DTH11 sensor with relay

[Artis]

Hi can someone know how to connect relay to DTH11 sensor temperature readings. I added my flowcode file, in it in decison "relay ieslegsanas" i want to input "str>28" but its give me error. i think is becauce i should change str to bite. But when i do that my sensor readings aren't fine.

[Benj]

Hello,

This should hopefully help. I use the strings to send data to the LCD and then read the temperature value again but this time as a whole number rather than a string. This way I can make the comparison directly on the value.

DHT11_Strada.fcfx

(11.52 KiB) Downloaded 267 times

You could add some hysteresis to stop the relay from oscillating on and off like this.

Hyst.jpg (33.06 KiB) Viewed 3165 times

[Artis]

Thanks it's help a lot.