Need help for MLX90614 5V IR temperature sensor

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bradcy
 
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Need help for MLX90614 5V IR temperature sensor

Post by bradcy »

Hi There,

I have been trying to get this IR temperature sensor working with standard code offered by Adafruit but no luck. :(
It keeps sending out an incorrect "fixed temperature" reading as shown below and not response any object in front the sensor.
I don't know what go wrong and hope someone can help me out here. Thanks,

I am using Arduino UNO board with exact setting same as Adafruit's Tutorial.
No tweaking or changing.

Here is the result/

Adafruit MLX90614 test
Ambient = 1037.55*C Object = 1037.55*C
Ambient = 1899.59*F Object = 1899.59*F

Ambient = 1037.55*C Object = 1037.55*C
Ambient = 1899.59*F Object = 1899.59*F

Ambient = 1037.55*C Object = 1037.55*C
Ambient = 1899.59*F Object = 1899.59*F

Ambient = 1037.55*C Object = 1037.55*C
Ambient = 1899.59*F Object = 1899.59*F

Ambient = 1037.55*C Object = 1037.55*C
........

Brad
Attachments
temperature_wiring.jpg
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adafruit_support_mike
 
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Re: Need help for MLX90614 5V IR temperature sensor

Post by adafruit_support_mike »

Post a photo of your hardware and we'll see if that tells us anything. The photo you posted is from the tutorial, and we know that one works.

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bradcy
 
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Re: Need help for MLX90614 5V IR temperature sensor

Post by bradcy »

Thank you for the reply.
Here is the picture.
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IR_TEM_SENSOR.jpg
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adafruit_support_mike
 
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Re: Need help for MLX90614 5V IR temperature sensor

Post by adafruit_support_mike »

The wiring looks good.

Double check the voltages at the sensor's pins to make sure the power is really getting where it needs to go, and try a different set of jumper wires for the I2C connections.

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bradcy
 
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Re: Need help for MLX90614 5V IR temperature sensor

Post by bradcy »

Hello Mike,

You are my savior, it is indeed a faulty "jumper wires" that connected to I2C.
My apology, I should have double checked on that before making this post.
Anyway, thank you for such big help.

Brad

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adafruit_support_mike
 
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Re: Need help for MLX90614 5V IR temperature sensor

Post by adafruit_support_mike »

Glad to hear you got things working.

Don't worry about being caught by the bad jumper. It takes a certain amount of expeience debugging hardware to develop the paranoid distrust of absolutely everything necessary to avoid surprises like that. ;-)

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