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| arduino code: | | arduino code: |
| | | [[Media:Distance_Sensor_Sending_to_Firebase.ino]] |
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| #include <ESP8266WiFi.h>
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| #include <FirebaseArduino.h>
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| // Set these to run example.
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| #define FIREBASE_HOST "realtime-distance-sensor.firebaseio.com"
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| #define FIREBASE_AUTH "O5IKDBWKoCCPDYGeqxmLhM3Hn5maQZ4Yj3puRSSF"
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| #define WIFI_SSID "AndroidHotspot8432" //"o2-WLAN93"
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| #define WIFI_PASSWORD "5ea71cf6ed4c" //"9592132995009940"
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| #define echoPin D7 // Echo Pin
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| #define trigPin D6 // Trigger Pin
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| long duration, distance; // Duration used to calculate distance
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| void setup() {
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| Serial.begin(115200);
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| pinMode(trigPin, OUTPUT);
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| pinMode(echoPin, INPUT);
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| // connect to wifi.
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| WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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| Serial.print("connecting");
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| while (WiFi.status() != WL_CONNECTED) {
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| Serial.print(".");
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| delay(500);
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| }
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| Serial.println();
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| Serial.print("connected: ");
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| Serial.println(WiFi.localIP());
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| Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
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| }
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| void loop() {
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| digitalWrite(trigPin, LOW);
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| delayMicroseconds(2);
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| digitalWrite(trigPin, HIGH);
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| delayMicroseconds(10);
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| digitalWrite(trigPin, LOW);
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| duration = pulseIn(echoPin, HIGH);
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| //Calculate the distance (in cm) based on the speed of sound.
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| float distance = duration*0.0343/2;
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| Serial.println(distance);
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| Serial.println ( " cm");
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| delay (200);
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| digitalWrite(echoPin, HIGH);
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| //send data to firebase
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| Firebase.setFloat("dist", distance);
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| digitalWrite(echoPin, LOW);
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| delay(1000);
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| }
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