https://www.appropedia.org/How_to_install_FLIR_Lepton_Thermal_Camera_and_applications_on_Raspberry_Pi
flir lepton dev board breakout v1.3
Maybe the two floating pins need connecting?
https://www.pureengineering.com/projects/lepton
https://www.youtube.com/watch?v=-bqY-NclJtM&feature=emb_logo
https://lepton.flir.com/forums/topic/pylepton-overlay-guide-2-0-for-raspbian-pixel/
https://learn.sparkfun.com/tutorials/flir-lepton-hookup-guide/all
(brilliant page!!!)
Troubleshooting Tip: You may get an error like the one shown below: a
red square in a blank window. If this is the case, carefully remove
the Lepton module from the breakout board. That's right, pull it from
the socket, while it's powered. Then (again, very carefully) pop it
back into place. Images should start pouring in!
Huh!!! It worked!!
pi@rpi4-attic-solar:~/pylepton $ ./pylepton_capture image1.png
pi@rpi4-attic-solar:~/pylepton $ feh image1.png
pi@rpi4-attic-solar:~/pylepton $ date
Sat 08 May 2021 05:37:35 AM IST
pi@rpi4-attic-solar:~/pylepton $ # works!!!
pi@rpi4-attic-solar:~/pylepton $