The Grove (SCD30) is a high-precision CO2 sensor module manufactured by Seeed Studio (Part ID: 841454122166). It is designed to measure carbon dioxide (CO2) concentration, temperature, and humidity with exceptional accuracy. The sensor leverages non-dispersive infrared (NDIR) technology for CO2 detection, ensuring reliable and stable performance over time. Its compact design and compatibility with the Grove system make it an excellent choice for environmental monitoring, HVAC systems, air quality analysis, and IoT applications.
This circuit features an ESP32-S3 microcontroller interfaced with an SD card module, two OLED displays, a GPS module, and a CAN bus module. The ESP32-S3 records GPS data to the SD card, displays speed on one OLED, and shows wind speed from the CAN bus on the other OLED, providing a comprehensive data logging and display system.
Open Project in Cirkit Designer
This circuit features an Arduino Nano microcontroller interfaced with an Adafruit SGP30 air quality sensor, an Adafruit SHTC3 temperature and humidity sensor, and a 0.96" OLED display for real-time environmental monitoring. The sensors communicate with the Arduino via I2C, with the SGP30 and SHTC3 sensors providing air quality readings (CO2 and TVOC) and temperature/humidity data, respectively, which are then displayed on the OLED. Additionally, a buzzer is connected to the Arduino and is programmed to activate when CO2 levels exceed a certain threshold, serving as an alert system.
Open Project in Cirkit Designer
This circuit features an ESP32-S3 microcontroller interfaced with an SD card, two OLED displays, a GPS module, and a CAN bus module. It records GPS data to the SD card every second, displays speed in knots on one OLED display, and shows wind speed from the CAN bus in NMEA 2000 format on the other OLED display.
Open Project in Cirkit Designer
This circuit integrates two RTC DS3231 real-time clock modules with a Glyph C3 microcontroller. The RTC modules are connected to the microcontroller via I2C communication protocol, using the SCL and SDA lines for clock and data respectively. Both RTC modules and the microcontroller share a common power supply (3V3) and ground (GND), indicating that they operate at the same voltage level.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| CO2 Measurement Range | 400 ppm to 10,000 ppm |
| CO2 Accuracy | ±(30 ppm + 3% of reading) |
| Temperature Measurement | -40°C to 70°C |
| Temperature Accuracy | ±(0.8°C) |
| Humidity Measurement | 0% RH to 100% RH |
| Humidity Accuracy | ±(3% RH) |
| Communication Interface | I2C and UART |
| Operating Voltage | 3.3V to 5V |
| Power Consumption | 19 mA (average) |
| Dimensions | 40 mm x 20 mm |
The Grove (SCD30) module uses a standard Grove connector for easy integration. Below is the pin configuration:
| Pin Name | Description |
|---|---|
| VCC | Power supply (3.3V to 5V) |
| GND | Ground |
| SDA | I2C data line |
| SCL | I2C clock line |
Hardware Setup:
Software Setup:
Sketch > Include Library > Manage Libraries.Sample Code: Below is an example Arduino sketch to read CO2, temperature, and humidity data from the Grove (SCD30):
#include "Seeed_SCD30.h" // Include the SCD30 library
void setup() {
Serial.begin(9600); // Initialize serial communication at 9600 baud
while (!Serial); // Wait for the serial monitor to open
if (!scd30.initialize()) {
Serial.println("SCD30 initialization failed! Check connections.");
while (1); // Halt execution if initialization fails
}
Serial.println("SCD30 initialized successfully.");
}
void loop() {
if (scd30.isAvailable()) {
float co2 = scd30.getCO2(); // Read CO2 concentration
float temperature = scd30.getTemperature(); // Read temperature
float humidity = scd30.getHumidity(); // Read humidity
// Print the sensor readings to the serial monitor
Serial.print("CO2: ");
Serial.print(co2);
Serial.print(" ppm, Temperature: ");
Serial.print(temperature);
Serial.print(" °C, Humidity: ");
Serial.print(humidity);
Serial.println(" %");
} else {
Serial.println("SCD30 data not available. Waiting...");
}
delay(2000); // Wait 2 seconds before the next reading
}
0x61. Ensure no other devices on the I2C bus share this address.| Issue | Possible Cause | Solution |
|---|---|---|
| No data output from the sensor | Incorrect wiring or loose connections | Verify all connections and wiring. |
| SCD30 initialization failed | I2C address conflict or library issue | Check I2C address and reinstall library. |
| Inaccurate CO2, temperature, or humidity readings | Insufficient warm-up time or environmental interference | Allow the sensor to stabilize for a few minutes. Ensure proper placement. |
| Arduino sketch upload error | Incorrect board or port selected | Select the correct board and port in the Arduino IDE. |
Can I use the Grove (SCD30) with a Raspberry Pi?
What is the typical lifespan of the SCD30 sensor?
How do I calibrate the SCD30 sensor?
Can the SCD30 measure CO2 levels below 400 ppm?
This documentation provides a comprehensive guide to using the Grove (SCD30) sensor. For further assistance, refer to the official Seeed Studio documentation or community forums.