MAX30100 gives zero outputs #83
Description
Troubleshooting checklist
- [done] I read the README (on master) thoroughly
- [done] I ran the MAX30100_Tester and I'm going to paste the output down below
- [done] I filled in all the details of my setup down below
Description of the issue
MAX30100 works fine in a simple example, but it gives zero outputs in a project.
my graduation project collects the patient's facial signs (heart rate, SpO2, Temp) and sends them via ESP8266 to Thingspeak, but I don't know why max30100 gives zero outputs and doesn't send the results to thingspeak?
Here is my code:
#define USE_ARDUINO_INTERRUPTS true
#define DEBUG true
#define SSID "Mohammed" // "SSID-WiFiname"
#define PASS "1234567890abc" // "password"
#define IP "184.106.153.149" // thingspeak.com ip
#define REPORTING_PERIOD_MS 1000
#include <Event.h>
#include <Timer.h>
#include <Wire.h>
#include "MAX30100_PulseOximeter.h"
#include <SoftwareSerial.h>
#include "Timer.h"
Timer t;
PulseOximeter pox;
uint32_t tsLastReport = 0;
String msg = "GET /update?key=ETIEQG6HXQYK2TWG"; //API key
SoftwareSerial esp8266(2,3); //RX, TX
//Variables
float myTemp;
int myBPM;
int mySpO2;
String BPM;
String temp;
int error;
int raw_myTemp;
float Voltage;
float tempC;
void onBeatDetected()
{
Serial.println("Beat!");
}
void setup()
{
Serial.begin(9600);
esp8266.begin(115200);
Serial.print("Initializing pulse oximeter..");
if (!pox.begin()) {
Serial.println("FAILED");
for(;;);
} else {
Serial.println("SUCCESS");
}
pox.setOnBeatDetectedCallback(onBeatDetected);
Serial.println("AT");
esp8266.println("AT");
delay(3000);
if(esp8266.find("OK"))
{
connectWiFi();
}
t.every(10000, getReadings);
t.every(10000, updateInfo);
}
void loop()
{
pox.update();
myBPM = pox.getHeartRate();
mySpO2 = pox.getSpO2();
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
Serial.print("Heart rate: ");
Serial.print(myBPM);
Serial.print("bpm / SpO2: ");
Serial.print(mySpO2);
Serial.println("%");
tsLastReport = millis();
}
start: //label
error=0;
t.update(); //Resend if transmission is not completed
if (error==1)
{
goto start; //go to label "start"
}
delay(4000);
}
void updateInfo()
{
String cmd = "AT+CIPSTART=\"TCP\",\"";
cmd += IP;
cmd += "\",80";
Serial.println(cmd);
esp8266.println(cmd);
delay(2000);
if(esp8266.find("Error"))
{
return;
}
cmd = msg ;
cmd += "&field1="; //field 1 for BPM
cmd += BPM;
cmd += "&field2="; //field 2 for temperature
cmd += temp;
cmd += "\r\n";
Serial.print("AT+CIPSEND=");
esp8266.print("AT+CIPSEND=");
Serial.println(cmd.length());
esp8266.println(cmd.length());
if(esp8266.find(">"))
{
Serial.print(cmd);
esp8266.print(cmd);
}
else
{
Serial.println("AT+CIPCLOSE");
esp8266.println("AT+CIPCLOSE");
//Resend...
error=1;
}
}
boolean connectWiFi()
{
Serial.println("AT+CWMODE=1");
esp8266.println("AT+CWMODE=1");
delay(2000);
String cmd="AT+CWJAP=\"";
cmd+=SSID;
cmd+="\",\"";
cmd+=PASS;
cmd+="\"";
Serial.println(cmd);
esp8266.println(cmd);
delay(5000);
if(esp8266.find("OK"))
{
return true;
}
else
{
return false;
}
}
void getReadings()
{
raw_myTemp = analogRead(A1);
Voltage = (raw_myTemp / 1023.0) * 5000; // 5000 to get millivots.
tempC = Voltage * 0.1;
myTemp = (tempC * 1.8) + 32; // conver to F
Serial.print("TEMP= ");
Serial.println(myTemp);
myBPM= pox.getHeartRate();
delay(20);
char buffer1[10];
char buffer2[10];
BPM = dtostrf(myBPM, 4, 1, buffer1);
temp = dtostrf(myTemp, 4, 1, buffer2);
}
the result
Details of my setup
- Arduino hardware: Arduino UNO
- MAX30100 breakout: https://www.tokopedia.com/wdelectronic/max30100-heart-rate-sensor-module-green-board?src=topads
- Arduino framework version: Arduino IDE 1.8.15
- MAX30100 library version: