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📺 Watch the Video View on YouTube --- Idea To convert an automatic trash can into a smart one. Hardware - Automatic Trash Can - Wemos D1 mini (ESP826...
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To convert an automatic trash can into a smart one.
Here we use an ESP8266 to tap into the pins and emulate a physical button press. The ESP8266 uses a code as described in https://github.com/debsahu/SmartTrashCan to emulate a Wemo Switch, which is detected by Alexa/Echo device as a switch.
| Library | Link | Use |
|---|---|---|
| Wemo Switch Emulator Library | https://github.com/witnessmenow/esp8266-alexa-wemo-emulator | comm |
AlexaDustbin.ino
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <Ticker.h>
#include <WemoSwitch.h> // https://github.com/witnessmenow/esp8266-alexa-wemo-emulator
#include <WemoManager.h>
#include <CallbackFunction.h>
//#include "secret.h"
#include "version.h"
#define HOSTNAME "Trash can"
#ifndef SECRET
const char* ssid = "<WiFiSSID>";
const char* password = "<WiFiPassword>";
const char* otapassword = "<ArduinoOTAPassword>";
#endif
const int OffPin = D2;
const int OnPin = D5;
float timerDelay = 15.0; // (s) delay for autoclose after opening
/////////////////////////////////////////////
WemoManager wemoManager;
WemoSwitch *light = NULL;
Ticker baseOff;
Ticker autoTimer;
void bothOff() {
digitalWrite(OffPin, LOW);
digitalWrite(OnPin, LOW);
baseOff.detach();
}
void lightOn() {
Serial.print("Open Lid ...");
digitalWrite(OnPin, HIGH);
baseOff.attach(0.05, bothOff);
autoTimer.attach(timerDelay, lightOff);
}
void lightOff() {
Serial.print("Close Lid ...");
digitalWrite(OffPin, HIGH);
baseOff.attach(0.05, bothOff);
autoTimer.detach();
}
void setup() {
Serial.begin(115200);
// Set WiFi to station mode and disconnect from an AP if it was Previously
// connected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
// Attempt to connect to Wifi network:
Serial.print("Connecting Wifi: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println("Connection Failed! Rebooting...");
delay(5000);
ESP.restart();
}
ArduinoOTA.setHostname(HOSTNAME);
ArduinoOTA.setPassword(otapassword);
ArduinoOTA.onStart([]() {
String type;
if (ArduinoOTA.getCommand() == U_FLASH) {
type = "sketch";
} else { // U_SPIFFS
type = "filesystem";
}
Serial.println("Start updating " + type);
});
ArduinoOTA.onEnd([]() {
Serial.println("\nEnd"); });
ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
Serial.printf("Progress: %u%%\r", (progress / (total / 100))); });
ArduinoOTA.onError([](ota_error_t error) {
Serial.printf("Error[%u]: ", error);
if (error == OTA_AUTH_ERROR) {
Serial.println("Auth Failed");
} else if (error == OTA_BEGIN_ERROR) {
Serial.println("Begin Failed");
} else if (error == OTA_CONNECT_ERROR) {
Serial.println("Connect Failed");
} else if (error == OTA_RECEIVE_ERROR) {
Serial.println("Receive Failed");
} else if (error == OTA_END_ERROR) {
Serial.println("End Failed");
}
});
ArduinoOTA.begin();
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
IPAddress ip = WiFi.localIP();
Serial.println(ip);
wemoManager.begin();
// Format: Alexa invocation name, local port no, on callback, off callback
light = new WemoSwitch(HOSTNAME, 80, lightOn, lightOff);
wemoManager.addDevice(*light);
pinMode(OffPin, OUTPUT);
pinMode(OnPin, OUTPUT);
bothOff();
}
void loop() {
ArduinoOTA.handle();
wemoManager.serverLoop();
}