UUID advertising not showing on esp32 scan

[lolren]

I'm trying to scan the thermometer with a esp32 for making a simple thermostat. Scanning for the UUID value shows on other devices, but not on the ATC one. This is the ESP32 ble scanner output. Advertised Device: Name: MJ_HT_V1, Address: 58:2d:34:38:be:c2, serviceUUID: 0000180f-0000-1000-8000-00805f9b34fb Advertised Device: Name: Mi Smart Band 5, Address: eb:b3:1c:b3:c7:2a, manufacturer data: 570102ffffffffffffffffffffffffffffffff02ebb31cb3c72a, serviceUUID: 0000fee0-0000-1000-8000-00805f9b34fb Advertised Device: Name: ATC_9D4132, Address: a4:c1:38:9d:41:32 Devices found: 3 Scan done! Am I missing something ? Kind regards,

Loren

[atc1441]

Hey. Have you put it into MiLike advertising via the WebFlasher ?

[michapr]

Device: Name: ATC_9D4132, Address: a4:c1:38:9d:41:32

Isn't it the device you are looking for ? ;)

[lolren]

Here is an Idea. If it's not possible to make the UUID show with the ESP32 ( i notice many people have this problem), what if someone modify the firmware to change the name of the device to the UUID ( and we can process the name to get the values out). The mac will remain the same, so it will be easy to filter the contents.Just an idea ....

[lolren]

Device: Name: ATC_9D4132, Address: a4:c1:38:9d:41:32

Isn't it the device you are looking for ? ;)

yes, it is. but, it does not have a corresponding UUID after, like the rest of the devices

[lolren]

Hey. Have you put it into MiLike advertising via the WebFlasher ? Of course. No change. But, I noticed that other people tried to connect it without success with the esp32. Would it be possible to advertise the data via name change?

[michapr]

I use some of these sensors and have no problem with receiving advertising data. You must not connect to device for this - all will be transferred without connection.

You can use as sample OpenMQTTGateway (or other software)

[lolren]

I use some of these sensors and have no problem with receiving advertising data. You must not connect to device for this - all will be transferred without connection.

You can use as sample OpenMQTTGateway (or other software)

I know. and I don't try to connect to the device. Just trying to get the data via UUID advertising. It doesn't work with the esp32.

[hallard]

I'm using ATC firmware with ESP32 and Micropython (WiPy 3) without any issue, I started with blescan example and then added decoding advertising data class for the sensors project I needed as stated here.

Sorry decoding code is under NDA, can't share, but that's the idea.

[hallard]

Just tried with OpenMQTTGateway on ESP32 sending to MQTT Broker works also like a charm (thanks @lolren for sharing this awesome piece of code)

MQTTExplorer Output

[lolren]

I see. Guess it`s time to learn "micro"Python then. Thank you for the responses. Regards, Loren

[hallard]

If you prefer raw C you can check OpenMQTTGateway :-)

[lixas]

@lolren , This is simple script that shows adv packages on ESP32 micropython terminal. I use it to send known sensors advertisement packages via MQTT messages

NOTE: wait like 30 sec until you see messages in terminal

import ubluetooth, ubinascii
from micropython import const

# known BLE list
sensor_mac_list = [
"aa11bb22cc33",
"dd44ee55ff66"
]

def bt_irq(event, data):
    if event == const(6):       # _IRQ_SCAN_DONE
        print("Completed BLE scanning")
    elif event == const(5):     # _IRQ_SCAN_RESULT:
        addr_type, addr, adv_type, rssi, adv_data = data
        # if ubinascii.hexlify(data[1]).decode("utf-8") in sensor_mac_list:       # uncomment to filter known BLE MAC's if needed
        print('type:{} addr:{} rssi:{} data:{}'.format(addr_type, ubinascii.hexlify(addr), rssi, ubinascii.hexlify(adv_data)))
    else:
        print("Terminated")

ble = ubluetooth.BLE()
ble.active(True)
ble.irq(handler=bt_irq)
ble.gap_scan(0, 10000, 10000)

[lolren]

Thank you. I will try it in my esp32 :+1:

[DavidStacer]

I was able to get the serviceDataUUID and serviceData that contains the advertisement working on a ESP32. https://bitbucket.org/dstacer/workspace/snippets/jBoazB
My knowledge of C++ is very little so code may not be optimal.

[ngxson]

I was able to get the serviceDataUUID and serviceData that contains the advertisement working on a ESP32. https://bitbucket.org/dstacer/workspace/snippets/jBoazB My knowledge of C++ is very little so code may not be optimal.

Thanks for the cue, here is a cleaner version of your script: https://gist.github.com/ngxson/7518f65b9f276dcf6d8c8e6ecd4e8004

The output looks like: Temperature: 22.10*C - Humidity: 60% - Battery: 59%