HELP WITH DHT11 (humidity/temperature sensor)

[espruino-discuss]

Posted at 2020-04-15 by cogo33

I'm using a temperature / humidity sensor (DHT11) like this:

var dht = require ("DHT11"). connect (C11);
dht.read (function (a) {console.log ("Temp is" + a.temp.toString () + "and RH is" + a.rh.toString ());});

However, I wanted a resolution of at least two decimal places. But I only get the whole number ... How should I proceed?

[espruino-discuss]

Posted at 2020-04-15 by @MaBecker

add toFixed(2)

a.temp.toFixed(2).toString()
a.rh.toFixed(2).toString()

[espruino-discuss]

Posted at 2020-04-17 by cogo33

@MaBecker thanks for the support.

But, i want to know if the sensor has more resolution. With toFixed(2) appears .00 and i need por precision to study my data. The question is: DHT11 has this resolution? There are some code that i have to add? Thanks

[espruino-discuss]

Posted at 2020-04-17 by @MaBecker

Not sure what you expect from a cheap sensor like

DHT11t +-2 degrees accuracy

DHT22 +-0.5 degrees accuracy

and than it’s getting expensive like

TMP117 +- 0.1 degrees accuracy

[espruino-discuss]

Posted at 2020-04-17 by cogo33

Thank you! I'll provide a DHT22