B4A Library UsbSerial library 2.0 - supports more devices

drponciano

Member
Licensed User
Well, well, well. I have worked with the 1 sec. delay (8000 byte packets) with my devices for a while. Not that I like it but... it works with Nexus Phones and tablets, Motorola, LG, Alcatel phones, HP tablets, Acer, and so on with same results. A few weeks ago I got a Samsung S7 phone. With that phone the serial transmission is SLOW, SLOW, SLOW using the same program and parameters. Any idea what is goimg on with this USB Libraries?
 

rtek1000

Active Member
Licensed User
Well, I do not have much to add, recently I asked Samsung's support how to make the SD card work as an internal storage and they did not respond to me, they just changed the wizard until the connection ended and no one knew how to do it .

S7 have some related problems on the internet, such as slow battery charging, USB file transfer and other.

Have you tried using a USB stick to check if the USB host works well?
 

drponciano

Member
Licensed User
Yes, the OTG addapter is working OK. Using the FTDI UART Terminal y see my data coming fast but not so with my program.
 

rtek1000

Active Member
Licensed User
UsbSerial Ver 2.4
What's new: Support for multiple USB devices
Version history Updated. You can find the changes by searching "Ver_2.4"
Maybe I over documented it. It was for me... feel free to remove the Nonsense
Library and Example updated to Ver 2.4
hoho driver also updated to support multiple devices
Hi,

Demo not work:
UsbSerialDemo.b4a and b4a v7 returns error (see image please)
usb array.jpg

B4X:
If usb1.UsbPresent(1) = usb1.USB_NONE Then    ' Ver_2.4
Error description: Array expected.
Occurred on line: 40
If usb1.UsbPresent(1) = usb1.USB_NONE Then' Ver_2.4
Word: (
 

Emiliano Cejas

Member
Licensed User
Hi! demo is not working. I use b4a version 3.82.

It opens the app, then i click on "Start 1" and ask for permision, click ok (grant permission)... then nothing happens.

If i click again on "Start 1", then it displays info about the adapter (FT230). but then nothing happens, it doesnt receive anything (the device over serial is sending info). And it doesnt enable the "stop 1" and "send 1" buttons.

Do i have to do other steps with my b4a version?

thanks!
 

rtek1000

Active Member
Licensed User
Hi! demo is not working. I use b4a version 3.82.

It opens the app, then i click on "Start 1" and ask for permision, click ok (grant permission)... then nothing happens.

If i click again on "Start 1", then it displays info about the adapter (FT230). but then nothing happens, it doesnt receive anything (the device over serial is sending info). And it doesnt enable the "stop 1" and "send 1" buttons.

Do i have to do other steps with my b4a version?

thanks!
Can not you use the latest version?
 

Emiliano Cejas

Member
Licensed User
update! tested demo with another USB-SERIAL cable that uses the FT232 instead of FT230 and it works. Could you add support for FT230 chip?

thanks
 

Erel

Administrator
Staff member
Licensed User
Both this native library and felUsbSerial native library do not support FT230.
 
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