From 4c6444650da3a0aa1e2e9b00f42cc4e2af057fe6 Mon Sep 17 00:00:00 2001 From: Florian Pritz Date: Wed, 18 Jun 2014 11:48:46 +0200 Subject: initial commit Signed-off-by: Florian Pritz --- .../examples/DHTtester/DHTtester.pde | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 lib/DHT_sensor_library/examples/DHTtester/DHTtester.pde (limited to 'lib/DHT_sensor_library/examples/DHTtester/DHTtester.pde') diff --git a/lib/DHT_sensor_library/examples/DHTtester/DHTtester.pde b/lib/DHT_sensor_library/examples/DHTtester/DHTtester.pde new file mode 100644 index 0000000..8f40790 --- /dev/null +++ b/lib/DHT_sensor_library/examples/DHTtester/DHTtester.pde @@ -0,0 +1,44 @@ +// 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"); + } +} -- cgit v1.2.3-24-g4f1b