ESP32 MQTT , Node-Red LED 控制
Arduino程式
#include <WiFi.h>
#include <PubSubClient.h>
#include <SPI.h>
#define BUILTIN_LED 26
// Update these with values suitable for your network.
//const char *ssid = "PTS-2F";
//const char *pass = "PTS6662594";
//const char *ssid = "alex9ufo";
//const char *pass = "alex9981";
//const char *ssid = "WBR-2200";
//const char *pass = "0226452362";
const char *ssid = "74170287";
const char *pass = "24063173";
//const char *ssid = "yourSSID"; // change according to your Network - cannot be longer than 32 characters!
//const char *pass = "yourPASSWORD"; // change according to your Network
#define MQTTid "" //id of this mqtt client
#define MQTTip "broker.mqtt-dashboard.com" //ip address or hostname of the mqtt broker
#define MQTTport 1883 //port of the mqtt broker
#define MQTTuser "alex9ufo" //username of this mqtt client
#define MQTTpsw "alex1234" //password of this mqtt client
//#define MQTTuser "your_username" //username of this mqtt client
//#define MQTTpsw "your_password" //password of this mqtt client
#define MQTTpubQos 2 //qos of publish (see README)
#define MQTTsubQos 1 //qos of subscribe
//Variables
long lastMsg = 0;
char jsonChar[100];
String json = "";
bool Flash = false; //true
bool Timer = false; //true
bool Send = false; //true
int Count= 0;
//=============================================================================
boolean pendingDisconnect = false;
void mqttConnectedCb(); // on connect callback
void mqttDisconnectedCb(); // on disconnect callback
void mqttDataCb(char* topic, byte* payload, unsigned int length); // on new message callback
WiFiClient wclient;
PubSubClient client(MQTTip, MQTTport, mqttDataCb, wclient);
//=============================================================================
void mqttConnectedCb() {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish("alex9ufo/led/led_status", jsonChar, MQTTpubQos, true); // true means retain
// ... and resubscribe
client.subscribe("alex9ufo/led/led_event", MQTTsubQos);
}
//=============================================================================
void mqttDisconnectedCb() {
Serial.println("disconnected");
}
//=============================================================================
void mqttDataCb(char* topic, byte* payload, unsigned int length) {
/*
you can convert payload to a C string appending a null terminator to it;
this is possible when the message (including protocol overhead) doesn't
exceeds the MQTT_MAX_PACKET_SIZE defined in the library header.
you can consider safe to do so when the length of topic plus the length of
message doesn't exceeds 115 characters
*/
char* message = (char *) payload;
message[length] = 0;
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
Serial.println(message);
String s = message;
s.trim();
// Switch on the LED if an 1 was received as first character
if (s == "OFF") {
digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level
// but actually the LED is on; this is because
Serial.println("Received OFF , Send LOW TO BuildIn_LED");
Flash = false;
Timer = false;
json ="OFF";
Send = true ;
}
if (s == "ON") {
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off (Note that HIGH is the voltage level
// but actually the LED is on; this is because
Serial.println("Received ON , Send HIGH TO BuildIn_LED");
Flash = false;
Timer = false;
json ="ON";
Send = true ;
}
if (s == "TOGGLE") {
digitalWrite(BUILTIN_LED, !digitalRead(BUILTIN_LED)); // Turn the LED toggle
// but actually the LED is on; this is because
Serial.println("Received TOGGLE , Send Toggle(H->L , L->H) TO BuildIn_LED");
Flash = false;
Timer = false;
json ="TOGGLE";
Send = true ;
}
if (s == "FLASH") {
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off (Note that HIGH is the voltage level
// but actually the LED is on; this is because
Serial.println("Received FLASH , Flashing BuildIn_LED ");
Flash = true;
Timer = false;
json ="FLASH";
Send = true ;
} //if (message[0] == '2')
if (s == "TIMER") {
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off (Note that HIGH is the voltage level
// but actually the LED is on; this is because
Serial.println("Received TIMER , BuildIn_LED ON 5 SEC");
Flash = false;
Timer = true;
Count= 10;
json ="TIMER";
Send = true ;
} //if (message[0] == '2')
}
//======================================================
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
//======================================================
void setup() {
Serial.begin(115200);
setup_wifi();
pinMode(BUILTIN_LED, OUTPUT);
Serial.println(F("Booting...."));
Serial.println(F("Control Build LED ON,OFF,FLASH,TOGGLE,TIMER...."));
}
//======================================================
void process_mqtt() {
if (WiFi.status() == WL_CONNECTED) {
if (client.connected()) {
client.loop();
} else {
// client id, client username, client password, last will topic, last will qos, last will retain, last will message
if (client.connect(MQTTid, MQTTuser, MQTTpsw, MQTTid "/status", 2, true, "0")) {
pendingDisconnect = false;
mqttConnectedCb();
}
}
} else {
if (client.connected())
client.disconnect();
}
if (!client.connected() && !pendingDisconnect) {
pendingDisconnect = true;
mqttDisconnectedCb();
}
}
//======================================================
void loop() {
process_mqtt();
if (Flash)
{
digitalWrite(BUILTIN_LED, !digitalRead(BUILTIN_LED));
delay(500);
}
if (Timer)
{
digitalWrite(BUILTIN_LED, HIGH);
delay(500);
Count=Count-1;
if (Count == 0 ){
Timer=false;
digitalWrite(BUILTIN_LED, LOW);
}
}
if (Send) {
// Convert JSON string to character array
json.toCharArray(jsonChar, json.length()+1);
if (client.connected()) {
Serial.print("Publish message: ");
Serial.println(json);
// Publish JSON character array to MQTT topic
client.publish("alex9ufo/led/led_status",jsonChar);
}
Send = false;
}
} //Loop
//======================================================
Node-Red程式
[{"id":"c683b38b.29c07","type":"mqtt in","z":"780055b2.c3306c","name":"","topic":"alex9ufo/led/led_status","qos":"1","datatype":"auto","broker":"841df58d.ee5e98","x":140,"y":100,"wires":[["da92767.4793288","4de7fad6.a30a64","cd44885a.0ab348"]]},{"id":"da92767.4793288","type":"ui_text","z":"780055b2.c3306c","group":"6c9116b.b62d4e8","order":0,"width":0,"height":0,"name":"","label":"MQTT Suscribe Data : ","format":"{{msg.payload}}","layout":"row-left","x":400,"y":100,"wires":[]},{"id":"49813706.0e0bb8","type":"ui_button","z":"780055b2.c3306c","name":"","group":"6c9116b.b62d4e8","order":0,"width":0,"height":0,"passthru":false,"label":"On led","tooltip":"","color":"white","bgcolor":"","icon":"fa-circle","payload":"Light-emitting diode on","payloadType":"str","topic":"","x":110,"y":300,"wires":[["71c1c14c.dd9a7","1e895ef0.0fdf81"]]},{"id":"8138558a.9f9778","type":"ui_button","z":"780055b2.c3306c","name":"","group":"6c9116b.b62d4e8","order":0,"width":0,"height":0,"passthru":false,"label":"Off led","tooltip":"","color":"black","bgcolor":"","icon":"fa-circle-o","payload":"Light-emitting diode off","payloadType":"str","topic":"","x":110,"y":360,"wires":[["71c1c14c.dd9a7","26ec090f.33d196"]]},{"id":"56de513d.77d14","type":"mqtt out","z":"780055b2.c3306c","name":"","topic":"alex9ufo/led/led_event","qos":"1","retain":"false","broker":"841df58d.ee5e98","x":520,"y":340,"wires":[]},{"id":"71c1c14c.dd9a7","type":"ui_audio","z":"780055b2.c3306c","name":"","group":"6c9116b.b62d4e8","voice":"zh-TW","always":"","x":280,"y":420,"wires":[]},{"id":"4de7fad6.a30a64","type":"function","z":"780055b2.c3306c","name":"Format timestamp","func":"var date = new Date();\nvar h = date.getHours();\nvar m = date.getMinutes();\nvar s = date.getSeconds();\nif(h<10){\n h = '0'+h;\n}\nif(m<10){\n m = '0' + m;\n}\nif(s<10){\n s = '0' + s;\n}\nmsg.payload = msg.payload + ' --> Time:(' + h + ':' + m + ':' + s + ')' ;\n\nreturn msg;","outputs":1,"noerr":0,"x":370,"y":160,"wires":[["f2702b9c.b9abd8","f0f03cd0.85978"]]},{"id":"f2702b9c.b9abd8","type":"function","z":"780055b2.c3306c","name":"Set Line API ","func":"msg.headers = {'content-type':'application/x-www-form-urlencoded','Authorization':'Bearer A4w1wPN1h2WqB7dlfeQyyIAwtggn1kfZSI5LkkCdia1gB'};\nmsg.payload = {\"message\":msg.payload};\nreturn msg;\n\n//oR7KdXvK1eobRr2sRRgsl4PMq23DjDlhfUs96SyUBZu","outputs":1,"noerr":0,"x":550,"y":160,"wires":[["75d380.c445ac8"]]},{"id":"75d380.c445ac8","type":"http request","z":"780055b2.c3306c","name":"","method":"POST","ret":"txt","paytoqs":false,"url":"https://notify-api.line.me/api/notify","tls":"","persist":false,"proxy":"","authType":"","x":700,"y":160,"wires":[["e1dad027.dcc8b"]]},{"id":"e1dad027.dcc8b","type":"debug","z":"780055b2.c3306c","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":750,"y":220,"wires":[]},{"id":"cd44885a.0ab348","type":"debug","z":"780055b2.c3306c","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":370,"y":60,"wires":[]},{"id":"1e895ef0.0fdf81","type":"function","z":"780055b2.c3306c","name":"","func":"msg.payload='ON';\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":270,"y":300,"wires":[["56de513d.77d14"]]},{"id":"26ec090f.33d196","type":"function","z":"780055b2.c3306c","name":"","func":"msg.payload='OFF';\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":270,"y":360,"wires":[["56de513d.77d14"]]},{"id":"f0f03cd0.85978","type":"ui_text","z":"780055b2.c3306c","group":"6c9116b.b62d4e8","order":34,"width":0,"height":0,"name":"","label":"LINE Message : ","format":"{{msg.payload}}","layout":"row-left","x":560,"y":240,"wires":[]},{"id":"841df58d.ee5e98","type":"mqtt-broker","name":"","broker":"broker.mqtt-dashboard.com","port":"1883","clientid":"","usetls":false,"compatmode":false,"keepalive":"15","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closePayload":"","willTopic":"","willQos":"0","willPayload":""},{"id":"6c9116b.b62d4e8","type":"ui_group","name":"LED","tab":"53b8c8f9.cfbe48","order":1,"disp":true,"width":"6","collapse":false},{"id":"53b8c8f9.cfbe48","type":"ui_tab","name":"Home","icon":"dashboard","order":2,"disabled":false,"hidden":false}]
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