Android Question how to Convert HEX to normal character ?

[hears]

i use this library :
https://www.b4x.com/android/forum/threads/felusbserial-alternative-usb-serial-library.62216/


recieved code from my USB serial device，it is connected to a HUAWEI WIFI router.

the code is in HEX ,i get by under event:

Private Sub serial_DataAvailable (Buffer() As Byte)
    Log("New data: " & bc.HEXFromBytes(Buffer))
 
 
 
End Sub

in window system i use Super Terminal recieve it,all is normal character. I make APP in Android system now .how to Convert these HEX code ?

 

[tigrot]

Do you mean you have a string like "303132" and you want the chars for each couple, in this case "012"?
Mauro

 

[hears]

Do you mean you have a string like "303132" and you want the chars for each couple, in this case "012"?
Mauro

yes ,303132 in normal string is 012

 

[tigrot]

Let me take lunch and I'll be back to you! Wife is calling!

 

[hears]

thank you , i get many code like this :"6720706f6f6c20697320696e69746900"

serial device code alway in HEX format.

 

[DonManfred]

Check ByteConverter Library

https://www.b4x.com/android/help/byteconverter.html#byteconverter_hextobytes
https://www.b4x.com/android/help/byteconverter.html#byteconverter_stringfrombytes

 

[tigrot]

I don't think you have to deal with hex format. This is only a way to show unprintable chars. You get bytes and you have to deal with them. You do a conversion which transforms bytes to hex. Display each byte and the work is done!
you string is "g pool is initi"

 

[hears]

Check ByteConverter Library

https://www.b4x.com/android/help/byteconverter.html#byteconverter_hextobytes
https://www.b4x.com/android/help/byteconverter.html#byteconverter_stringfrombytes

i have directly use 'stringfrombytes()' didn't change data format to HEX.
the result is wrongbyteconverter_stringfrombytes..i think the format from WIFI ROUTER send is HEX format.so must first get HEX COED.after change again to normal character

 

[DonManfred]

Check the documentation of byteconverter library!
You are doing it wrong!

Check StringToBytes and BytesToHex

 

[hears]

I don't think you have to deal with hex format. This is only a way to show unprintable chars. You get bytes and you have to deal with them. You do a conversion which transforms bytes to hex. Display each byte and the work is done!

i have directly use 'stringfrombytes()' didn't change data format to HEX.
the result is wrongbyteconverter_stringfrombytes..i think the format from WIFI ROUTER send is HEX format.so must first get HEX COED.after change again to normal character

 

[DonManfred]

i have directly use 'stringfrombytes()' didn't change data format to HEX.
the result is wrongbyteconverter_stringfrombytes..i think the format from WIFI ROUTER send is HEX format.so must first get HEX COED.after change again to normal character

OMG
It is not fun to help you! REALLY NOT.

READ the Documentation.

And try to understand what is happening with the different Methods!

the format from WIFI ROUTER send is HEX format

So you FIRST need to convert the HEX to Bytes. https://www.b4x.com/android/help/byteconverter.html#byteconverter_hextobytes
And then the Bytes to a String. https://www.b4x.com/android/help/byteconverter.html#byteconverter_stringfrombytes

 

[tigrot]

It seems a status report.

 

[tigrot]

In you code you use HEXFROMBYTES(that's why you get HEX), convert byte to string directly!

 

[tigrot]

A modem NEVER send HEX litteral.

 

[hears]

ok,now it is work now . StringFromBytes() must add "utf8"

Dim hexs As String
        hexs="6720706f6f6c20697320696e69746900"
  
        Log(bc.StringFromBytes(bc.HexToBytes(hexs),"utf8"))

tomorrow i will try WIFI router ...I think directly use "StringFromBytes() " maybe work too.