Anyone know PHP?

by Simmons (Login simmons_josh)
R

 
I'm trying to read some serial data from an Arduino device on a usb serial port, /dev/ttyUSB0 to be exact.

The problem is, when the arduino senses loss of serial communication, it resets. A good feature in some situations. To overcome this I am using cat to redirect all serial communication to a FIFO.

cat /dev/ttyUSB0 > serialBuffer

I made it run in the background with nohup.

Now, how can I get PHP to read the data from that fifo? I've tried opening it like a file, but PHP doesn't seem to like that. I have no problem writing to the usb port. The problem is, I need to send a request for data to the arduino. Then read the data back from the serial port. I need PHP to wait for a full line, then continue on. Is there a simple way to get PHP to open a fifo and load up a string until a newline character is read?

Posted on Mar 26, 2018, 12:09 AM

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