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August 20, 2018 12:14
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/* | |
Basic ESP8266 MQTT example, editted for "Grote Schakelaar". REMINDER: PAS DE NETWERKINSTELLINGEN AAN! En zet de topics goed. (En soldeer even een bordje maar dat is minder vergeetbaar) | |
It connects to an MQTT server then: | |
- subscribes to the topic "inTopic", printing out any messages | |
it receives. NB - it assumes the received payloads are strings not binary | |
- If the first character of the topic "inTopic" is an 1, switch ON the ESP Led, | |
else switch it off | |
- Publishes to a topic set below a value set below (hardcoded) | |
It will reconnect to the server if the connection is lost using a blocking | |
reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to | |
achieve the same result without blocking the main loop. | |
To install the ESP8266 board, (using Arduino 1.6.4+): | |
- Add the following 3rd party board manager under "File -> Preferences -> Additional Boards Manager URLs": | |
http://arduino.esp8266.com/stable/package_esp8266com_index.json | |
- Open the "Tools -> Board -> Board Manager" and click install for the ESP8266" | |
- Select your ESP8266 in "Tools -> Board" | |
*/ | |
#include <ESP8266WiFi.h> | |
#include <PubSubClient.h> | |
// Update these with values suitable for your network. | |
const char* ssid = "makerspaceleiden_deelnemers"; // LET OP: DIT IS NOG NIET IN HET CHIPJE GEZET! | |
const char* password = "tuurlijkjohdielaatikgewoonindesourcecodestaanbijpublicatie"; | |
const char* mqtt_server = "space.makerspaceleiden.nl"; | |
const int schak = 4; // welke IO pin zit de schakelaar? | |
WiFiClient espClient; | |
PubSubClient client(espClient); | |
long lastMsg = 0; | |
char msg[50]; | |
int value = 0; | |
void setup() { | |
pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output | |
Serial.begin(115200); | |
setup_wifi(); | |
client.setServer(mqtt_server, 1883); | |
client.setCallback(callback); | |
} | |
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, password); | |
while (WiFi.status() != WL_CONNECTED) { | |
delay(500); | |
Serial.print("."); | |
} | |
Serial.println(""); | |
Serial.println("WiFi connected"); | |
Serial.println("IP address: "); | |
Serial.println(WiFi.localIP()); | |
} | |
void callback(char* topic, byte* payload, unsigned int length) { | |
Serial.print("Message arrived ["); | |
Serial.print(topic); | |
Serial.print("] "); | |
for (int i = 0; i < length; i++) { | |
Serial.print((char)payload[i]); | |
} | |
Serial.println(); | |
// Switch on the LED if an 1 was received as first character | |
if ((char)payload[0] == '1') { | |
digitalWrite(BUILTIN_LED, LOW); // Turn the LED on (Note that LOW is the voltage level | |
// but actually the LED is on; this is because | |
// it is acive low on the ESP-01) | |
} else { | |
digitalWrite(BUILTIN_LED, HIGH); // Turn the LED off by making the voltage HIGH | |
} | |
} | |
void reconnect() { | |
// Loop until we're reconnected | |
while (!client.connected()) { | |
Serial.print("Attempting MQTT connection..."); | |
// Attempt to connect | |
if (client.connect("ESP8266Client")) { | |
Serial.println("connected"); | |
// resubscribe | |
client.subscribe("inTopic"); | |
} else { | |
Serial.print("failed, rc="); | |
Serial.print(client.state()); | |
Serial.println(" try again in 5 seconds"); | |
// Wait 5 seconds before retrying | |
delay(5000); | |
} | |
} | |
} | |
void loop() { | |
if (!client.connected()) { | |
reconnect(); | |
} | |
client.loop(); | |
long now = millis(); | |
if (now - lastMsg > 2000) { | |
lastMsg = now; | |
//++value; | |
//snprintf (msg, 75, "hello world #%ld", value); | |
//Serial.print("Publish message: "); | |
//Serial.println(msg); | |
//client.publish("outTopic", msg); | |
// added: | |
if(digitalRead(schak)) client.publish("space/groteschakelaar", "1"); else client.publish("space/groteschakelaar", "0"); | |
} | |
} |
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