I Have a FLIR Lepton hooked up to a raspberry pi 5. I have been able to confirm the Lepton works, and run it by following the instructions from the GroupGets Github repo.

import cv2
cv2.namedWindow("preview")
cameraID = 0
vc = cv2.VideoCapture(cameraID)

if vc.isOpened(): # try to get the first frame
rval, frame = vc.read()
else:
rval = False

while rval:
cv2.imshow("preview", frame)
rval, frame = vc.read()
key = cv2.waitKey(20)
if key == 27: # exit on ESC
break

That is the code I have, taken from this flir tutorial:
https://www.flir.com/developer/lepton-integration/Project-People-finding-with-a-Lepton/

When I try to Run this code, I get the error that it can’t open the camera from the index, I ran a script to check for all camera indexes, and there were none that showed up. But the FLIR Lepton is connected and can be run. SO how can I run OpenCV with the FLIR lepton then?