i’m making a project using esp32 as well as MLX90614 and MAX30102 sensors. The problem I’m having when putting the two sensors together doesn’t work. even though if you run the sensors one by one it goes well and can be displayed on blynk. but when put together the sensor does not work as usual and can not be displayed in blynk. the following is the program
thank you.
#define BLYNK_PRINT Serial
#define MAX_BRIGHTNESS 255
#define REPORTING_PERIOD_MS 1000
#include <BlynkSimpleEsp32.h>
#include <Adafruit_MLX90614.h>
#include <Wire.h>
#include <Blynk.h>
#include <WiFi.h>
#include "MAX30105.h"
#include "spo2_algorithm.h"
#include "heartRate.h"
MAX30105 particleSensor;
//SENSOR MLX90614 SUHU TUBUH DAN LINGKUNGAN
Adafruit_MLX90614 mlx = Adafruit_MLX90614();
float ambient_temp = 0.0;
float object_temp = 0.0;
BlynkTimer timer;
//SENSOR MAX30100 SATURASI UDARA
uint32_t irBuffer[100];
uint32_t redBuffer[100];
uint32_t tsLastReport = 0;
int32_t bufferLength;
int32_t spo2;
int32_t heartRate;
int8_t validSPO2;
int8_t validHeartRate;
byte pulseLED = 2; //onboard led on esp32 nodemcu
byte readLED = 19;
long lastBeat = 0;
float beatsPerMinute;
float ledBlinkFreq;
int beatAvg = 0, sp02Avg = 0;
//BAGIAN ATAS BERES BAGIAN VOID SETUP DAN VOID SENSOR MLX DAN MAX
char auth[] = "Or9lkhcUTOJqs4YYrGl-7mgL-PaoduAW";
char ssid[] = "ALI";
char pass[] = "ali101010";
void setup() {
//SET UP MLX90614
Serial.begin(9600);
Serial.println("Adafruit MLX90614 test");
Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
mlx.begin();
timer.setInterval(300L,sensor1);
//SET UP MAX30100 SATURASI OKSIGEN
ledcSetup(0, 0, 8); // PWM Channel = 0, Initial PWM Frequency = 0Hz, Resolution = 8 bits
ledcAttachPin(pulseLED, 0); //attach pulseLED pin to PWM Channel 0
ledcWrite(0, 255);
Serial.print("Initializing Pulse Oximeter..");
if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
{
Serial.println(F("MAX30105 was not found. Please check wiring/power."));
while (1);
}
byte ledBrightness = 50; //Options: 0=Off to 255=50mA
byte sampleAverage = 1; //Options: 1, 2, 4, 8, 16, 32
byte ledMode = 2; //Options: 1 = Red only, 2 = Red + IR, 3 = Red + IR + Green
byte sampleRate = 100; //Options: 50, 100, 200, 400, 800, 1000, 1600, 3200
int pulseWidth = 69; //Options: 69, 118, 215, 411
int adcRange = 4096; //Options: 2048, 4096, 8192, 16384
particleSensor.setup(ledBrightness, sampleAverage, ledMode, sampleRate, pulseWidth, adcRange);
}
//SETUP BERES LANJUT LOOP
void sensor1(){
ambient_temp = mlx.readAmbientTempC();
Serial.print("Ambient Temp = ");
Serial.println(ambient_temp);
Blynk.virtualWrite(V4,ambient_temp);
object_temp = mlx.readObjectTempC();
Serial.print("Object Temp = ");
Serial.println(object_temp);
Blynk.virtualWrite(V5,object_temp);
}
void sensor2(){
bufferLength = 100;
for (byte i = 0 ; i < bufferLength ; i++)
{
while (particleSensor.available() == false) //do we have new data?
particleSensor.check(); //Check the sensor for new data
redBuffer[i] = particleSensor.getIR();
irBuffer[i] = particleSensor.getRed();
particleSensor.nextSample(); //We're finished with this sample so move to next sample
Serial.print(F("red: "));
Serial.print(redBuffer[i], DEC);
Serial.print(F("\t ir: "));
Serial.println(irBuffer[i], DEC);
}
maxim_heart_rate_and_oxygen_saturation(irBuffer, bufferLength, redBuffer, &spo2, &validSPO2, &heartRate, &validHeartRate);
while (1)
{
for (byte i = 25; i < 100; i++)
{
redBuffer[i - 25] = redBuffer[i];
irBuffer[i - 25] = irBuffer[i];
}
for (byte i = 75; i < 100; i++)
{
while (particleSensor.available() == false) //do we have new data?
particleSensor.check(); //Check the sensor for new data
digitalWrite(readLED, !digitalRead(readLED)); //Blink onboard LED with every data read
redBuffer[i] = particleSensor.getRed();
irBuffer[i] = particleSensor.getIR();
particleSensor.nextSample();
long irValue = irBuffer[i];
if (checkForBeat(irValue) == true)
{
long delta = millis() - lastBeat;
lastBeat = millis();
beatAvg = (beatAvg+beatsPerMinute)/2;
if(beatAvg != 0)
ledBlinkFreq = (float)(60.0/beatAvg);
else
ledBlinkFreq = 0;
ledcWriteTone(0, ledBlinkFreq);
}
if (millis() - lastBeat > 10000)
{
beatsPerMinute = 0;
beatAvg = (beatAvg+beatsPerMinute)/2;
if(beatAvg != 0)
ledBlinkFreq = (float)(60.0/beatAvg);
else
ledBlinkFreq = 0;
ledcWriteTone(0, ledBlinkFreq);
}
}
Serial.print(beatAvg, DEC);
Serial.print(F("\t HRvalid="));
Serial.print(validHeartRate, DEC);
Serial.print(F("\t SPO2="));
Serial.print( sp02Avg , DEC);
Serial.print(F("\t SPO2Valid="));
Serial.println(validSPO2, DEC);
if (validSPO2 == 1 && spo2 < 100 && spo2 > 0)
{
sp02Avg = (sp02Avg+spo2)/2;
}
else
{
spo2 = 0;
sp02Avg = (sp02Avg+spo2)/2;;
}
if(millis() - tsLastReport > REPORTING_PERIOD_MS){
Blynk.virtualWrite(V7, beatAvg);
Blynk.virtualWrite(V8, sp02Avg);
tsLastReport = millis();
}
}
}
void loop() {
Blynk.run();
timer.run();
}
