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

#define GLUCOSE_SENSOR_PIN 34 // Analog pin connected to the glucose sensor

const char* ssid = "Wokwi-GUEST";       // Enter your WiFi SSID
const char* password = "";  // Enter your WiFi password

WiFiClient client;

unsigned long channelID = 2480894;  // Enter your ThingSpeak Channel ID
const char* writeAPIKey = "K7EZA72HWEB5D0NC";   // Enter your ThingSpeak Write API Key

void setup() {
  Serial.begin(115200); // Initialize serial communication
  setupWiFi();
}

void loop() {
  // Read glucose level from sensor
  int glucoseLevel = analogRead(GLUCOSE_SENSOR_PIN);

  // Send glucose level data to ThingSpeak
  sendDataToThingSpeak(glucoseLevel);

  // Send glucose level data over UART to Raspberry Pi Pico
  Serial.print("Glucose Level: ");
  Serial.println(glucoseLevel);

  delay(2000); // Delay before next reading
}

void setupWiFi() {
  // Connect to WiFi network
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
}

void sendDataToThingSpeak(int glucoseLevel) {
  // Initialize ThingSpeak client
  ThingSpeak.begin(client);

  // Update ThingSpeak fields with glucose level
  ThingSpeak.setField(1, glucoseLevel);

  // Write data to ThingSpeak
  int statusCode = ThingSpeak.writeFields(channelID, writeAPIKey);
  if (statusCode == 200) {
    Serial.println("ThingSpeak update successful");
  } else {
    Serial.print("Problem updating ThingSpeak. HTTP error code ");
    Serial.println(statusCode);
  }
}