SparkFun IoT Redboard ESP32

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1

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#define BLYNK_TEMPLATE_ID “TMPL6BudvxtrA”
#define BLYNK_TEMPLATE_NAME “Study of IAQ SPARKFUN”
#define BLYNK_AUTH_TOKEN “HmODGoojQZ9cBtnqUBypH_J8XaXkZmWx”

#define BLYNK_PRINT Serial
#include <SPI.h>
#include<WiFiNINA.h>
#include<BlynkSimpleWiFiNINA.h>

char ssid = “AdreMirah”;
char pass = “adreana2002”;

#include <Wire.h>
#include “SparkFunBME280.h”

BME280 mySensor;

void setup()
{
Serial.begin(115200);
Serial.println(“Reading basic values from BME280”);

Wire.begin(23, 22); //SDA, SCL for ESP32
//The ESP32 supports different pins for the I2C interface

if (mySensor.beginI2C() == false) //Begin communication over I2C
{
Serial.println(“The sensor did not respond. Please check wiring.”);
while(1); //Freeze
}
}

void loop()
{
Serial.print(“Temperature: “);
Serial.print(mySensor.readTempF(), 2);
Serial.println(” degrees F”);

Serial.print(“Pressure: “);
Serial.print(mySensor.readFloatPressure(), 2);
Serial.println(” Pa”);

Serial.print("Altitude: ");
Serial.print(mySensor.readFloatAltitudeMeters(), 2);
Serial.println(“m”);

Serial.print(“%RH: “);
Serial.print(mySensor.readFloatHumidity(), 2);
Serial.println(” %”);

Serial.println();
delay(1000);
} Can anyone help me check if the code for IOT sensor is correct as we need to connect to Blynk and do we need to installed any libraries ?

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2

i am trying to do something similar as well

3

Have you gotten the basic examples for each working first? Hook up just the screen and get its to begin outputting AVR-Based Serial Enabled LCDs Hookup Guide - SparkFun Learn

Then I’d move on to do the same for the IAQ sensor https://docs.sparkfun.com/SparkFun_Indoor_Air_Quality_Sensor-SCD41-SEN55/software_setup/

Then move on to getting both to work at once over serial, and finally integrate the whole shebang into your Blynk

4

We followed the instructions in your hookup guide and successfully got each component working individually. However, we’re having trouble integrating the system with Blynk. Additionally, we need the complete code for the entire setup—including the LCD, sensor, and IoT module—to ensure seamless connectivity with Blynk for real-time data monitoring

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5

There is no “complete code” for this combination of devices. It is your responsibility to write your own code that ties them all together. Sparkfun has written examples for each separate device that you can use as starting points.

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6

what does the error message mean? does that mean i have issue connecting the board to the port?

// ==== Blynk Configuration ====
#define BLYNK_TEMPLATE_ID "Type template ID
#define BLYNK_TEMPLATE_NAME “Type template name”
#define BLYNK_AUTH_TOKEN “Type Auth Token”

#include <BlynkSimpleEsp32.h> // Make sure this library is installed

char ssid = “Type wifi name”;
char pass = “type wifi password”;

// ==== I2C and Sensor Libraries ====
#include <Wire.h>
#include <SensirionCore.h>
#include <SensirionI2CSen5x.h>
#include “SparkFun_SCD4x_Arduino_Library.h”
#include <SerLCD.h>

// ==== Sensor and Display Instances ====
SensirionI2CSen5x sen5x;
SCD4x scd4x;
SerLCD lcd; // Default I2C address 0x72

// ==== Measurement Variables ====
float pm1p0, pm2p5, pm4p0, pm10p0;
float sen5xHumidity, ambientTemperature, vocIndex, noxIndex;

void setup() {
Serial.begin(115200);
delay(250);
Wire.begin();

// ==== Initialize Blynk ====
Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

// ==== Initialize LCD ====
lcd.begin(Wire);
lcd.setBacklight(255, 255, 255);
lcd.setContrast(5);
lcd.clear();
lcd.print(“Initializing…”);

// ==== Initialize SEN55 ====
sen5x.begin(Wire);
uint16_t error;
char errorMessage[256];

error = sen5x.deviceReset();
if (error) {
errorToString(error, errorMessage, 256);
Serial.println("SEN55 Reset error: " + String(errorMessage));
lcd.clear(); lcd.print(“SEN55 Reset Err”);
}

float tempOffset = 0.0;
error = sen5x.setTemperatureOffsetSimple(tempOffset);
if (error) {
errorToString(error, errorMessage, 256);
Serial.println("Temp Offset Error: " + String(errorMessage));
}

error = sen5x.startMeasurement();
if (error) {
errorToString(error, errorMessage, 256);
Serial.println("SEN55 startMeasurement error: " + String(errorMessage));
}

// ==== Initialize SCD41 ====
if (!scd4x.begin()) {
Serial.println(“SCD4x not detected. Check wiring!”);
lcd.clear(); lcd.print(“SCD4x Not Found”);
while (true); // Halt
}

lcd.clear();
lcd.print(“Sensors Ready”);
delay(2000);
lcd.clear();
}

void loop() {
Blynk.run();

uint16_t error;
char errorMessage[256];

error = sen5x.readMeasuredValues(
pm1p0, pm2p5, pm4p0, pm10p0,
sen5xHumidity, ambientTemperature, vocIndex, noxIndex
);

if (!error) {
Serial.print("PM2.5: “); Serial.print(pm2p5);
Serial.print(” ug/m3, Temp: “); Serial.print(ambientTemperature);
Serial.print(” C, Hum: "); Serial.println(sen5xHumidity);

// ==== LCD Display ====
lcd.setCursor(0, 0);
lcd.print("PM2.5:"); lcd.print(pm2p5, 1);
lcd.print(" T:"); lcd.print(ambientTemperature, 1);

lcd.setCursor(0, 1);
lcd.print("Sec:"); lcd.print(millis() / 1000);

// ==== Blynk Virtual Writes ====
Blynk.virtualWrite(V0, pm2p5);
Blynk.virtualWrite(V1, ambientTemperature);
Blynk.virtualWrite(V2, sen5xHumidity);
Blynk.virtualWrite(V3, vocIndex);
Blynk.virtualWrite(V4, noxIndex);
Blynk.virtualWrite(V5, pm10p0);

} else {
errorToString(error, errorMessage, 256);
Serial.println("SEN55 Read Error: " + String(errorMessage));
}

// ==== SCD41 CO2 Readings ====
if (scd4x.readMeasurement()) {
float co2 = scd4x.getCO2();
float scdTemp = scd4x.getTemperature();
float scdHum = scd4x.getHumidity();

Serial.print("CO2: "); Serial.print(co2); Serial.print(" ppm, ");
Serial.print("Temp: "); Serial.print(scdTemp); Serial.print(" C, ");
Serial.print("Hum: "); Serial.println(scdHum);

lcd.setCursor(0, 2);
lcd.print("CO2:"); lcd.print(co2);

// ==== Send to Blynk ====
Blynk.virtualWrite(V6, co2);
Blynk.virtualWrite(V7, scdTemp);
Blynk.virtualWrite(V8, scdHum);

}

delay(1000); // Read interval
}

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7

i got the same issue , how do I resolve these issues . Please I need help .

8

I tried to link the board and got this error message, what does that mean and how do i fix this issue?
I had followed the Hookup guide Blink.

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9

alright i managed to solved the problem by manually pressing the “boot” button on the IoT board

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