B4R Question [Solved] Question about AT-09 BLE bluetooth

[Deleted member 103]

Hi,

I've been ordering my BLE modules from Aliexpess for a long time, and until a month ago I had no problems with them, everything works perfectly.
But for a month now, everything I order no longer works, although the Bluetooth modules look the same.
It is about 50 pieces of "AT-09 BLE Bluetooth 4.0" where the name and the baud can no longer be changed.

I've always used this script below to change the name and baud.
Maybe someone has already had the same experience here and has a solution, that would be great.

#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX

void setup() {
  // put your setup code here, to run once:
  mySerial.begin(9600);
  Serial.begin(9600);
 
  sendCommand("AT");
  sendCommand("AT+NAMEMyName");
  sendCommand("AT+BAUD8");
}

void sendCommand(const char * command){
  Serial.print("Command send :");
  Serial.println(command);
  mySerial.println(command);
  //wait some time
  delay(100);
 
  char reply[100];
  int i = 0;
  while (mySerial.available()) {
    reply[i] = mySerial.read();
    i += 1;
  }
  //end the string
  reply[i] = '\0';
  Serial.print(reply);
  Serial.println("Reply end");
}

void loop() {

}

 

[Deleted member 103]

In these 2 pictures you can see the difference between the good AT-09 and the bad. The bad ones have fewer AT commands than the good ones, so I am unable to establish a connection.

AT-09 bad:

AT-09 good:

 

[tigrot]

I had a similar issue with a HC05. The name was impossibile to write, reported null name. Seems than the flash memory was non working.

 

[Deleted member 103]

I had a similar issue with a HC05. The name was impossibile to write, reported null name. Seems than the flash memory was non working.

I have already bought at various sellers at Aliexpress and even at Amazon, in total I have more than 60 pieces, and nobody works.
I do not know who should be shopping anymore.

 

[XorAndOr]

I've always used this script below to change the name and baud.

Hi, you can do a test, to see if the problem is in the code or it is the module.
Open the arduino serial monitor, sending the commands and also setting the nl \ cr.
my 2 cents

 

[Deleted member 103]

Hi, you can do a test, to see if the problem is in the code or it is the module.
Open the arduino serial monitor, sending the commands and also setting the nl \ cr.
my 2 cents

Thanks for your answer, but the problem is described here:

[Solved] Question about AT-09 BLE bluetooth

Hi, I've been ordering my BLE modules from Aliexpess for a long time, and until a month ago I had no problems with them, everything works perfectly. But for a month now, everything I order no longer works, although the Bluetooth modules look the same. It is about 50 pieces of "AT-09 BLE...

www.b4x.com

There are different AT-09 versions.
With version 4.1 it works, but with version 5.3 it does not work.

 

[f0raster0]

Then you should buy the version 4.1, or it isn't available anymore?

Also, when buying from aliexpress, buy from an electronics shop or factory because they could answer your questions and help you. (Don't buy just from any shop)
Have you asked them about your situation?

Edit:
Your modules have the same hardware (chip)? can you post a picture.. maybe reprogramming them with the firmware that you need will solve the issues.

 

[Deleted member 103]

Then you should buy the version 4.1, or it isn't available anymore?

I have always bought it to the same seller, but for a month I always get the wrong one.
I suspect that version 4.1 is no longer built, or that a wrong series is in circulation.
Playing a new firmware on it is not that easy, you have to solder a few cables on the module.

Your modules have the same hardware (chip)?

It looks the same, but I look at it again exactly.

 

[Deleted member 103]

The modules look the same and the chip is also the same.

 

[Deleted member 103]

Ok, if I look at the modules exactly, then they do not look very the same.

 

[f0raster0]

The modules look the same and the chip is also the same.
View attachment 112361

I'm reading here

MLT-BT05 BLE module – a clone of a clone?? | Arik Yavilevich's blog

Previously I covered the HM-10 Bluetooth Low Energy (BLE) module and its clone, the CC41-A. Those are two popular modules that allow simple BLE communication through a serial interface and are handy with Arduinos and other hobby micro controllers. Make sure you read that article first as it...

blog.yavilevich.com

 

[Deleted member 103]

I'm reading here

MLT-BT05 BLE module – a clone of a clone?? | Arik Yavilevich's blog

Previously I covered the HM-10 Bluetooth Low Energy (BLE) module and its clone, the CC41-A. Those are two popular modules that allow simple BLE communication through a serial interface and are handy with Arduinos and other hobby micro controllers. Make sure you read that article first as it...

blog.yavilevich.com

Thank you very much, but I already know this website, unfortunately it didn't help either.

 

[f0raster0]

oh I see,
you could try reflash your module Bluetooth CC41 to HM10,it is just one idea, I have used just one of those module in my life
but you can try

Huamao Technology CO,. LTD.

 

[Deleted member 103]

Unfortunately, I already tried that, without success.

But I have now a German seller who sells to me with version 4.4.
All others with version 5.3 I can now throw away.

 

[Deleted member 103]

Problem solved!
The problem was in B4a in this line:

BleManager.Scan2(Array(FFE0), False)

if you change this line like this, the BLE module will be found.

BleManager.Scan2(Null, False)

Somehow these AT-09 modules work a little differently with firmware version 5.3 than with firmware version 4+.

 

[Erel]

Try it with:

BleManager.Scan2(Array(UUID("FFE0")), False)



'utility to convert short UUIDs to long format on Android
Private Sub UUID(id As String) As String 'ignore
#if B4A
    Return "0000" & id.ToLowerCase & "-0000-1000-8000-00805f9b34fb"
#else if B4I
    Return id.ToUpperCase
#End If
End Sub

 

[f0raster0]

Problem solved!
The problem was in B4a

Oh I see.
Next time use the "App nRF connect" to test the hardware. Very usefull.

 

[Deleted member 103]

Try it with:

BleManager.Scan2(Array(UUID("FFE0")), False)



'utility to convert short UUIDs to long format on Android
Private Sub UUID(id As String) As String 'ignore
#if B4A
    Return "0000" & id.ToLowerCase & "-0000-1000-8000-00805f9b34fb"
#else if B4I
    Return id.ToUpperCase
#End If
End Sub

Hi Erel,
In my example, "FFE0" is defined as a variable, so it shouldn't make a difference, should it?

    Private FFE0 As String = "0000ffe0-0000-1000-8000-00805f9b34fb"

 

[Erel]

Correct.

 

[Deleted member 103]

Oh I see.
Next time use the "App nRF connect" to test the hardware. Very usefull.

Thanks for the hint, I'll try it.