Database not receive the data when one sensor stops

General
35

I use this thread. I testing another way for my problem but i still in the same, the way i´m used is this:

image.png
959d27465eb92de2c680919ac9bdee5d1a349dee.png1260×241 26.4 KB

My function is programmed like this:

if (typeof msg.payload === 'number') {
    msg.payload = true;
} else {
    msg.payload= false;
}
return msg;

When I run the program this gives me the following values ​​of msg.payload:

14/02/2019, 09:45:01[node: test function](http://10.6.4.101:1880/#)ns=2;s=SensorIndutivo : msg.payload : boolean
true

14/02/2019, 09:45:01[node: value received](http://10.6.4.101:1880/#)ns=2;s=SensorIndutivo : msg.payload : number
32.82964323001333

in the dasboard the led when it is true is green but when the sensor stops sending data it does not turn red (value false). The msg.payload of value received when sensor stops not send any value and not turn to red.