USB 16 Linux

[Maik]

Hi,

i have some trouble to start my USB 16 on Linux and PHP.

First i plug in the servo power,
then I connect the USB 16 with PC:

dmesg anwser:

usb 1-4: new full speed USB device using ohci_hcd and address 9
usb 1-4: configuration #1 chosen from 1 choice
cp2101 1-4:1.0: cp2101 converter detected
usb 1-4: reset full speed USB device using ohci_hcd and address 9
usb 1-4: cp2101 converter now attached to ttyUSB0

In next step I try to send some Test-Data:

#!/usr/bin/php

<?php $f = fopen("/dev/ttyUSB0","w"); // open port fwrite($f,chr(255)); fwrite($f,chr(9)); // servo 10 fwrite($f,chr(1)); // position 1-254 fclose($f); // close port ?>

The “serial activity LED” is flashing, but
the Servo don’t do anything.

I operate the USB 16 in Mini SSC II Mode.

I you can help me.

Thanks.

[jan]

Hello,

Have you applied servo power? If so, what are you using?

- Jan

[Maik]

I use a battery pack (4x AA).

After sending Data to the USB 16 the red LED is constant on and the green is flashing.

[jan]

Red LED on with green flashing means that the controller thinks the serial rate is too fast. Your original post doesn’t show anything about how you’re setting the baud rate. What do you have it set to? Have you tried different speeds?

- Jan

[Maik]

Hi Jan,

thanks your fast answer. Yes i forgot the baud rate setting. I’ve never worked with PHP and Ports before. If you or somebody have one Testscript i would be pleased to get it.

Tomorrow i will test the PHP IO Functions:
php.net/manual/en/ref.dio.php

Regards
Maik