Android Question Barcode scanner serial uart.

[vdudukov]

Hi everyone.

I have a POS device with hardware barcode scanner on the top of device (WF360 model).

Well, in device I have an application which makes me choose Keyboard emulation or Data Input: Serial Port (/dev/scanner)

I tried everything to make a serial connection, with SerialPort and Usb serial port, but nothing happens.

I downloaded Google Serial Port Api app from Google Play, and it works fine.

So i dont know what i am doing wrong ?

 

[Picena Informatica]

try to scan an Ean13 barcode.

 

[vdudukov]

try to scan an Ean13 barcode.

No matter is it EAN13 or any other format. I cannot connect it with B4A tool.

 

[Picena Informatica]

I have the wide fly 360 without scanner so i cannot try it. Set as keyboard and try to use with keypress event in activity.

 

[vdudukov]

With keyboard emulation working. But i want to use direct serial port.

 

[Picena Informatica]

serialport is a file. search forum for an example. If i remember well there is a sample with stream and serial port.

 

[Picena Informatica]

Use links on top of this thread.

 

[vdudukov]

Hahaha Yeah!

I tried Log(File.ReadString("/dev/ttyMT2",""))

It works!

Thanks!

 

[Picena Informatica]

Good news for future application with widefly

 

[vdudukov]

Now just to find solution how to make AsynStreamsText with File.ReadString("/dev/ttyMT2",""), or to synchronize scan button with File.ReadString("/dev/ttyMT2","").

 

[vdudukov]

I tried another method:

Sub button_Click
d.SetPort("/dev/ttyMT2",9600,0x2)
x.Initialize(d.InputStream,d.OutputStream,"astreams")
End Sub

Sub astreams_NewData (Buffer() As Byte)
Dim msg As String
msg = BytesToString(Buffer, 0, Buffer.Length, "UTF8")
edittext2.Text = msg
edittext2.Text = edittext2.text.Replace("�","")
edittext2.Text = edittext2.text.Replace(",","")
End Sub

now, when I press software button, i receive text like this: ��, 123456789
I tried to put timer to tick every second to receive data from barcode scanner, but it is not good. Sometimes I receive ��,��,123456789
��,123456789
123456789
is it possible to use AsyncStreamText class to receive data synchronized ?

like this example: ��, 123456789
��, 123456789
��, 123456789

 

[Picena Informatica]

Sub astreams_NewData (Buffer() As Byte)
Dim i as int
for i=0 to buffer.lenght-1
    log(buffer(i))
next
End Sub

To see which caracters are �

 

[vdudukov]

Sub astreams_NewData (Buffer() As Byte)
Dim i as int
for i=0 to buffer.lenght-1
    log(buffer(i))
next
End Sub

To see which caracters are �

Well that is when i press triger button, when nothing scanned.

Numbers are: 4,-48,0,0,-1,44

 

[Picena Informatica]

And when scanning a Barcode?

 

[vdudukov]

44
51
56
53
52
48
49
48
51
59
57

And hardware keys on left and right side cannot be identificated by Activity_KeyPress.

So I use software button

Sub button1_Click
broadcastreceiver.sendbroadcast("com.hampoo.barcodescanner")
End Sub

Then i can scan.

 

[Picena Informatica]

Seems that the Barcode starts with 44 (comma) then you must ignore anything before character 44.

 

[vdudukov]

Well now I understand most everything.

Well my port UART ttyMT2, is file ttyMT2 in folder dev.

It is not real serial connection.

 

[EvgenyB4A]

I tried another method:

Sub button_Click
d.SetPort("/dev/ttyMT2",9600,0x2)
x.Initialize(d.InputStream,d.OutputStream,"astreams")
End Sub

Sub astreams_NewData (Buffer() As Byte)
Dim msg As String
msg = BytesToString(Buffer, 0, Buffer.Length, "UTF8")
edittext2.Text = msg
edittext2.Text = edittext2.text.Replace("�","")
edittext2.Text = edittext2.text.Replace(",","")
End Sub

now, when I press software button, i receive text like this: ��, 123456789
I tried to put timer to tick every second to receive data from barcode scanner, but it is not good. Sometimes I receive ��,��,123456789
��,123456789
123456789
is it possible to use AsyncStreamText class to receive data synchronized ?

like this example: ��, 123456789
��, 123456789
��, 123456789

Hi
Did you try close the app and then open it again? I tried and after opening again the app stacks on d.Setport..

 

[vdudukov]

Is there option with somekind of terminal ?

Its not so good with Timer.

with this application works fine and synchronized.

https://play.google.com/store/apps/details?id=android_serialport_api.sample

But i cannot do it with B4A.