I took everything apart, reconnected the (slightly longer, but also thicker and better insulated) cable I used for my initial experiments, and everything went back to working really well. I got lots of zeros, some seemingly random numbers, and definitely no consecutive packet numbers.

Dan Julio has updated the log for Lepton 3.5. The FLIR Lepton® is a radiometric-capable LWIR OEM camera solution that is smaller than a dime, fits inside a smartphone, and is one tenth the cost of traditional IR cameras. This kit comes with a custom dual camera mount to hold the thermal and daylight cameras side by side. Looking more closely at the received data, I also realized that the data I received had absolute no relation to what the FLIR module was supposed to be seeing. Computers like the Raspberry Pi are about the size of a credit card and have computing power on the order of full-sized PCs from a few decades ago. Raspberry Pi 3 FLIR Lepton Dev Kit Description This is a plug-and-play Raspberry Pi 3 kit that allows you to overlay thermal images over PiCam daylight images in real time. At this point I had rewritten most of the source code for talking to the Lepton, and realized that the red square was actually an indication of synchronization loss between the Pi and the Lepton (i.e., that the received packets did not represent consecutive lines in an image, but rather contained some other information). Surprisingly, things mostly stopped working. FLIR Lepton A radiometric-capable LWIR Micro Thermal Camera Module available in 80圆0 or 160x120 resolution Compare Specs FLIR Lepton Breakout Board V2. After finishing my initial experimentation, I 3D printed an enclosure for the Pi, a visual camera and the Lepton, and put it all together. Lepton Integration - Raspberry Pi Teledyne FLIR Lepton Integration with Raspberry Pi HARDWARE REQUIRED Select PureThermal 2 Board or FLIR Lepton Breakout Board for integration. When I first hooked up the Lepton module to a Raspberry Pi, everything seemed to work really well, and I was even wondering what the 'red square' problem was all about.

Raspberry pi lepton