma 02/07/2024 04:51 AM

but still, when I open the nRFConnect or LightBlue BLE app, it only shows the Object Transfer services advertised

z3ugma 02/07/2024 05:03 AM

I'm specifically trying to do

main:
  adapter := Adapter
  adapter.set_preferred_mtu 512
  peripheral := adapter.peripheral

  print "Add DeviceInformationSerice"
  service1 := peripheral.add_service 
    BleUuid #[0x18, 0x0A]
  some_characteristic := service1.add-read-only-characteristic
    BleUuid #[0x2a, 0x29]
    --value = "Demo".to-byte-array

In the BLE Spec, this is
Service: 180a // DeviceInformationservice 0x180A
Characteristic: 2a29 // ManufacturerNameString 0x2A29

z3ugma 02/07/2024 05:05 AM

Maybe referencing https://github.com/toitlang/toit/issues/974#issuecomment-1286772146 as a possible, relevant comment?

BLE Documentation · Issue #974 · toitlang/toit

Andreas Spiess complains in its Youtube-Review that the Documentation contains a Bluetooth Tutorial but misses to explain or show how to actually transmit data - he failed there (he got only manufa...

z3ugma 02/07/2024 05:18 AM

and a bunch of tasty stacktrace crashing:

Guru Meditation Error: Core  0 panic'ed (LoadProhibited). Exception was unhandled.

Core  0 register dump:
PC      : 0x40122c87  PS      : 0x00060d30  A0      : 0x8012afb4  A1      : 0x3fff6da0  
A2      : 0xf0c8ffff  A3      : 0x3fff6dd4  A4      : 0x00000000  A5      : 0x00000000  
A6      : 0x00000010  A7      : 0x00000000  A8      : 0x80120de7  A9      : 0x3fff6d80  
A10     : 0x3fff503b  A11     : 0x00000002  A12     : 0x00000000  A13     : 0x3fff5018  
A14     : 0x3ffc87fc  A15     : 0x01100004  SAR     : 0x00000018  EXCCAUSE: 0x0000001c  
EXCVADDR: 0xf0c8ffff  LBEG    : 0x4000c349  LEND    : 0x4000c36b  LCOUNT  : 0xffffffff  



******************************************************************************
Backtrace: 0x40122c84:0x3fff6da0 0x4012afb1:0x3fff6dc0 0x4011ec25:0x3fff6e40 0x4011eaeb:0x3fff6e70 0x4011e3b0:0x3fff6ea0 0x4011e3bb:0x3fff6ec0 0x401be923:0x3fff6ee0 0x40089a49:0x3fff6f00 0x400d2f2f:0x3fff6f20 0x400e74b2:0x3fff6f40 0x400e74d9:0x3fff6f60
jag: Failed to decode line.
******************************************************************************





ELF file SHA256: ceb4bed33fee4f08

Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:184
load:0x40078000,len:13240
load:0x40080400,len:2920
entry 0x40080578
[toit] INFO: starting <v2.0.0-alpha.130>
[toit] INFO: running on ESP32 - revision 1.0

OPz3ugma

and a bunch of tasty stacktrace crashing: ``` Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x40122c87 PS...

floitsch 02/07/2024 07:40 AM

Looking.

floitsch 02/07/2024 07:43 AM

The decoded backtrace is:

0x40122c84: ble_uuid_cmp + 0x0
0x4012afb1: ble_att_svr_rx_read_group_type + 0x18d
0x4011ec25: ble_att_rx + 0x5d
0x4011eaeb: ble_hs_hci_evt_acl_process + 0x7b
0x4011e3b0: ble_hs_process_rx_data_queue + 0x10
0x4011e3bb: ble_hs_event_rx_data + 0x3
0x401be923: npl_freertos_event_run + 0xb
0x40089a49: nimble_port_run + 0x25
0x400d2f2f: non-virtual thunk to toit::BleResourceGroup::entry() + 0x3
0x400e74b2: toit::Thread::_boot() + 0x22
0x400e74d9: toit::esp_thread_start(void*) + 0x5

Will try to figure out what went wrong.

floitsch 02/07/2024 07:51 AM

Can you reproduce the crash?
It's somewhere in the Nimble code, and a repro would help a lot...

floitsch 02/07/2024 08:01 AM

Ok. It seems like I can reproduce the crash.
Now let's see if I can fix it...

floitsch 02/07/2024 10:28 AM

I think we are hitting again https://github.com/toitlang/toit/issues/1660
Fixing this would require a bigger rewrite of the BLE layer...

BLE service.deploy crashes if a second service gets added · Issue #...

If I create multiple services for an BLE peripheral I can always only add one service to it. Adding and deploying a second one always crashes with a core-panic. s1 := peripheral.add_service uuid1 /...

11 messages in total