So, Is the FLIR Lepton Breakout Board v1.4 by GetLab we used for the Lepton 2 and 2.5 affecting the Lepton 3.5?ģ. In making the new generation of probes, we have recycled the breakout boards from the old probes. In the past, we have used older model Leptons 2 or 2.5 for our wildfire probes.We are still not sure how the c code is getting the image out of the Lepton, so there is quite possibly something caping the radiometric output at 45437.Although extremely unlikely that such a well-calibrated device would be off, we independently verified with both a laser thermometer and another thermal camera that the black body was at the temperature specified.Inaccurate Temperature readings from the Black Body. All it is seven wires to connect the two boards in a space-efficient manor.We are more than capable of calibrating the Leptons ourselves however, it is a step we would like to avoid if possible. We have found that switching off radiometric mode can increase the maximum temperature before the 14-bit full count of 16,383 is reached, although this is nowhere near 400✬. However, this seems to only change the maximum radiometric value from 45437(454.37º K) to 4543(454.3º K). This is another technique recommended online, changing the T linear scale from 0.01 to 0.1. However, we have found that there is no change in maximum readout value when changing the gain mode from high(default) to low. You tell it to close the shutter, it closes the shutter, you suggest it disable radiometric mode, it disables it. The lepton control code that is part of the package works great. The code we are using is this package written for part of a bachelor’s thesis at the Brno University of Technology in the Czech Republic (see link 3). Of course, this would be the first method and the one most recommended to boost the maximum temperature value. We hope that someone in this group knows some little detail or a trick We have tried multiple techniques(see below) and gone over the documentation many times, all to no avail. ![]() This was discovered when testing the Lepton with a black body thermal target (addendum 1) with a maximum temperature of 400º C. No matter how we change the gain, it is always the same maximum value. The problem we are having is that the maximum radiometric value is always 45437 or 454.37º K = 181.22º C = 358.196º F. However, we have had much trouble in getting to that 400✬ output. We got the Lepton 3.5 specifically for its 400º C radiometric output in low gain mode. The code we are using to get the images onto the pi is a straightforward c program I found online(see link 2). We are also using a custom printed circuit board to connect the GPIO on the pi to the SPI pins of the breakout board. Our setup is a pi zero with the FLIR Lepton Breakout Board v1.4 by GetLab (see link 1). Hi, My name is Max, and I am a college student in Rochester, NY working with the Lepton 3.5 for deployments in wildfire research. Uses standard cell phone-compatible power supplies: 2.8 V to sensor, 1.2 V to digital core, and flexible IO from 2.8 V to 3.Do you know why our Lepton 3.5 in the radiometric mode set at low gain can only register temperatures up to 454.37º C (45437-pixel count) even though the manufacture clearly says a maximum of 400º C low gain mode?.Radiometry software features for temp measurement including per pixel and frame radiometric output (Tlinear) and spotmeter. ![]() Radiometric accuracy (35☌ blackbody) greater of:.Integrated digital thermal image processing functions, including automatic thermal environment compensation, noise filters, non-uniformity correction, and gain control.Increased scene dynamic range up to +400☌.56° HFOV, 71° diagonal (f/1.1 silicon doublet).11.5 mm x 12.7 mm x 6.9 mm (without socket). ![]() For developers, its reference firmware, viewer software, and hardware schematic are all open source. The PureThermal 2 Smart I/O Module with Thermal by FLIR® is a hackable thermal USB webcam, pre-configured to operate as a plug-and-play UVC 1.0 USB thermal webcam that will work with standard webcam and video apps on all major platforms. FLIR® Lepton infrared camera module with purethermal 2 breakout board.
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