Android-ble | Android蓝牙4.0操作demo

I'm developing an adaptation for an android app, to communicate with a remote control, which has some pre defined commands. I've followed this implementation to do the Bluetooth communication and it's working fine for sometime. This app should communicate with the remote control every 5 minutes or less, and I've been using the app for almost 6 months now. The last week I've some command clashes problem and looking at the logs I couldn't identify why did that happened. The last time that this had happened the app was running for more than 24h, communicating with the remote control, without any communication issue. Two of it's commands have some similar characters, the first one that have to be done, to establish the connection.

OK_CONN

And an sniffer command which keeps the pilot awake listening for some sensor data:

N

Looking at the logs I can see the answer for command N, after applying the command OK_CONN. Is it possible for a Bluetooth command to lost part of it's data, during an established communication or am I doing something wrong when writing to a characteristic? Should I change the command names to avoid this kind of clash?

I'm using android 9, at a Sony XPeria XZ phone.

Edit to clarify @Emil comment

I am trying to make a BLE scanner using Android studio (JAVA). I am using a model code from here:https://github.com/joelwass/Android-BLE-Scan-Example

I have edited the code to filter for one single device I am currently using as the broadcaster ( the CC2640R2 Dev board).

I want to be able to print the Hex data stream that I would receive from the broadcast, so that i can use it to define different types of the development board as well as other informative packets.

From my research i have looked into the getBytes() function but am still yet to find a way it works.

MainActivity.java

I want to change my android device's Bluetooth UUID to a predefined value so that my BLE beacon can recognize it without pairing with it.

From this question I gathered that I'll have to change the service UUID but I can't find the relevant documents or tutorials.

How can I achieve this change of UUID via my app?

I am implementing a service that uses the autoconnect feature of bluetoothGatt to connect to the device and monitor it while it is being connected.

I work on the assumption that the device is already bonded (a coworker is responsible for that part) so autoconnect should not have any problems

my code is as follows:

I have been working through several BLE tutorials to develop an app to connect to an ESP32, but I cannot get the code to connect to the ESP32. I am using a Samsung phone which requires a time delay, but I have tried other phones and still cannot connect the ESP32 to the mobile app.

If I run a BLE scanner app I can connect to the ESP32, so I believe the ESP32 side is okay. If we scan for devices we can see it in the bluetooth device list.

The code is setup to detect and connect, I have tried a UUID and device name filer, but it will not connect. The ScanCallback is been triggered and we get the function onBatchScanResults been called, so we can see a list of devices but it will not connect to the ESP32. I think it should connect automatically with the gatt functions.

I cannot workout why it will not auto connect to the ESP32, as it's seen the devices and the scan connect is been trigged. Any help would be highly appreciated to fix this issue, as I have ran out of idea to fix it.