GrovePi PHP library

[MikeIWT]

Hi

I hope I’m not the only one looking for this, but I’m trying to write GrovePi scripts to work with Grove sensors in PHP. I have a PHP TCP server running on another computer, and I want to write a TCP client on the Raspberry Pi to send sensor data to the server. I’d prefer the client be written in PHP as well due to my own expertise level and for easy code maintenance. Any help/suggestion is greatly appreciated, thanks!

[cyclicalobsessive]

@MikeIWT

hope I’m not the only one looking for this

From what I can tell, you are not the first, but the first in some time.

I found this thread where someone was calling a Python script from PHP, but no “native PHP GrovePi interface”:

Permission error when calling python script from php via browser[SOLVED]

Are there any advice to make php-script run python-script with “exec” function without being a “root” user? I’m a user of Grove Pi+ on Raspberry Pi3 /w Raspbian OS. When I call a simple python-script that blinks LED once, from a PHP-script via browser, it gives me a permission error such as below. Traceback (most recent call last): File "grove_blink.py", line 6, in from grovepi import * File "/var/www/html/grovepi.py", line 64, in bus = smbus.SMBus(1) IOError: [Errno 13] …

And this one (for GoPiGo but same principle applies):

Using webpage with PHP to control the GoPiGo

Yes that is the problem, i added the following line to the sudo file using the command: sudo visudo for the php page uses the user www-data, i adding the line: www-data ALL=(ALL) NOPASSWD: ALL so now i can start the python scripts from the php script with: $command = ‘sudo python /home/pi/remote/control.py ‘. $x .’ ‘. $y .’ 2>&1’; $result = shell_exec($command); echo $result; redirecting the error output and echoing it to the web browser is very use full to find bugs, typo’s etc.

and this stackoverflow q/a:

How to execute python script from php?

I could possibly help you with the Python, although I don’t have a GrovePi, but did write a few lines of PHP long ago - actually long enough that I don’t remember PHP except that I had a lot of dollar signs, ampersands, and breaking lists up constantly, I think.