Qwiik plug arduino r4 doesnt find any sensor

Projects Networking, Protocols, and Devices
1

hi.
I have a Adafuit HTU31 sensor and I try to plug the sensor in my Arduino UNO r4 wifi qwiik plug. the sensor receive power and the light turn on but no matter what I try to change in the code the sensor is not found by the UNO.

Thanks

That is the latest code i try.

#include <Wire.h>
#include "Adafruit_HTU31D.h"

Adafruit_HTU31D htu = Adafruit_HTU31D();

void setup() {
  Serial.begin(115200);
  // No need to wait for Serial in a deployed project
  Serial.println("HTU31D Temperature Reader");

  Wire.begin(); // Initialize I2C - UNO R4 WiFi Qwiic uses default SDA/SCL pins
  if (!htu.begin(0x40)) {
    Serial.println("Couldn't find HTU31D sensor!");
    while (1) delay(10);
  }
  Serial.println("HTU31D found!");
}

void loop() {
  sensors_event_t humidity, temp;
  
  htu.getEvent(&humidity, &temp);
  
  Serial.print("Temperature: ");
  Serial.print(temp.temperature);
  Serial.println(" °C");
  
  delay(2000); // Read every 2 seconds
}
2

The Qwiic connector on the R4 WiFi uses Wire1, not Wire.

2 Likes
3

thank it worked I was missing the sensor adress and the wire1

this is the code I use

#include <Wire.h>
#include "Adafruit_HTU31D.h"

Adafruit_HTU31D htu = Adafruit_HTU31D();

void setup() {
  Serial.begin(115200);
  // No need to wait for Serial in a deployed project
  Serial.println("HTU31D Temperature Reader");
  

  Wire1.begin();
if (!htu.begin(0x40, &Wire1)) {
    Serial.println("Couldn't find HTU31D sensor!");
    while (1) delay(10);
  }
  Serial.println("HTU31D found!");
}

void loop() {
  sensors_event_t humidity, temp;
  
  htu.getEvent(&humidity, &temp);
  
  Serial.print("Temperature: ");
  Serial.print(temp.temperature);
  Serial.println(" °C");
  
  delay(2000); // Read every 2 seconds
}
1 Like