I use the mlx90614 temperature sensor with a Spark core. I use a simpel code making use of the pkourany/Adafruit-MLX90614-Library. The temperatures are stored in two variables which I read out via a web service ( tinamous.com ). After quite some time (first attempt 3 hours, second attempt about 26 h) …

Can you try taking two readings at once and throw out the first reading? I had to do this for another I2C sensor that I am using. First reading had about a 50% chance of being correct but the 2nd reading was always correct (so far anyways).

I forgot to mention that I’m reading out the spark variable every minute from the core. Suddenly the reading jumps to the high value and stays there until I repower the core. What do you mean by reading out to values “at once”? Anyhow the reading should work always.

Hi @superholz Maybe you should post your code so we can have a look. What @wgbartley was suggesting is that your sensor does not always return good data the first time and reading it twice might make it work better. There are some issues on the ST32F205 processor used in Photon with i2c. The manu…

Hi @bko here the code, it is the example sketch from the library adding a statement to expose a spark variable. I'm using the older core by the way with the newest firmware, I think. Do you know if the workaround you mentioned lead to a solution for other projects? The add variable is the I2C addre…

Am having the same problem @superholz , I bought three photons now and there are all not working as required. They started behaving weird after i upload the similar code as yours using the same sensor Adafruit MLX90614. Am just depressed destroying three consecutive photons. I think it is because of…

CHECK THE POWER !!! I meet with this problem and spend a lot of time. This sensor VERY dependence from power. When I use this sensor with Arduino powered by USB and Arduino has any another devices connected - sensor drop to 1037 state. But when I connect Arduino to external power via power connect…

I2C mlx90614 temperature readout suddenly changes to 1037.55 °C

Troubleshooting

dfreymann September 10, 2015, 1:56am 3

I have an I2C sensor connected to a Spark Core that ‘suddenly’ stopped working a few days ago. I haven’t figured it out yet.

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I2C mlx90614 temperature readout suddenly changes to 1037.55 °C

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