Edit: we've made a Python script that seems to work quite well. Still working on it though. See attachment.

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I'm succesfully running a relay from my Raspberry Pi, turning on my CHDK hacked Canon Ixus 240 HS. I have also installed CHDKPTP and it works great communicating to the camera.

Now I want to make a python script that will run a timelapse, checking if the camera is still alive every picture and if not, turn on the camera. Here's an example of the script:

Check if the camera is on by trying to connect to it

return_code = call(["chdkptp", "-c"])
print(return_code)

Then an if statement to figure out what to do

if return_code == "ERROR: no matching devices found":
	#Turn on camera
	#CHDKPTP Connect to cam, rec mode, rs
	#Turb off camera
	
else:
	#CHDKPTP Connect to cam, rec mode, rs

The problem is that the Python script doesn't see the CHDKPTP response that it would usually show in the command line.

I'm aware that this is perhaps more of a Python question, but perhaps there are people here who've run into the same problem so I don't have to reinvent the wheel.

Is there a good way to script this? How can I make the Python script receive the CHDKPTP communication? Or should I approach this problem differently?

pilapse_0.1.5.py

6.69KB