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I have an Arduino Nano RP2040 Connect with two temperature sensors. A DHT22 is connected to D2 and pulled up with a 5 kΩ resistor to 5V, and a LSM6DSOX IMU is built in to the board. Here's my code:

#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Arduino_LSM6DSOX.h>

#define DHTPIN 2 #define DHTTYPE DHT22

DHT_Unified dht(DHTPIN, DHTTYPE);

void setup() { Serial.begin(9600); dht.begin(); IMU.begin(); }

void loop() { delay(1000);

sensors_event_t event; dht.temperature().getEvent(&event); Serial.print(F("DHT22: ")); Serial.print(event.temperature); Serial.print(F("°C and "));

float temperature_float = 0; IMU.readTemperatureFloat(temperature_float); Serial.print("LSM6DSOX: "); Serial.print(temperature_float); Serial.println(" °C"); }

When I run it, I get this in the serial monitor:

DHT22: 24.50°C and LSM6DSOX: 28.94°C

Why is there such a large difference (4.5°C/8.1°F) between the sensors?

0 Answers0