#define BLYNK_TEMPLATE_ID "TMPL3EBjQTLfC"
#define BLYNK_TEMPLATE_NAME "SOIL MONITORING SYSTEM"
#define BLYNK_AUTH_TOKEN "2YIrIxlnhKcmkvBGlOCbmGC9IY2bKWoN"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>


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

#define ncom 3
char commar[ncom] = {0x1,0x3,0x5};
char respar[ncom][30]={"NITROGEN: ","PHOSPHORUS: ","POTASSIUM: "};
uint8_t rtValue[ncom];

BlynkTimer timer;

void setup() {
  
  Serial.begin(115200);
  Serial2.begin(9600, SERIAL_8N1, 16, 17);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);  
  
  timer.setInterval(2000L, sendData);
}

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]);
    }
  }
  
 Blynk.virtualWrite(V0, rtValue[2]); 
 Blynk.virtualWrite(V1, rtValue[0]);
 Blynk.virtualWrite(V2, rtValue[1]);
}

void loop() {
  Blynk.run();
  timer.run();
}