Today I am building an ESP8266 based automatic cat feeder that can automatically feed my cat on a regular basis.
In this circuit, we use a:
- ESP8266 Controle module (NodeMCU).
- Servo motor (SG90) is used to deliver and controle the contitier of food.
- DHT11 to get the temperature and humidity of envirenment.
- The internet to set the feed time automatically, monitor and controle manually the system remotley.
The ESP8266 module is connect to mqtt broker and ntp server.
WiFi settings
9 // WiFi settings
10 const char* ssid = "open_wifi";
11 const char* password = "12345678";
12 /* Put IP Address details */
13 IPAddress local_ip(192, 168, 254, 253);
14 IPAddress gateway(192, 168, 254, 254);
15 IPAddress subnet(255, 255, 255, 0);19 // MQTT Broker
20 #include <PubSubClient.h>
21 const char* mqtt_broker = "broker.mqtt.com";
22 const char* mqtt_username = "";
23 const char* mqtt_password = "";
24 const int mqtt_port = 1883;
...
28 #define mqtt_topic(topic) ((String) "qfd564dsf654qsdf/" + topic).c_str()replace qfd564dsf654qsdf with custom main topic 123456789
30 // NTP server
...
33 NTPClient timeClient(ntpUDP, "time.google.com", 3600);
...
35 int default_cycle = 21600; // 21600 Feed every 6 Hour