Sending NAN to Gauge result in ---- on an Android device. On the iPhone it shows 0

Sending NAN to Gauge result in ---- on an Android device. On the iPhone it shows 0.
In the following screenshots the Humidity sensor is not present and that is why I want to show —

Whats_App_Image_2018_08_13_at_9_15_36_PM  Screenshot_20180813_211536_Blynk

provide your code please

So this is correct, right?

Well, “0” is a number, so perhaps this should be fixed… Android representation is more clear. For me…

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float is2blynk = NAN;
Blynk.virtualWrite(V0, String(is2blynk));

@ldb as a quick workaround use

Blynk.virtualWrite(V0, "", "");