Temp/ Humidity sensor Grove Pi NOT working -1C -1% Humidity

squirrelheat1 · September 30, 2018, 3:14am

Blockquote

I’m kind of new at Grove pi and I have a problem. I have a temperature and humidity sensor and I followed the instructions and it left me with -1C and -1% Humidity. I installed the newest version of NOOBS and everything but it still didn’t work. Please anyone I need help ASAP.

RobertLucian · October 1, 2018, 8:37pm

Hi @squirrelheat1,

Can you first tell us the version of the GrovePi firmware you currently have? And also the code you are trying to run.

Thank you!

squirrelheat1 · October 6, 2018, 8:47pm

I am running version 1.2.7 of GrovePi
And I’m using the code that was downloaded called advanced temp and humidity

RobertLucian · October 8, 2018, 8:14pm

Hi @squirrelheat1,

Okay, having the 1.2.7 version on it should be fine. Just to make it very clear, you are running this script:

github.com

DexterInd/GrovePi/blob/master/Software/Python/grove_dht_pro.py#L37-L58


import grovepi
import math
# Connect the Grove Temperature & Humidity Sensor Pro to digital port D4
# This example uses the blue colored sensor.
# SIG,NC,VCC,GND
sensor = 4  # The Sensor goes on digital port 4.


# temp_humidity_sensor_type
# Grove Base Kit comes with the blue sensor.
blue = 0    # The Blue colored sensor.
white = 1   # The White colored sensor.


while True:
try:
    # This example uses the blue colored sensor. 
    # The first parameter is the port, the second parameter is the type of sensor.
    [temp,humidity] = grovepi.dht(sensor,blue)  
    if math.isnan(temp) == False and math.isnan(humidity) == False:
        print("temp = %.02f C humidity =%.02f%%"%(temp, humidity))

This file has been truncated. show original

Now, depending on what DHT sensor you’ve got, you have to change the type of the module on line 53. A mismatch between what you select in the script and what you actually have can manifest in the way you described.

Let us know if this fixed your problem.

Thank you!

squirrelheat1 · January 2, 2020, 5:40pm

I ran the above script and still no luck