"SPI read operation failed." Error

[sevelee]

Dear damip, I have download and run your code on my Raspberry 3. But it keeps logging "Connected" and "SPI read operation failed. Reconnecting." Do you have any idea what happens?

[damip]

Hello, it means that the software wasn't able to read from SPI. Here are some possible reasons that come to mind:

• Is your SPI port enabled on raspberry ? Here is a tutorial http://www.raspberrypi-spy.co.uk/2014/08/enabling-the-spi-interface-on-the-raspberry-pi/
• Does the software have read access rights to SPI ? Try launching it as root to check
• Check the connections, check if the lepton properly powered (right voltage, polarity etc...), check if your SPI cables are not too long or too capacitive
• Maybe there is a software problem as well: is there anything using the rpi CPU heavily and that could mess up the timings ? Is there any other software trying to access SPI ?

Check if your lepton works with the demo software: https://learn.sparkfun.com/tutorials/flir-lepton-hookup-guide

[sevelee]

Hi, As I also download this code and it can works with the lepton camera. So I think the connection is OK. Also I run the code as sudo.