Hi there,
I have the Grove DHT20, I’m following the tutorial on connecting it to the seeeduino v4.2 (https://wiki.seeedstudio.com/Grove-Temperature-Humidity-Sensor-DH20/). I’ve followed it exactly, but when I use the serial monitor I see something like this
where it keeps printing out garbage. Sometimes it will print out normally, but will quickly go back to just printing out garbage. Here is the code I’m using
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "Wire.h"
#include "DHT.h"
#define DHTTYPE DHT20 // DHT 20
/*Notice: The DHT10 and DHT20 is different from other DHT* sensor ,it uses i2c interface rather than one wire*/
/*So it doesn't require a pin.*/
DHT dht(DHTTYPE); // DHT10 DHT20 don't need to define Pin
#if defined(ARDUINO_ARCH_AVR)
#define debug Serial
#elif defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_SAM)
#define debug SerialUSB
#else
#define debug Serial
#endif
void setup() {
debug.begin(115200);
debug.println("DHTxx test!");
Wire.begin();
/*if using WIO link,must pull up the power pin.*/
// pinMode(PIN_GROVE_POWER, OUTPUT);
// digitalWrite(PIN_GROVE_POWER, 1);
dht.begin();
}
void loop() {
float temp_hum_val[2] = {0};
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
if (!dht.readTempAndHumidity(temp_hum_val)) {
debug.print("Humidity: ");
debug.print(temp_hum_val[0]);
debug.print(" %\t");
debug.print("Temperature: ");
debug.print(temp_hum_val[1]);
debug.println(" *C");
} else {
debug.println("Failed to get temprature and humidity value.");
}
delay(1500);
}thank you!
