WeMOS: MQTT send A0 - Revision history

Onnowpurbo at 04:18, 14 June 2022

2022-06-14T04:18:11Z

Onnowpurbo: /* Code */

2022-06-14T04:14:46Z

Code

Onnowpurbo at 04:02, 14 June 2022

2022-06-14T04:02:27Z

Onnowpurbo: Created page with "==Code== #include #include const char* ssid = "Kampus ITTS"; const char* password = "itts2020"; const char* mqttServer = "192.168.17..."

2022-06-14T03:58:38Z

Created page with "==Code== #include <ESP8266WiFi.h> #include <PubSubClient.h> const char* ssid = "Kampus ITTS"; const char* password = "itts2020"; const char* mqttServer = "192.168.17..."

New page

==Code==

#include <ESP8266WiFi.h>
#include <PubSubClient.h>

const char* ssid = "Kampus ITTS";
const char* password = "itts2020";
const char* mqttServer = "192.168.17.25";
const int mqttPort = 1883;
const char* mqttUser = "";
const char* mqttPassword = "";

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.println("Connecting to WiFi..");
}
Serial.println("Connected to the WiFi network");

client.setServer(mqttServer, mqttPort);
client.setCallback(callback);

while (!client.connected()) {
Serial.println("Connecting to MQTT...");

// if (client.connect("ESP8266Client", mqttUser, mqttPassword )) {
if (client.connect("ESP8266Client" )) {

Serial.println("connected");

} else {
Serial.print("failed with state ");
Serial.print(client.state());
delay(2000);
}
}
client.publish("test", "Hello from ESP8266");
client.subscribe("test");
}

void callback(char* topic, byte* payload, unsigned int length) {

Serial.print("Message arrived in topic: ");
Serial.println(topic);

Serial.print("Message:");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
Serial.println("-----------------------");
}

void loop() {
client.publish("test", "Hello from ESP8266");
client.loop();
}

@@ Line 60: / Line 60: @@
     int sensorReading = analogRead(A0);
     char sensorChar[5];
-    client.publish("test", itoa(sensorReading, sensorChar, 4) );
+    client.publish("test", itoa(sensorReading, sensorChar, 10) );
     delay(1000);
+  }

@@ Line 58: / Line 58: @@
   void loop() {
     int sensorReading = analogRead(A0);
-    client.publish("test", sensorReading);
+   char sensorChar[5];
     delay(1000);
+  }