Uploader doesn't see service

[sdetweil]

Uploader doesn't see service

[sdetweil]

[vovagorodok]

Not sure, but NimBle by default serve only one connected device at the same time. And if someone (some phone) is connected than no advertising at all. Try disconnect from all devices, maybe reboot device and try again. Remember that phone can try to reconnect automatically

[sdetweil]

yes. once connected. cannot be seen by others.
I was just showing you the service description, which is good. and I can use the read only chars just fine.

so my server is advertising and the service is good

so must be Linux BLE scanner...

the screenshot is from an Android

[vovagorodok]

Try to scan bluetooth devices from your OS directly instead uploader.py

[sdetweil]

i see the same problem on bluetoothctl..

maybe..
my app is connected, status=1
I write a characteristic value
set a future time for switch to upload service
(can't switch while IN the characteristic write callback)
after time switch to upload service

    BLEDevice::stopAdvertising();
    Sprintln("stopping scanner");
    pBLEScanner->stop();
    Sprintln("stopping service");
    activeService[status]->stop();
    Sprintln("deleting service");
    delete activeService[status];
    Sprintln("deleting server");
    delete pServer;
    // remove reference
    pServer = NULL;
    // create a new server object
    pServer = BLEDevice::createServer();
    Sprintln("ble server");
    pServer->setCallbacks(new MyServerCallbacks());

    BLEService *OTAService = ArduinoBleOTA.begin(pServer, InternalStorage, 
                 HW_NAME.c_str(), HW_VER, SW_NAME.c_str(), SW_VER);
    activeService[status] = OTAService;
    Sprintln("restart advertising after resetup");
    pAdvertising->addServiceUUID(OTAService->getUUID());
    pAdvertising->start();

the app did NOT disconnect til eons later
the ESP code did NOT get a disconnect notice
but the server was destroyed and recreated

[sdetweil]

I used bleak to scan
and while the android scanner app sees your service and characteristics, the bleak scanner sees , the prior UUID service

c8:f0:9e:75:1a:26
C8:F0:9E:75:1A:26
{'path': '/org/bluez/hci0/dev_C8_F0_9E_75_1A_26', 'props': {'Address': 'C8:F0:9E:75:1A:26', 'AddressType': 'public', 'Name': 'c8:f0:9e:75:1a:26', 'Alias': 'c8:f0:9e:75:1a:26', 'Paired': False, 'Trusted': False, 'Blocked': False, 'LegacyPairing': False, 'RSSI': -47, 'Connected': False, 'UUIDs': ['11050001-27b9-42f0-82aa-2e951747bbf9'], 'Adapter': '/org/bluez/hci0', 'TxPower': 9, 'ServicesResolved': False}}
{'uuids': ['11050001-27b9-42f0-82aa-2e951747bbf9'], 'manufacturer_data': {}}
-46
ConfigApp

the app

import asyncio
from bleak import BleakScanner

async def main():
        devices = await BleakScanner.discover()
        for device in devices:
                print(device.name)
                print(device.address)
                print(device.details)
                print(device.metadata)
                print(device.rssi)

asyncio.run(main())

[vovagorodok]

Can you show advertising data (not visible services after connect) in android nRF Connect application?

[vovagorodok]

Here what I have:

[sdetweil]

but connect and you see something different

[vovagorodok]

In BLE is difference what services device have and what services device advertise.
Device can have unlimited number of services.
But advertising block is limited and you should chose what to advertise:
#10 (comment)
If device doesn't advertise ota service than script will not find him.

You can remove this filter if you want:

ArduinoBleOTA/tools/uploader.py

Line 76 in 2e2a685

if BLE_OTA_SERVICE_UUID.lower() in dev.uuids:

[sdetweil]

thx, i thought I handled that on the change. I don't see explicit remove (using BLE, see it in Nimble path)

am away til monday

[sdetweil]

actually, that distinction might make this whole thing easier. setup the three services, and just decide which one to advertise. my app discover handler just needs to know the found advertised service's characteristics to use.(which it currently 'assumes').

[vovagorodok]

But remember that it's not safety from security reason. Someone can connect and see that OTA services are available and flash other software.
You can additionally disable uploads and enable only when needed:
https://github.com/vovagorodok/ArduinoBleOTA/blob/main/doc/SECURITY.md#disable-uploads

[sdetweil]

would only be available when my app says upload. not all the time.

then the box reboots and the service goes away til next time it's needed

I would probably change the UUIDs too

[sdetweil]

so I couldn't wait til Sunday and had some time. bought another esp32, and redid the code.

works as you said. what's advertised vs services

[sdetweil]

successful connect and upload!!!

non-nimble!

[sdetweil]

only 764b/s, 24 min 17 sec for 1113712 bytes

doesn't reboot?
I have to do that?

[sdetweil]

so I think I should close this as it was my fault, and fixed. and move to another topic about the finish up. apply/reboot...

[vovagorodok]

so I think I should close this as it was my fault, and fixed. and move to another topic about the finish up. apply/reboot...

Perhaps you forgot ArduinoBleOTA.pull(); in loop()

ArduinoBleOTA.pull() is created in order to perform reboot only when nothing in loop and not incidentally reboot when esp32 do something

[sdetweil]

well, now my system has cached (across boots) the device uuids and the upload service is not visible.
I redid the startup to only have ONE service, and the scan data still has both.

[sdetweil]

ok, figured out how to clear the cache, now get an upload failure using NimBLE

connected  -- my app
lld_pdu_get_tx_flush_nb HCI packet count mismatch (0, 1)
on disconnect start advertising= 15c155ca-36c5-11ed-adc0-9741d6a72f04 -- my app
disconnected -- my app 

[sdetweil]

using non-nimble ESP32 BLE.

Installing. Upload time: 0:05:07.499808
Success!
(base) sam@sams:~/ArduinoBleOTA/tools$ rexx rexxtry say "1138176/((5*60)+07)"
3707.41368

[sdetweil]

to clear cache
stop bluetooth service
delete the cache files (on linux/var/lib/bluetooth) under local device entry/folder)
restart bluetooth service
then can scan
have to do this all the time.

will provide the script (bash) code for this.. (need to test on mac)

[sdetweil]

got nimble working,
Uploaded: 1139200/1139200
Installing. Upload time: 0:01:23.745954

"(1139200/(1*60+23))"

13725/bytes sec

the Nimble author said not to server->addService()

[sdetweil]

I think I can close this now