2 I2C and 1 UART are not working simultaneously in ESP32

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marvelmcufanpage45
Posts: 1
Joined: Mon Oct 25, 2021 1:40 pm

2 I2C and 1 UART are not working simultaneously in ESP32

Postby marvelmcufanpage45 » Mon Oct 25, 2021 1:48 pm

I have a project in which I have to monitor Acceleration of the subject, Location and Pulse + SpO2 of the subject. So, I've written this program to check data from MAX30100 Pulse Oxi sensor and MPU6050 Accelero and Gyroscope sensor using ESP32 -

This program works completely fine. No issues at all.

Code: Select all

#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define BLYNK_PRINT Serial
#include <Blynk.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "*********************";   

// For Pulse sensor
PulseOximeter pox;
float BPM, SpO2;
uint32_t tsLastReport = 0;

// For Accelerometer sensor
const int MPU_addr=0x68;
int16_t accelX, accelY, accelZ, gyroX, gyroY, gyroZ;
float gForceX, gForceY, gForceZ,rotX, rotY, rotZ;

void onBeatDetected()
{
    Serial.println("Beat Detected!");
}

void setup() {
  Serial.begin(115200);

  WiFi.begin("TP-Link", "**********");

  // Wait for wifi to be connected
  uint32_t notConnectedCounter = 0;
  while (WiFi.status() != WL_CONNECTED) {
      delay(100);
      Serial.println("Wifi connecting...");
      notConnectedCounter++;
      if(notConnectedCounter > 50) { // Reset board if not connected after 5s
          Serial.println("Resetting due to Wifi not connecting...");
          ESP.restart();
      }
  }
  Serial.print("Wifi connected, IP address: ");
  Serial.println(WiFi.localIP());
  
  Blynk.begin(auth,"TP-Link_380B", "installation*500");
  Serial.println("Initializing Pulse Oximeter..");
 
    if (!pox.begin())
    {
         Serial.println("FAILED");
         for(;;);
    }
    else
    {
         Serial.println("SUCCESS");
         pox.setOnBeatDetectedCallback(onBeatDetected);
    }
 
    // The default current for the IR LED is 50mA and it could be changed by uncommenting the following line.
        pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
        
  Wire1.begin(32,33,100000); 
  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x6B);  // PWR_MGMT_1 register
  Wire1.write(0);     // set to zero (wakes up the MPU-6050)
  Wire1.endTransmission(true);
}

void loop()
{
 
  // Reading data from Accelerometer sensor

  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire1.endTransmission(false);
  Wire1.requestFrom(MPU_addr,14,true);  // request a total of 14 registers
  accelX=Wire1.read()<<8|Wire1.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  accelY=Wire1.read()<<8|Wire1.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  accelZ=Wire1.read()<<8|Wire1.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
  
  gyroX=Wire1.read()<<8|Wire1.read();  // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
  gyroY=Wire1.read()<<8|Wire1.read();  // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
  gyroZ=Wire1.read()<<8|Wire1.read();

  gForceX = (accelX-2050) / 16384.0;
  gForceY = (accelY-77) / 16384.0; 
  gForceZ = (accelZ-1947) / 16384.0;

  rotX = (gyroX+270) / 131.0;
  rotY = (gyroY-351) / 131.0; 
  rotZ = (gyroZ+136) / 131.0;

  // calculating Amplitute vactor for 3 axis
  float Raw_Amp = pow(pow(gForceX,2)+pow(gForceY,2)+pow(gForceZ,2),0.5);
  int Amp = Raw_Amp * 10;  // Mulitiplied by 10 bcz values are between 0 to 1
  int angleChange = pow(pow(rotX,2)+pow(rotY,2)+pow(rotZ,2),0.5);

  // Reading data from pulseoximeter sensor
  pox.update();
  BPM = pox.getHeartRate();
  SpO2 = pox.getSpO2();

  // Uploading data to Blynk server AND printing data on serial monitor
  if (millis() - tsLastReport > REPORTING_PERIOD_MS)
    {
      Blynk.run();
      
      Blynk.virtualWrite(V3, BPM);
      Blynk.virtualWrite(V4, SpO2);
      

      Serial.println(Amp);
      Serial.println(angleChange);

      Serial.print("Heart rate:");
      Serial.print(BPM);
      Serial.print(" bpm / SpO2:");
      Serial.print(SpO2);
      Serial.println(" %");

      tsLastReport = millis();
    }
}
Now I added GPS, so that I can track the location too. And GPS is working along with accelerometer but Pulse oximeter sensor is not working - Output from that is 0 and the rest of the sensors are producing the expected outputs. Program for that is given below

Code: Select all

#include <TinyGPSPlus.h>
#include <HardwareSerial.h>
#include <Arduino.h>
#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define BLYNK_PRINT Serial
#include <Blynk.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "VUjbOe139IPotsyC2Sjx-MQbB54al9s0";   

// For GPS sensor
float latitude , longitude;
String  latitude_string , longitiude_string;
TinyGPSPlus gps;
WidgetMap myMap(V0);
HardwareSerial SerialGPS(2);

// For Pulse sensor
PulseOximeter pox;
float BPM, SpO2;
uint32_t tsLastReport = 0;

// For Accelerometer sensor
const int MPU_addr=0x68;
int16_t accelX, accelY, accelZ, gyroX, gyroY, gyroZ;
float gForceX, gForceY, gForceZ,rotX, rotY, rotZ;

void onBeatDetected()
{
    Serial.println("Beat Detected!");
}

void setup() {
  Serial.begin(115200);

  WiFi.begin("TP-Link", "***********");

  // Wait for wifi to be connected
  uint32_t notConnectedCounter = 0;
  while (WiFi.status() != WL_CONNECTED) {
      delay(100);
      Serial.println("Wifi connecting...");
      notConnectedCounter++;
      if(notConnectedCounter > 50) { // Reset board if not connected after 5s
          Serial.println("Resetting due to Wifi not connecting...");
          ESP.restart();
      }
  }
  Serial.print("Wifi connected, IP address: ");
  Serial.println(WiFi.localIP());
  
  Blynk.begin(auth,"TP-Link_380B", "installation*500");

  // Pulse oximeter setup
  Serial.println("Initializing Pulse Oximeter..");
 
    if (!pox.begin())
    {
         Serial.println("FAILED");
         for(;;);
    }
    else
    {
         Serial.println("SUCCESS");
         pox.setOnBeatDetectedCallback(onBeatDetected);
    }
 
    // The default current for the IR LED is 50mA and it could be changed by uncommenting the following line.
        pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
        
  // Accelerometer setup
  Wire1.begin(32,33,100000); 
  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x6B);  // PWR_MGMT_1 register
  Wire1.write(0);     // set to zero (wakes up the MPU-6050)
  Wire1.endTransmission(true);

 // GPS Setup
 SerialGPS.begin(9600, SERIAL_8N1, 16, 17);
}

void loop()
{

  // Reading data from Accelerometer sensor

  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire1.endTransmission(false);
  Wire1.requestFrom(MPU_addr,14,true);  // request a total of 14 registers
  accelX=Wire1.read()<<8|Wire1.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  accelY=Wire1.read()<<8|Wire1.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  accelZ=Wire1.read()<<8|Wire1.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)

  gyroX=Wire1.read()<<8|Wire1.read();  // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
  gyroY=Wire1.read()<<8|Wire1.read();  // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
  gyroZ=Wire1.read()<<8|Wire1.read();

  gForceX = (accelX-2050) / 16384.0;
  gForceY = (accelY-77) / 16384.0; 
  gForceZ = (accelZ-1947) / 16384.0;

  rotX = (gyroX+270) / 131.0;
  rotY = (gyroY-351) / 131.0; 
  rotZ = (gyroZ+136) / 131.0;

  // calculating Amplitute vactor for 3 axis
  float Raw_Amp = pow(pow(gForceX,2)+pow(gForceY,2)+pow(gForceZ,2),0.5);
  int Amp = Raw_Amp * 10;  // Mulitiplied by 10 bcz values are between 0 to 1

  int angleChange = pow(pow(rotX,2)+pow(rotY,2)+pow(rotZ,2),0.5);

  // Reading data from pulseoximeter sensor

  pox.update();
  BPM = pox.getHeartRate();
  SpO2 = pox.getSpO2();

  // Reading the data from GPS

  if(SerialGPS.available() > 0) {
    if (gps.encode(SerialGPS.read()))
    {
      if (gps.location.isValid())
      {
        latitude = gps.location.lat();
        latitude_string = String(latitude , 6);
        longitude = gps.location.lng();
        longitiude_string = String(longitude , 6);
      }
    }
  }

  // Uploading data to Blynk server AND printing data on serial monitor
  if (millis() - tsLastReport > REPORTING_PERIOD_MS)
    {
      Blynk.run();
      
      Blynk.virtualWrite(V3, BPM);
      Blynk.virtualWrite(V4, SpO2);
      

      Serial.println(Amp);
      Serial.println(angleChange);

      Serial.print("Heart rate:");
      Serial.print(BPM);
      Serial.print(" bpm / SpO2:");
      Serial.print(SpO2);
      Serial.println(" %");

      Blynk.virtualWrite(V0, 1, latitude, longitude, "Location");
      Serial.print("Latitude = ");
      Serial.println(latitude_string);
      Serial.print("Longitude = ");
      Serial.println(longitiude_string);

      tsLastReport = millis();
    }
}
Will you please help me with this. What's wrong with the program.
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mayaradesousa
Posts: 1
Joined: Mon Apr 04, 2022 1:39 am

Re: 2 I2C and 1 UART are not working simultaneously in ESP32

Postby mayaradesousa » Mon Apr 04, 2022 1:43 am

Hello, did you find the problem?
I'm having the same problem!
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dssman
Posts: 17
Joined: Thu May 26, 2022 4:37 pm

Re: 2 I2C and 1 UART are not working simultaneously in ESP32

Postby dssman » Tue Jun 07, 2022 1:02 am

marvelmcufanpage45 wrote: ↑
Mon Oct 25, 2021 1:48 pm
 I have a project in which I have to monitor Acceleration of the subject, Location and Pulse + SpO2 of the subject. So, I've written this program to check data from MAX30100 Pulse Oxi sensor and MPU6050 Accelero and Gyroscope sensor using ESP32 -

This program works completely fine. No issues at all.

Code: Select all

#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define BLYNK_PRINT Serial
#include <Blynk.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "*********************";   

// For Pulse sensor
PulseOximeter pox;
float BPM, SpO2;
uint32_t tsLastReport = 0;

// For Accelerometer sensor
const int MPU_addr=0x68;
int16_t accelX, accelY, accelZ, gyroX, gyroY, gyroZ;
float gForceX, gForceY, gForceZ,rotX, rotY, rotZ;

void onBeatDetected()
{
    Serial.println("Beat Detected!");
}

void setup() {
  Serial.begin(115200);

  WiFi.begin("TP-Link", "**********");

  // Wait for wifi to be connected
  uint32_t notConnectedCounter = 0;
  while (WiFi.status() != WL_CONNECTED) {
      delay(100);
      Serial.println("Wifi connecting...");
      notConnectedCounter++;
      if(notConnectedCounter > 50) { // Reset board if not connected after 5s
          Serial.println("Resetting due to Wifi not connecting...");
          ESP.restart();
      }
  }
  Serial.print("Wifi connected, IP address: ");
  Serial.println(WiFi.localIP());
  
  Blynk.begin(auth,"TP-Link_380B", "installation*500");
  Serial.println("Initializing Pulse Oximeter..");
 
    if (!pox.begin())
    {
         Serial.println("FAILED");
         for(;;);
    }
    else
    {
         Serial.println("SUCCESS");
         pox.setOnBeatDetectedCallback(onBeatDetected);
    }
 
    // The default current for the IR LED is 50mA and it could be changed by uncommenting the following line.
        pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
        
  Wire1.begin(32,33,100000); 
  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x6B);  // PWR_MGMT_1 register
  Wire1.write(0);     // set to zero (wakes up the MPU-6050)
  Wire1.endTransmission(true);
}

void loop()
{
 
  // Reading data from Accelerometer sensor

  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire1.endTransmission(false);
  Wire1.requestFrom(MPU_addr,14,true);  // request a total of 14 registers
  accelX=Wire1.read()<<8|Wire1.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  accelY=Wire1.read()<<8|Wire1.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  accelZ=Wire1.read()<<8|Wire1.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
  
  gyroX=Wire1.read()<<8|Wire1.read();  // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
  gyroY=Wire1.read()<<8|Wire1.read();  // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
  gyroZ=Wire1.read()<<8|Wire1.read();

  gForceX = (accelX-2050) / 16384.0;
  gForceY = (accelY-77) / 16384.0; 
  gForceZ = (accelZ-1947) / 16384.0;

  rotX = (gyroX+270) / 131.0;
  rotY = (gyroY-351) / 131.0; 
  rotZ = (gyroZ+136) / 131.0;

  // calculating Amplitute vactor for 3 axis
  float Raw_Amp = pow(pow(gForceX,2)+pow(gForceY,2)+pow(gForceZ,2),0.5);
  int Amp = Raw_Amp * 10;  // Mulitiplied by 10 bcz values are between 0 to 1
  int angleChange = pow(pow(rotX,2)+pow(rotY,2)+pow(rotZ,2),0.5);

  // Reading data from pulseoximeter sensor
  pox.update();
  BPM = pox.getHeartRate();
  SpO2 = pox.getSpO2();

  // Uploading data to Blynk server AND printing data on serial monitor
  if (millis() - tsLastReport > REPORTING_PERIOD_MS)
    {
      Blynk.run();
      
      Blynk.virtualWrite(V3, BPM);
      Blynk.virtualWrite(V4, SpO2);
      

      Serial.println(Amp);
      Serial.println(angleChange);

      Serial.print("Heart rate:");
      Serial.print(BPM);
      Serial.print(" bpm / SpO2:");
      Serial.print(SpO2);
      Serial.println(" %");

      tsLastReport = millis();
    }
}
Now I added GPS, so that I can track the location too. And GPS is working along with accelerometer but Pulse oximeter sensor is not working - Output from that is 0 and the rest of the sensors are producing the expected outputs. Program for that is given below

Code: Select all

#include <TinyGPSPlus.h>
#include <HardwareSerial.h>
#include <Arduino.h>
#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#define REPORTING_PERIOD_MS 1000
#define BLYNK_PRINT Serial
#include <Blynk.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "VUjbOe139IPotsyC2Sjx-MQbB54al9s0";   

// For GPS sensor
float latitude , longitude;
String  latitude_string , longitiude_string;
TinyGPSPlus gps;
WidgetMap myMap(V0);
HardwareSerial SerialGPS(2);

// For Pulse sensor
PulseOximeter pox;
float BPM, SpO2;
uint32_t tsLastReport = 0;

// For Accelerometer sensor
const int MPU_addr=0x68;
int16_t accelX, accelY, accelZ, gyroX, gyroY, gyroZ;
float gForceX, gForceY, gForceZ,rotX, rotY, rotZ;

void onBeatDetected()
{
    Serial.println("Beat Detected!");
}

void setup() {
  Serial.begin(115200);

  WiFi.begin("TP-Link", "***********");

  // Wait for wifi to be connected
  uint32_t notConnectedCounter = 0;
  while (WiFi.status() != WL_CONNECTED) {
      delay(100);
      Serial.println("Wifi connecting...");
      notConnectedCounter++;
      if(notConnectedCounter > 50) { // Reset board if not connected after 5s
          Serial.println("Resetting due to Wifi not connecting...");
          ESP.restart();
      }
  }
  Serial.print("Wifi connected, IP address: ");
  Serial.println(WiFi.localIP());
  
  Blynk.begin(auth,"TP-Link_380B", "installation*500");

  // Pulse oximeter setup
  Serial.println("Initializing Pulse Oximeter..");
 
    if (!pox.begin())
    {
         Serial.println("FAILED");
         for(;;);
    }
    else
    {
         Serial.println("SUCCESS");
         pox.setOnBeatDetectedCallback(onBeatDetected);
    }
 
    // The default current for the IR LED is 50mA and it could be changed by uncommenting the following line.
        pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
        
  // Accelerometer setup
  Wire1.begin(32,33,100000); 
  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x6B);  // PWR_MGMT_1 register
  Wire1.write(0);     // set to zero (wakes up the MPU-6050)
  Wire1.endTransmission(true);

 // GPS Setup
 SerialGPS.begin(9600, SERIAL_8N1, 16, 17);
}

void loop()
{

  // Reading data from Accelerometer sensor

  Wire1.beginTransmission(MPU_addr);
  Wire1.write(0x3B);  // starting with register 0x3B (ACCEL_XOUT_H)
  Wire1.endTransmission(false);
  Wire1.requestFrom(MPU_addr,14,true);  // request a total of 14 registers
  accelX=Wire1.read()<<8|Wire1.read();  // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
  accelY=Wire1.read()<<8|Wire1.read();  // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
  accelZ=Wire1.read()<<8|Wire1.read();  // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)

  gyroX=Wire1.read()<<8|Wire1.read();  // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
  gyroY=Wire1.read()<<8|Wire1.read();  // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
  gyroZ=Wire1.read()<<8|Wire1.read();

  gForceX = (accelX-2050) / 16384.0;
  gForceY = (accelY-77) / 16384.0; 
  gForceZ = (accelZ-1947) / 16384.0;

  rotX = (gyroX+270) / 131.0;
  rotY = (gyroY-351) / 131.0; 
  rotZ = (gyroZ+136) / 131.0;

  // calculating Amplitute vactor for 3 axis
  float Raw_Amp = pow(pow(gForceX,2)+pow(gForceY,2)+pow(gForceZ,2),0.5);
  int Amp = Raw_Amp * 10;  // Mulitiplied by 10 bcz values are between 0 to 1

  int angleChange = pow(pow(rotX,2)+pow(rotY,2)+pow(rotZ,2),0.5);

  // Reading data from pulseoximeter sensor

  pox.update();
  BPM = pox.getHeartRate();
  SpO2 = pox.getSpO2();

  // Reading the data from GPS

  if(SerialGPS.available() > 0) {
    if (gps.encode(SerialGPS.read()))
    {
      if (gps.location.isValid())
      {
        latitude = gps.location.lat();
        latitude_string = String(latitude , 6);
        longitude = gps.location.lng();
        longitiude_string = String(longitude , 6);
      }
    }
  }

  // Uploading data to Blynk server AND printing data on serial monitor
  if (millis() - tsLastReport > REPORTING_PERIOD_MS)
    {
      Blynk.run();
      
      Blynk.virtualWrite(V3, BPM);
      Blynk.virtualWrite(V4, SpO2);
      

      Serial.println(Amp);
      Serial.println(angleChange);

      Serial.print("Heart rate:");
      Serial.print(BPM);
      Serial.print(" bpm / SpO2:");
      Serial.print(SpO2);
      Serial.println(" %");

      Blynk.virtualWrite(V0, 1, latitude, longitude, "Location");
      Serial.print("Latitude = ");
      Serial.println(latitude_string);
      Serial.print("Longitude = ");
      Serial.println(longitiude_string);

      tsLastReport = millis();
    }
}
Will you please help me with this. What's wrong with the program.
Hi,
how's going now? I have the same question, can you share some info. please?
Thanks
Adam
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