Adafruit_SGP30 repository Moderators: adafruit_support_bill, adafruit

[delsan]

Hi everyone,

I just got a couple of Sensirion SGP30 gas sensors and connected to an Arduino Uno running on the 1.8.3 IDE version.

I downloaded the sgp30 test example codes from GitHub but it keeps coming back with "sensor not found"

I connected SDA to pin A4 and SCL to pin A5 and external 1.8 V DC power.

Appreciate your assistance

[ZipSnipe]

Looks like your below voltage from SGP30 website " supply voltage range of 2.4 to 5.5 V"

[Elnuma]

Hi Delsan,

Your supply voltage is correct with 1.8V, please refer to the datasheet:
https://www.sensirion.com/file/datasheet_sgp30

However the levels on the I2C bus need to be adjusted as well. Max. rating is VDD + 0.5V which means you'll require level shifters to make it work.

[delsan]

Thanks, Elnuma.

Do you have any specific level shifter to use?

[Elnuma]

A specific one isn't required.
If you'd like to receive a circuit suggestion, you can fill out the contact form on Sensirions website:
http://www.sensirion.com/contact

[delsan]

Hi everyone,

Happy new year.

In continuation of extracting data from the SGP30 using an Arduino Uno, I purchased a couple of Logic Level converter from digikey:

https://www.digikey.ie/products/en?keyw ... 0converter

Despite connecting the SGP30 SDA and SCL pins through the level converter, on running the Adafruit_SGP30 sample code, I am still getting "Sensor not found"

The Adafruit_SGP30 sample code is below:

Code: Select all | TOGGLE FULL SIZE

#include <Wire.h>
#include "Adafruit_SGP30.h"

#define SGP30_ADDR 0x58

Adafruit_SGP30 sgp;

void setup() {
  Serial.begin(115200);
  Serial.println("SGP30 test");
  Wire.begin();

  if (! sgp.begin()){
    Serial.println("Sensor not found :(");
    while (1);
  }
  Serial.print("Found SGP30 serial #");
  Serial.print(sgp.serialnumber[0], HEX);
  Serial.print(sgp.serialnumber[1], HEX);
  Serial.println(sgp.serialnumber[2], HEX);
}


void loop() {
  sgp.IAQmeasure();
  Serial.print("TVOC "); Serial.print(sgp.TVOC); Serial.print("\t");
  Serial.print("eCO2 "); Serial.println(sgp.eCO2);
  delay(1000);
}

Appreciate your assistance.