Grove - Temperature & Humidity
Version från den 4 februari 2021 kl. 07.30 av Christian (diskussion | bidrag)
Fungerar inte i minusgrader.
Innehåll
Kompatibilitet
- Arduino
- Raspberry Pi
Port
Digital
Bibliotek
För Arduino IDE: https://github.com/Seeed-Studio/Grove_Temperature_And_Humidity_Sensor
Exempelkod
Arduino
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "DHT.h"
#define DHTPIN 2 // what pin we're connected to
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
DHT dht(DHTPIN, DHTTYPE);
void setup()
{
Serial.begin(9600);
Serial.println("DHTxx test!");
dht.begin();
}
void loop()
{
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
float t = dht.readTemperature();
// check if returns are valid, if they are NaN (not a number) then something went wrong!
if (isnan(t) || isnan(h))
{
Serial.println("Failed to read from DHT");
}
else
{
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C");
}
}
Raspberry Pi
import grovepi
import math
# Connect the Grove Temperature & Humidity Sensor Pro to digital port D4
# This example uses the blue colored sensor.
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))
except IOError:
print ("Error")
Mer information
http://wiki.seeedstudio.com/Grove-TemperatureAndHumidity_Sensor/