BrickPi + RaspberryPi3 + ThermalSensor!


#1

Hey guys,
i buyed that pretty one from Dexter:
https://www.dexterindustries.com/manual/thermal-infrared-sensor/

Is there a posibility to read that sensor with the java package? – otherway would it be possible read it with a phyten Script -> but how to connect to the BrickPi Board, is there any thing that i have to figured out first?

Also could someone Explain to me which GPIO Pins are free, so i would connect the Thermal Sensor direct to the GPIO Pins and write a little Phyton Script to read values from it. Is that possible?

sorry for bad english, hope you understand my problem – if i find a a solution i swear i will write a little guide for everyone who want the same thing to do :wink:


#2

Please go here to determine which version of BrickPi you have. The answers to your questions depend on the hardware version you’re using.

For BrickPi3 you can start with the BrickPi3 DI-dTIR.py example.

For BrickPi/BrickPi+ you can start with the BrickPi+ DI-dTIR_Test.py example.


#3

Hi, i run that example. But it is strange. If i reconnect the Sensor it outputs some correct informatioen, but after several times it just send every time the same value. What is to change or what goes wrong … just running the orginal example on the BrickPi 2 … Here is the output:

Ambient Temp: 1037.54
Ambient Temp: 1037.54
Object Temp: 1037.54 Ambient Temp: 1037.54
Object Temp: 1037.54 Ambient Temp: 1037.54
Ambient Temp: 1037.54 #### here i am reconnect to the brick
Ambient Temp: 24.48
Object Temp: 25.8 Ambient Temp: 24.52
Object Temp: 23.04 Ambient Temp: 24.52
Object Temp: 23.28 Ambient Temp: 24.54
Object Temp: 23.14 Ambient Temp: 24.52
Object Temp: 1037.54 Ambient Temp: 24.54
Object Temp: 23.22 Ambient Temp: 24.54
Object Temp: 23.38 Ambient Temp: 24.54
Object Temp: 23.32 Ambient Temp: 24.54
Object Temp: 23.08 Ambient Temp: 24.56
Object Temp: 23.46 Ambient Temp: 24.56
Object Temp: 23.4 Ambient Temp: 24.56
Object Temp: 23.08 Ambient Temp: 24.54
Object Temp: 24.56 Ambient Temp: 24.56
Object Temp: 23.46 Ambient Temp: 24.56
Object Temp: 23.26 Ambient Temp: 24.54
Object Temp: 23.38 Ambient Temp: 1027.3
Ambient Temp: 24.56
Object Temp: 1027.3 Ambient Temp: 1037.54
Object Temp: 1037.54 Object Temp: 1037.54 Ambient Temp: 1037.54
Object Temp: 1037.54 Object Temp: 1027.3 Ambient Temp: 1037.54
Object Temp: 1037.54 Ambient Temp: 1037.54
Ambient Temp: 1037.54
Ambient Temp: 1037.54 #### this valkue never change - also it takes a little bit until the next line is written, very much longer than if the sensor works correct

Any helps what i have to do to let it work right?


#4

Are you restarting the program after you disconnect the sensor?


#5

Hi,
i connect everything together. start the py script -> nothing happens until i reconnect the the sensor, after that the script prints out several times the temperature. After a few times (see post before) it stops working. If i disonnect and reconnect the sensor again, the script works again several times agains. The script itself never restart again … i just connect/disconnect the wire… i’m confused


#6

Hey guys,

thanks for your support. Great! I found a solution.

It was just a memory failure. I tested it first with a 8GB SD Card and get the trouble i descripe above… than i just tested it with a 16GB SD Card and everythings works fine out of the box. On the Raspy also runs mjpeg streamer and a big java Application so the free space of the 8GB Card was just 50MB … with the 16GB Card everything is fine … I just wanna let you know that my probelm is solved and what the problem was … maybe some expert can explain me, why it don’t work with 50MB free space, maybe also just an Raspy Problem and no BrickPi Problem, i don’t know.


#7