#include <ThingSpeak.h>
#include <WiFi.h>
#include <DHTesp.h>

WiFiClient client;
long myChannelNumber = 2768188;
const char * myWriteAPIKey = "X9RSOFOH763ULDX8";
int statusCode;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";  

DHTesp jeeva;
TempAndHumidity data;

#define ncom 3
char commar[ncom] = {0x1,0x3,0x5};
char respar[ncom][30]={"BLOOD PRESSURE: ","PULSE RATE: ","OXYGEN: "};
uint8_t rtValue[ncom];

int temp;

void setup() {
  ThingSpeak.begin(client);  

  WiFi.mode(WIFI_STA);

  Serial2.begin(9600, SERIAL_8N1, 16, 17);
  
  jeeva.setup(15, DHTesp::DHT22);
  Serial.begin(9600);
}

void sendData() {
  for (uint8_t i = 0; i< ncom;i++)
  {
    Serial2.print((char)commar[i]);
    if (Serial2.available())
    { 
      rtValue[i]= Serial2.read(); 
      Serial2.flush();
      Serial.print(respar[i]);
      Serial.println(rtValue[i]);
    }
  }}

void loop() {

  data= jeeva.getTempAndHumidity();
  int temp=int(data.temperature);

  if(WiFi.status() != WL_CONNECTED)  
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 

  ThingSpeak.setField(1, rtValue[2]);
  ThingSpeak.setField(2, rtValue[0]);
  ThingSpeak.setField(3, rtValue[1]);
  ThingSpeak.setField(4, temp);

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode == 200) { 
    Serial.println("Channel update successful.");
    }
    else {
      Serial.println("Problem Writing data. HTTP error code :" +
      String(statusCode));
      }
      delay(10);
}