OneWire incorrect temperatures

[luxi]

My program read 8 DS18B20 temperature sensors with OneWireSpark.
Sometimes I get incorrect temperatures (red squares on image).

Here is my code
Why is this happening?

[nrobinson2000]

What If you try using spark-dallas-temperature?

https://github.com/tomdeboer/SparkCoreDallasTemperature/tree/master/firmware

This post might help:

Spark-dallas-temperature MANUAL mode

@magnum129 Just an observation, but the code for getting the temperature looks way too complex. What model of sensor are you using? You need to include the spark-dallas-temperature library in your code. To get the temperature in Celsius you can just do: ds.requestTemperatures(); float celsius = ds.getTempCByIndex(0); Also, you should probably change: OneWire ds = OneWire(D4); // 1-wire signal on pin D4 to DallasTemperature ds(new OneWire(D4)); getSoilTemp should look like this: void …

[ScruffR]

You may want to add a CRC check on the scratchpad data too before using the data.

[luxi]

That did the trick. Thanks.
I recommend to include this tip to Particle official OneWire library.
It would save me a day of figuring out.