ex6 two sensors over I2C working

Author: lewispg228

examples/Example_06_TwoSensors/Example_06_TwoSensors.ino

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+/*
+  Using the BMV080 Particulate Matter PM2.5 Sensor
+
+  This example shows how to use two BMV080 sensors on the same I2C bus.
+  
+  One sensor must have its AB0 Jumper changed to "0".
+  
+  The sensors will be in "continuous mode" to get
+  particulate matter readings once every second.
+
+  It uses polling of the devices to check if new data is available.
+
+  By: Pete Lewis
+  SparkFun Electronics
+  Date: September, 2024
+  SparkFun code, firmware, and software is released under the MIT License.
+    Please see LICENSE.md for further details.
+
+  Hardware Connections:
+  IoT RedBoard --> BMV080
+  QWIIC --> QWIIC
+
+  BMV080 "mode" jumper set to I2C (default)
+
+  Serial.print it out at 115200 baud to serial monitor.
+
+  Open a plotter to see the PM2.5 values from both sensors.
+
+  Feel like supporting our work? Buy a board from SparkFun!
+  https://www.sparkfun.com/products/26554
+*/
+
+#include "SparkFun_BMV080_Arduino_Library.h" // CTRL+Click here to get the library: http://librarymanager/All#SparkFun_BMV080
+#include <Wire.h>
+
+SparkFunBMV080I2C bmv080;           // Create an instance of the BMV080 class
+#define BMV080_ADDR 0x57 // SparkFun BMV080 Breakout defaults to 0x57
+
+SparkFunBMV080I2C bmv080_2;           // Create an instance of the BMV080 class
+#define BMV080_ADDR2 0x56 // AB0 Jumper set to 0
+
+bool newDataAvailable = false; // Flag to indicate new data is available
+bool newDataAvailable2 = false; // Flag to indicate new data is available
+
+float pm25 = 0.0; // Variable to store PM2.5 value
+float pm25_2 = 0.0; // Variable to store PM2.5 value
+
+bool isObstructed = false; // Flag to indicate sensor is obstructed
+bool isObstructed2 = false; // Flag to indicate sensor is obstructed
+
+void setup()
+{
+    Serial.begin(115200);
+
+    while (!Serial)
+        delay(10); // Wait for Serial to become available.
+    // Necessary for boards with native USB (like the SAMD51 Thing+).
+    // For a final version of a project that does not need serial debug (or a USB cable plugged in),
+    // Comment out this while loop, or it will prevent the remaining code from running.
+
+    Serial.println();
+    Serial.println("BMV080 Example 1 - Basic Readings");
+
+    Wire.begin();
+
+    if (bmv080.begin(BMV080_ADDR, Wire) == false)
+    {
+        Serial.println(
+            "BMV080 not detected at default I2C address. Check your jumpers and the hookup guide. Freezing...");
+        while (1)
+            ;
+    }
+    Serial.println("BMV080 at 0x57 found!");
+
+    if (bmv080_2.begin(BMV080_ADDR2, Wire) == false)
+    {
+        Serial.println(
+            "BMV080 not detected at 0x56 I2C address. Check your jumpers and the hookup guide. Freezing...");
+        while (1)
+            ;
+    }
+    Serial.println("BMV080 at 0x56 found!");    
+
+    // Wire.setClock(400000); //Increase I2C data rate to 400kHz
+
+    /* Initialize the Sensor (read driver, open, reset, id etc.)*/
+    bmv080.init();
+
+    /* Set the sensor mode to continuous mode */
+    if (bmv080.setMode(SFE_BMV080_MODE_CONTINUOUS) == true)
+    {
+        Serial.println("BMV080 set to continuous mode");
+    }
+    else
+    {
+        Serial.println("Error setting BMV080 mode");
+    }
+
+    delay(500);
+
+    bmv080_2.init();
+
+    if (bmv080_2.setMode(SFE_BMV080_MODE_CONTINUOUS) == true)
+    {
+        Serial.println("BMV080_2 set to continuous mode");
+    }
+    else
+    {
+        Serial.println("Error setting BMV080_2 mode");
+    }
+}
+
+void loop()
+{
+    if (bmv080.dataAvailable())
+    {
+        pm25 = bmv080.getPM25();
+        isObstructed = bmv080.getIsObstructed();
+        newDataAvailable = true;
+        //Serial.println("Sensor 1 data available");
+    }
+    delay(200); // needs a ~200ms delay in between talking to each sensor
+
+    if (bmv080_2.dataAvailable())
+    {
+        pm25_2 = bmv080_2.getPM25();
+        isObstructed2 = bmv080_2.getIsObstructed();
+        newDataAvailable2 = true;
+        //Serial.println("Sensor 2 data available");
+    }
+
+    delay(200); // needs a ~200ms delay in between talking to each sensor
+
+    if (newDataAvailable & newDataAvailable2)
+    {
+        //Serial.print("Sensor 1: ");
+
+        Serial.print(pm25);
+
+        if (isObstructed == true)
+        {
+            Serial.print(-1);
+        }
+
+        //Serial.print("\tSensor 2: ");
+
+        Serial.print(",");
+
+        Serial.print(pm25_2);
+
+        if (isObstructed2 == true)
+        {
+            Serial.print("-1");
+        }
+
+        Serial.println();
+
+        // reset variables
+        newDataAvailable = false;
+        newDataAvailable2 = false;
+        isObstructed = false;
+        isObstructed2 = false;
+    }
+}