Code Arduino ESP8266 SCI Smart Farm

Code Arduino ESP8266 SCI Smart Farm
- Connect Wifi
- อ่านค่าความชื้น
- ส่งค่า Home Assistant (192.168.0.202) --> Home Assistant ทำ Auto Scrip สั่งปิดเปิด SunOff อีกที

1. #include <ESP8266WiFi.h>
2. #include <PubSubClient.h>
3.  
4. // Update these with values suitable for your network.
5. const char* ssid = "xxxxxx";
6. const char* password = "xxxxxx";
7. const char* mqtt_server = "192.168.2.202";
8. int sensorPin = A0; // select the input pin for the potentiometer
9. int sensorValue = 0; // variable to store the value coming from the sensor
10.  
11. WiFiClient espClient;
12. PubSubClient client(espClient);
13. long lastMsg = 0;
14. char msg[50];
15. int value = 0;
16. char output;
17. unsigned long seconds = 1000L; //Notice the L
18. unsigned long minutes = seconds * 60;
19.  
20. void setup() {
21.   pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
22.   Serial.begin(115200);
23.   setup_wifi();
24.   client.setServer(mqtt_server, 1883);
25.   client.setCallback(callback);
26.    
27. }
28.  
29. void setup_wifi() {
30.  
31.   delay(10);
32.   // We start by connecting to a WiFi network
33.   Serial.println();
34.   Serial.print("Connecting to ");
35.   Serial.println(ssid);
36.  
37.   WiFi.begin(ssid, password);
38.  
39.   while (WiFi.status() != WL_CONNECTED) {
40.     delay(500);
41.     Serial.print(".");
42.   }
43.  
44.   Serial.println("");
45.   Serial.println("WiFi connected");
46.   Serial.println("IP address: ");
47.   Serial.println(WiFi.localIP());
48. }
49.  
50. void callback(char* topic, byte* payload, unsigned int length) {
51.   Serial.print("Message arrived [");
52.   Serial.print(topic);
53.   Serial.print("] ");
54.   for (int i = 0; i < length; i++) {
55.     Serial.print((char)payload[i]);
56.   }
57.   Serial.println();
58.  
59.   // Switch on the LED if an 1 was received as first character
60.   if ((char)payload[0] == '1') {
61.     digitalWrite(BUILTIN_LED, LOW);   // Turn the LED on (Note that LOW is the voltage level
62.     // but actually the LED is on; this is because
63.     // it is acive low on the ESP-01)
64.   } else {
65.     digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
66.   }
67.  
68. }
69.  
70. void reconnect() {
71.  
72.   // Loop until we're reconnected
73.   while (!client.connected()) {
74.     Serial.print("Attempting MQTT connection...");
75.     // Attempt to connect
76.     //client.connect(clientName, username, password )
77.     if (client.connect("ESP8266Client","sci", "x1x2x3")) {
78.       Serial.println("connected");
79.       // Once connected, publish an announcement...
80.       client.publish("outTopic", "connected MQTT");
81.       // ... and resubscribe
82.       client.subscribe("inTopic");
83.     } else {
84.       Serial.print("failed, rc=");
85.       Serial.print(client.state());
86.       Serial.println(" try again in 5 seconds");
87.       // Wait 5 seconds before retrying
88.       delay(5000);
89.     }
90.   }
91. }
92. void loop() {
93.  
94.   if (!client.connected()) {
95.     reconnect();
96.   }
97.   client.loop();
98.   // 1000 = 1s
99.   //1 hour
100.   //delay(60UL * 60UL * 1000UL);  //60 minutes each of 60 seconds each of 1000 milliseconds all unsigned longs
101.   //delay(20000);
102.  
103.   long now = millis();
104.   if (now - lastMsg > 3000) {
105.     lastMsg = now;
106.     //read the value from the sensor:
107.     sensorValue = analogRead(sensorPin);
108.     Serial.print("sensor = " );
109.     Serial.println(sensorValue);
110.     sprintf (msg,"%d", sensorValue);
111.     client.publish("garden/moisture", msg);
112.   }  
113.  
114. }