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Bluetooth PHY switching using nRF Connect. After disconnecting there is a problem with finding the thermometer. Bug? #302

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DienoX opened this issue Feb 28, 2023 · 3 comments
Closed

Bluetooth PHY switching using nRF Connect. After disconnecting there is a problem with finding the thermometer. Bug? #302

DienoX opened this issue Feb 28, 2023 · 3 comments

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@DienoX
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DienoX commented Feb 28, 2023

Hi,
I don't know if this is a bug or it was intended for this thread.
0. Set in the LE CODED thermometer settings.

  1. Connect via nRF Connect to the thermometer with your firmware.
  2. In the nRF Connect app, switch the PHY mode to 1M.
  3. Disconnect the connection
  4. The nRF Connect application and Google Chrome will not search for your ATC thermometer

The way to fix it is to remove the battery from the thermometer.
I wonder if a malicious neighbor can spoil thermometers for less advanced users in this way.
@pvvx
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pvvx commented Mar 3, 2023 •
edited
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  1. Set in the LE CODED thermometer settings.
  2. Connect via nRF Connect to the thermometer with your firmware.
  3. In the nRF Connect app, switch the PHY mode to 1M.
  4. Disconnect the connection
  5. Connect via nRF Connect to the thermometer with your firmware - ok
  6. Disconnect the connection

You are not describing something.
Everything works in nRFConnect. Any switching to any PHY:

image

image

nRF Connect, 2023-03-04
ATC_0B5EED (A4:C1:38:0B:5E:ED)
V	01:57:30.042	Connecting to A4:C1:38:0B:5E:ED...
D	01:57:30.042	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, preferred PHY = LE 1M)
D	01:57:31.045	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	01:57:31.045	Connected to A4:C1:38:0B:5E:ED
V	01:57:31.057	Discovering services...
D	01:57:31.057	gatt.discoverServices()
D	01:57:31.096	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
I	01:57:31.322	Connection parameters updated (interval: 7.5ms, latency: 0, timeout: 5000ms)
D	01:57:32.427	[Callback] Services discovered with status: 0
I	01:57:32.427	Services discovered
V	01:57:32.444	Generic Access (0x1800)
- Device Name [N R] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R W] (0x2A04)
Generic Attribute (0x1801)
- Service Changed [I] (0x2A05)
   Client Characteristic Configuration (0x2902)
Device Information (0x180A)
- Model Number String [R] (0x2A24)
- Serial Number String [R] (0x2A25)
- Firmware Revision String [R] (0x2A26)
- Hardware Revision String [R] (0x2A27)
- Software Revision String [R] (0x2A28)
- Manufacturer Name String [R] (0x2A29)
Battery Service (0x180F)
- Battery Level [N R] (0x2A19)
   Client Characteristic Configuration (0x2902)
Environmental Sensing (0x181A)
- Temperature Celsius [N R] (0x2A1F)
   Client Characteristic Configuration (0x2902)
- Temperature [N R] (0x2A6E)
   Client Characteristic Configuration (0x2902)
- Humidity [N R] (0x2A6F)
   Client Characteristic Configuration (0x2902)
Unknown Service (00010203-0405-0607-0809-0a0b0c0d1912)
- Unknown Characteristic [R WNR] (00010203-0405-0607-0809-0a0b0c0d2b12)
   Characteristic User Description (0x2901)
Unknown Service (00001f10-0000-1000-8000-00805f9b34fb)
- Unknown Characteristic [N R WNR] (00001f1f-0000-1000-8000-00805f9b34fb)
   Client Characteristic Configuration (0x2902)
Unknown Service (0000fe95-0000-1000-8000-00805f9b34fb)
D	01:57:32.445	gatt.setCharacteristicNotification(00002a05-0000-1000-8000-00805f9b34fb, true)
D	01:57:32.451	gatt.setCharacteristicNotification(00002a19-0000-1000-8000-00805f9b34fb, true)
D	01:57:32.454	gatt.setCharacteristicNotification(00002a1f-0000-1000-8000-00805f9b34fb, true)
D	01:57:32.459	gatt.setCharacteristicNotification(00002a6e-0000-1000-8000-00805f9b34fb, true)
D	01:57:32.462	gatt.setCharacteristicNotification(00002a6f-0000-1000-8000-00805f9b34fb, true)
D	01:57:32.465	gatt.setCharacteristicNotification(00001f1f-0000-1000-8000-00805f9b34fb, true)
I	01:57:32.499	Connection parameters updated (interval: 20.0ms, latency: 49, timeout: 4000ms)
V	01:57:38.912	Reading PHY...
D	01:57:38.912	gatt.readPhy()
I	01:57:38.932	PHY read (TX: LE Coded, RX: LE Coded)
V	01:57:45.327	Requesting preferred PHYs...
D	01:57:45.327	gatt.setPreferredPhy(LE 1M, LE 1M, coding option = No preferred)
I	01:57:51.003	PHY updated (TX: LE 1M, RX: LE 1M)
V	01:57:54.599	Disconnecting...
D	01:57:54.599	gatt.disconnect()
D	01:57:54.621	[Callback] Connection state changed with status: 0 and new state: DISCONNECTED (0)
I	01:57:54.621	Disconnected
D	01:57:54.810	gatt.close()
D	01:57:54.814	wait(200)
V	01:57:55.016	Connecting to A4:C1:38:0B:5E:ED...
D	01:57:55.016	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, preferred PHY = LE 1M)
D	01:57:55.043	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	01:57:55.043	Connected to A4:C1:38:0B:5E:ED
D	01:57:55.051	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
V	01:57:55.087	Discovering services...
D	01:57:55.087	gatt.discoverServices()
D	01:57:57.745	[Callback] Services discovered with status: 0
I	01:57:57.745	Services discovered
V	01:57:57.758	Generic Access (0x1800)
- Device Name [N R] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R W] (0x2A04)
Generic Attribute (0x1801)
- Service Changed [I] (0x2A05)
   Client Characteristic Configuration (0x2902)
Device Information (0x180A)
- Model Number String [R] (0x2A24)
- Serial Number String [R] (0x2A25)
- Firmware Revision String [R] (0x2A26)
- Hardware Revision String [R] (0x2A27)
- Software Revision String [R] (0x2A28)
- Manufacturer Name String [R] (0x2A29)
Battery Service (0x180F)
- Battery Level [N R] (0x2A19)
   Client Characteristic Configuration (0x2902)
Environmental Sensing (0x181A)
- Temperature Celsius [N R] (0x2A1F)
   Client Characteristic Configuration (0x2902)
- Temperature [N R] (0x2A6E)
   Client Characteristic Configuration (0x2902)
- Humidity [N R] (0x2A6F)
   Client Characteristic Configuration (0x2902)
Unknown Service (00010203-0405-0607-0809-0a0b0c0d1912)
- Unknown Characteristic [R WNR] (00010203-0405-0607-0809-0a0b0c0d2b12)
   Characteristic User Description (0x2901)
Unknown Service (00001f10-0000-1000-8000-00805f9b34fb)
- Unknown Characteristic [N R WNR] (00001f1f-0000-1000-8000-00805f9b34fb)
   Client Characteristic Configuration (0x2902)
Unknown Service (0000fe95-0000-1000-8000-00805f9b34fb)
D	01:57:57.758	gatt.setCharacteristicNotification(00002a05-0000-1000-8000-00805f9b34fb, true)
D	01:57:57.772	gatt.setCharacteristicNotification(00002a19-0000-1000-8000-00805f9b34fb, true)
D	01:57:57.775	gatt.setCharacteristicNotification(00002a1f-0000-1000-8000-00805f9b34fb, true)
D	01:57:57.778	gatt.setCharacteristicNotification(00002a6e-0000-1000-8000-00805f9b34fb, true)
D	01:57:57.782	gatt.setCharacteristicNotification(00002a6f-0000-1000-8000-00805f9b34fb, true)
D	01:57:57.786	gatt.setCharacteristicNotification(00001f1f-0000-1000-8000-00805f9b34fb, true)
I	01:58:00.210	Connection parameters updated (interval: 7.5ms, latency: 0, timeout: 5000ms)
I	01:58:00.299	Connection parameters updated (interval: 20.0ms, latency: 49, timeout: 4000ms)
V	01:58:08.992	Disconnecting...
D	01:58:08.992	gatt.disconnect()
D	01:58:08.998	[Callback] Connection state changed with status: 0 and new state: DISCONNECTED (0)
I	01:58:08.998	Disconnected
D	01:58:10.700	[Broadcast] Action received: android.bluetooth.device.action.ACL_DISCONNECTED
D	01:58:13.988	gatt.close()
D	01:58:13.996	wait(200)
V	01:58:14.200	Connecting to A4:C1:38:0B:5E:ED...
D	01:58:14.200	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, preferred PHY = LE 1M)
D	01:58:15.438	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	01:58:15.438	Connected to A4:C1:38:0B:5E:ED
V	01:58:15.456	Discovering services...
D	01:58:15.456	gatt.discoverServices()
D	01:58:15.477	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
I	01:58:15.721	Connection parameters updated (interval: 7.5ms, latency: 0, timeout: 5000ms)
D	01:58:16.949	[Callback] Services discovered with status: 0
I	01:58:16.949	Services discovered
V	01:58:16.964	Generic Access (0x1800)
- Device Name [N R] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R W] (0x2A04)
Generic Attribute (0x1801)
- Service Changed [I] (0x2A05)
   Client Characteristic Configuration (0x2902)
Device Information (0x180A)
- Model Number String [R] (0x2A24)
- Serial Number String [R] (0x2A25)
- Firmware Revision String [R] (0x2A26)
- Hardware Revision String [R] (0x2A27)
- Software Revision String [R] (0x2A28)
- Manufacturer Name String [R] (0x2A29)
Battery Service (0x180F)
- Battery Level [N R] (0x2A19)
   Client Characteristic Configuration (0x2902)
Environmental Sensing (0x181A)
- Temperature Celsius [N R] (0x2A1F)
   Client Characteristic Configuration (0x2902)
- Temperature [N R] (0x2A6E)
   Client Characteristic Configuration (0x2902)
- Humidity [N R] (0x2A6F)
   Client Characteristic Configuration (0x2902)
Unknown Service (00010203-0405-0607-0809-0a0b0c0d1912)
- Unknown Characteristic [R WNR] (00010203-0405-0607-0809-0a0b0c0d2b12)
   Characteristic User Description (0x2901)
Unknown Service (00001f10-0000-1000-8000-00805f9b34fb)
- Unknown Characteristic [N R WNR] (00001f1f-0000-1000-8000-00805f9b34fb)
   Client Characteristic Configuration (0x2902)
Unknown Service (0000fe95-0000-1000-8000-00805f9b34fb)
D	01:58:16.964	gatt.setCharacteristicNotification(00002a05-0000-1000-8000-00805f9b34fb, true)
D	01:58:16.968	gatt.setCharacteristicNotification(00002a19-0000-1000-8000-00805f9b34fb, true)
D	01:58:16.971	gatt.setCharacteristicNotification(00002a1f-0000-1000-8000-00805f9b34fb, true)
D	01:58:16.975	gatt.setCharacteristicNotification(00002a6e-0000-1000-8000-00805f9b34fb, true)
D	01:58:16.978	gatt.setCharacteristicNotification(00002a6f-0000-1000-8000-00805f9b34fb, true)
D	01:58:16.981	gatt.setCharacteristicNotification(00001f1f-0000-1000-8000-00805f9b34fb, true)
I	01:58:17.041	Connection parameters updated (interval: 20.0ms, latency: 49, timeout: 4000ms)
V	01:58:22.187	Reading PHY...
D	01:58:22.188	gatt.readPhy()
I	01:58:22.201	PHY read (TX: LE Coded, RX: LE Coded)

I wonder if a malicious neighbor can spoil thermometers for less advanced users in this way. ?

A neighbor will never spoil anything if a pin code is set.

Chrome does not support Bluetooth 5.0 when scanning devices.
The thermometer mode in "LE Long Range" is made to work with Bluetooth 5.0 adapters to increase the receiving distance by 4 times or more (1 km in a straight line without obstacles).
Bluetooth 5.0 "LE long Range" works in Home Assists with Bluetooth 5.0 adapters.

  1. After the firmware in the thermometer, set the necessary parameters. Increase the BLE advertising interval to more than 3.5s to compensate for the increase in consumption in LE Long Range mode.
  2. Switch the thermometer to "LE Long Range".
  3. Work in Home Assistant and in programs that support Bluetooth 5.0 and higher.

@DienoX
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DienoX commented Mar 4, 2023

Hi,
I will try to repeat the process again. I've managed to do it twice already, but I think the problem may be due to my damaged hardware.

When I test it, I'll let you know what my results were.

@pvvx
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pvvx commented Mar 4, 2023 •
edited
Loading

Specify the sequence of actions.

For some software failures, there is a timeout. It is expressed in minutes.
During this timeout, the CPU is in sleep mode and does not transmit BLE advertising.
These are bugs in the Telink SDK functions (RTC timer overflow) and I have only partially corrected them.
But you probably have a different problem?

@pvvx pvvx closed this as completed Mar 14, 2023
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@DienoX @pvvx