B4R Question Remote file access, download

Erel

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• Jun 7, 2016

• #2

I will prepare an example.

 

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P

positrom2

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• Jun 7, 2016

• #3

Erel said:

I will prepare an example.

Click to expand...

Timer is running....
Kind of contest...

 

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M

Mostez

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• Jun 7, 2016

• #4

OK Erel, I'm waiting

Thanks

 

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Erel

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• Jun 8, 2016

• #5

https://www.b4x.com/android/forum/threads/arduino-pc-file-transfer.67682/

 

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M

Mostez

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• Jun 8, 2016

• #6

Thanks Erel,
I ordered Arduino Mega board to run this code.

 

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rbghongade

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• Sep 12, 2016

• #7

Dear friends,
Is it possible to upload a file from PC/android device to sd card connected to arduino / wemos via Wi-Fi ?
If so please provide a demo.

 

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Erel

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• Sep 13, 2016

• #8

Start with this tutorial: https://www.b4x.com/android/forum/threads/arduino-pc-file-transfer.67682/

You only need to change the types of eth and ethServer and maybe the setup code.

 

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rbghongade

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• Sep 13, 2016

• #9

Dear Erel,
Tried to use WeMos as server in AP mode. B4J code connects correctly, sends command , B4R receives command and lists the files on log, but at the B4J end it always lands in AStream_Error sub and hence logs "connection closed".
I have attached my files for your perusal.
Since there is no issue of SPI lines ,I have modified the code accordingly.

 

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• WEMOS_B4R_FILE_TRANSFER.zip

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• B4J_FILE_TRANSFER.zip

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Erel

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• Sep 13, 2016

• #10

In the FileTransfer example the connection is closed after each request.

Try to change the delay at the end of AStream_NewData event:

B4X:

  Delay(1000)
  socket.Close

Is NewData event raised on the B4J side?

 

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rbghongade

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• Sep 13, 2016

• #11

Dear Erel,
Changed the delay but no result.
NewData event is not raised on B4J side.

 

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Erel

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• Sep 14, 2016

• #12

I see. The correct code is:

B4X:

socket.Stream.Flush
Delay(100)
socket.Close

In ESP8266 the network output is buffered and the call to Socket.Close closes the connection before the data is sent.

 

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rbghongade

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• Sep 14, 2016

• #13

Dear Erel ,
That worked great! Now how can I do the reverse file transfer. File on PC to be uploaded to SD card!

 

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Erel

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• Sep 14, 2016

• #14

This feature is not implemented in this example. You will need to implement it yourself...

 

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rbghongade

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• Sep 15, 2016

• #15

I managed to create a file on SD card , instead of transferring the file with MQTT since the file is very small 150 bytes only!
Thanks Erel!

 

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