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DHT11 goes nuts :)
Posted: Sunday 28 July 2019 18:47
by TankySpanky
Hello all ,
I have a RPi and connected a DHT11 sensor, in the beginning all looks fine but after a day and you check the "lines" its goes all up and down
- DHT11 Te
mp / Hum - 2019-07-28 18_22_14-Dashticz Temp-Vocht.png (128.87 KiB) Viewed 2685 times
Im a bit of a noob still and i dont see where it can go wrong....
its the "only" sensor i got hooked up to the pi,
Powersupply is official for the Pi 3b+
It worked oke for a a while
Re: DHT11 goes nuts :)
Posted: Thursday 01 August 2019 1:21
by TankySpanky
No one ?
Re: DHT11 goes nuts :)
Posted: Thursday 01 August 2019 16:49
by freijn
Apperantly zero values are transmitted or..... connection is lost and values are not received ?
First Question, how long is the cable between sensor and RPI ? Did you apply the resistor as well at the end of the cable ?
Re: DHT11 goes nuts :)
Posted: Saturday 03 August 2019 9:27
by TankySpanky
Hello,
The cable are about 15cm from breadboard, and the DHT11 is mounted on a small print and no extra restistor is needed ( according the informaton of the item )
- DHT11-Temperature-Humidity-Module-1000x750.jpg (76.27 KiB) Viewed 2612 times
Its not "really" this item but it looks like this, with a red led.
Sometimes it works great for hours and otherwise it behaves like the first picture.
- 2019-08-03 09_24_51-temp hum.png (50.9 KiB) Viewed 2612 times
Maybe i just need to buy a DHT22, they seems to be a lot better
ty in advance
Re: DHT11 goes nuts :)
Posted: Saturday 03 August 2019 9:31
by Toulon7559
Looks like somewhere an 'intermittent'' contact:
checking of the cabling may be the solution.
If you want real improvement relative to DHT11, take BME280 as sensor:
provides temperature, humidity and pressure of much better quality.
Re: DHT11 goes nuts :)
Posted: Saturday 03 August 2019 22:02
by TankySpanky
Hello,
Oke thanx for the answer i go and look for that
greetings
Aad