From f71ae18a7bf575dc91ad1fc4aa87c68312d14404 Mon Sep 17 00:00:00 2001
From: Siwat Sirichai <siwat@siwatinc.com>
Date: Tue, 25 Jun 2024 16:13:11 +0700
Subject: [PATCH] basic codes

---
 platformio.ini |   2 +
 src/main.cpp   | 102 ++++++++++++++++++++++++++++++++++++++++++++-----
 src/main.hpp   |  30 +++++++++++++++
 3 files changed, 125 insertions(+), 9 deletions(-)
 create mode 100644 src/main.hpp

diff --git a/platformio.ini b/platformio.ini
index ea23b77..8947044 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,3 +12,5 @@
 platform = atmelavr
 board = uno
 framework = arduino
+lib_deps = robtillaart/DHTNEW@^0.4.20
+monitor_speed = 115200
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index cb9fbba..9bc3414 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,18 +1,102 @@
-#include <Arduino.h>
+#include <main.hpp>
 
-// put function declarations here:
-int myFunction(int, int);
+DHTNEW tempSensor(DHT_PIN);
 
+/**
+ * Initializes the necessary configurations and pin modes for the program.
+ * This function is called only once when the program starts.
+ */
 void setup() {
-  // put your setup code here, to run once:
-  int result = myFunction(2, 3);
+  Serial.begin(115200);
+  pinMode(LED1_PIN, OUTPUT);
+  pinMode(LED2_PIN, OUTPUT);
+  pinMode(LED3_PIN, OUTPUT);
+  pinMode(LED4_PIN, OUTPUT);
+  pinMode(FANA_PIN_PWM, OUTPUT);
+  pinMode(FANA_PIN_EN, OUTPUT);
+  pinMode(FANB_PIN_PWM, OUTPUT);
+  pinMode(FANB_PIN_EN, OUTPUT);
+  pinMode(BUZZER_PIN, OUTPUT);
 }
 
+/**
+ * The main loop function that runs repeatedly in the program.
+ * It reads the temperature, controls the fan and LED based on the temperature,
+ * and performs error handling if temperature reading fails.
+ */
 void loop() {
-  // put your main code here, to run repeatedly:
+  int temperature = readTemperature();
+  if (temperature == DHT_ERROR_VALUE) {
+    Serial.println("Error reading temperature");
+    return;
+  }
+  Serial.print("Temperature: ");
+  Serial.println(temperature);
+  if (temperature > FAN_ON_TEMP) {
+    turnFanOn();
+    turnLedOn();
+    buzz();
+  } else {
+    turnFanOff();
+    turnLedOff();
+  }
 }
 
-// put function definitions here:
-int myFunction(int x, int y) {
-  return x + y;
+/**
+ * @brief Reads the temperature from the DHT sensor.
+ * 
+ * @return The temperature value in Celsius, or DHT_ERROR_VALUE if there was an error reading the temperature.
+ */
+float readTemperature() {
+  int status = tempSensor.read();
+  return status == DHTLIB_OK ? tempSensor.getTemperature() : DHT_ERROR_VALUE;
+}
+
+/**
+ * @brief Turns on the fans.
+ */
+void turnFanOn() {
+  digitalWrite(FANA_PIN_EN, HIGH);
+  analogWrite(FANA_PIN_PWM, FAN_SPEED);
+  digitalWrite(FANB_PIN_EN, HIGH);
+  analogWrite(FANB_PIN_PWM, FAN_SPEED);
+}
+
+/**
+ * @brief Turns off the fans.
+ */
+void turnFanOff() {
+  digitalWrite(FANA_PIN_EN, LOW);
+  analogWrite(FANA_PIN_PWM, 0);
+  digitalWrite(FANB_PIN_EN, LOW);
+  analogWrite(FANB_PIN_PWM, 0);
+}
+
+/**
+ * @brief Turns on the LEDs.
+ */
+void turnLedOn() {
+  digitalWrite(LED1_PIN, HIGH);
+  digitalWrite(LED2_PIN, HIGH);
+  digitalWrite(LED3_PIN, HIGH);
+  digitalWrite(LED4_PIN, HIGH);
+}
+
+/**
+ * @brief Turns off the LEDs.
+ */
+void turnLedOff() {
+  digitalWrite(LED1_PIN, LOW);
+  digitalWrite(LED2_PIN, LOW);
+  digitalWrite(LED3_PIN, LOW);
+  digitalWrite(LED4_PIN, LOW);
+}
+
+/**
+ * @brief Activates the buzzer.
+ */
+void buzz() {
+  digitalWrite(BUZZER_PIN, HIGH);
+  delay(100);
+  digitalWrite(BUZZER_PIN, LOW);
 }
\ No newline at end of file
diff --git a/src/main.hpp b/src/main.hpp
new file mode 100644
index 0000000..8f07dd4
--- /dev/null
+++ b/src/main.hpp
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <Arduino.h>
+#include <dhtnew.h>
+
+#define LED1_PIN 9
+#define LED2_PIN 6
+#define LED3_PIN 5
+#define LED4_PIN 3
+#define FANA_PIN_PWM 10
+#define FANA_PIN_EN 12
+#define FANB_PIN_PWM 11
+#define FANB_PIN_EN 13
+#define BUZZER_PIN 4
+#define DHT_PIN 2
+
+#define FAN_ON_TEMP 35
+#define FAN_SPEED 120
+
+#define DHT_ERROR_VALUE -999
+
+void setup();
+void loop();
+
+float readTemperature();
+void turnFanOn();
+void turnFanOff();
+void turnLedOn();
+void turnLedOff();
+void buzz();
\ No newline at end of file