diff --git a/.gitignore b/.gitignore
index ad67955..0728338 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,8 @@ target
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e4c08c1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "mqtt-remote-gpio"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+gpio = "0.4.1"
+rumqttc = "0.25.1"
+rust-yaml = "1.1.0"
diff --git a/config.schema.json b/config.schema.json
new file mode 100644
index 0000000..4c7a80f
--- /dev/null
+++ b/config.schema.json
@@ -0,0 +1,109 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema",
+    "type": "object",
+    "properties": {
+        "mqtt": {
+            "type": "object",
+            "description": "Configuration of the MQTT server upstream",
+            "properties": {
+                "host": {
+                    "type": "string",
+                    "description": "The hostname or IP of the MQTT server"
+                },
+                "port": {
+                    "type": "number",
+                    "description": "The port of the MQTT server",
+                    "default": 1883
+                },
+                "authentication": {
+                    "type": "boolean",
+                    "description": "Whether or not the endpoint requires authentication",
+                    "default": false
+                }
+            },
+            "if": {
+                "properties": {
+                    "authentication": {
+                        "const": true
+                    }
+                }
+            },
+            "then": {
+                "properties": {
+                    "user": {
+                        "type": "string",
+                        "description": "The username to log into MQTT",
+                        "pattern": "([a-z-_]){2,}"
+                    },
+                    "password": {
+                        "type": "string",
+                        "description": "The user's password",
+                        "pattern": "([\\w!#_\\-()]){3,}"
+                    }
+                },
+                "required": [
+                    "user",
+                    "password"
+                ]
+            },
+            "else": {
+                "additionalProperties": false
+            },
+            "required": [
+                "host",
+                "authentication"
+            ]
+        },
+        "topics": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "topic": {
+                        "type": "string"
+                    },
+                    "pin": {
+                        "type": "number"
+                    },
+                    "mode": {
+                        "type": "string",
+                        "enum": [
+                            "in",
+                            "out"
+                        ],
+                        "description": ""
+                    }
+                },
+                "if": {
+                    "properties": {
+                        "mode": {
+                            "const": "in"
+                        }
+                    }
+                },
+                "then": {
+                    "properties": {
+                        "pollInterval": {
+                            "type": "number",
+                            "description": "The time between polls of the value of the GPIO pin, in milliseconds. Updates are only sent if state changes",
+                            "minimum": 100,
+                            "maximum": 65535
+                        }
+                    },
+                    "required": [
+                        "topic",
+                        "pin",
+                        "mode",
+                        "pollInterval"
+                    ]
+                },
+                "else": {},
+                "required": [
+                    "topic",
+                    "pin",
+                    "mode"
+                ]
+            }
+        }
+    }
+}
diff --git a/config.yml b/config.yml
new file mode 100644
index 0000000..dd315f7
--- /dev/null
+++ b/config.yml
@@ -0,0 +1,7 @@
+# yaml-language-server: $schema=config.schema.json
+mqtt:
+  host: ""
+  port: 1883
+  authentication: true
+  password: "234"
+  user: "mqtt"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..06344dc
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,64 @@
+use rumqttc::{Client, MqttOptions, QoS};
+use std::{fs, thread, time::Duration};
+
+struct Topic {
+    name: String,
+    pin: u16,
+}
+
+fn main() {
+    println!("mqtt-remote-gpio");
+
+    // Read config file
+    let conf = fs::read_to_string("config.yml").unwrap_or_else(|_| String::from("test"));
+    println!("{}", conf);
+
+    pin_setup();
+
+    let mut mqttoptions = MqttOptions::new("mqtt", "10.0.9.60", 1883);
+    mqttoptions.set_keep_alive(Duration::from_secs(5));
+    mqttoptions.set_credentials("mqtt", "PNS#Ka!kk8cb5uYYgXdGZkBvGPP24x");
+    listener(
+        vec![Topic {
+            name: String::from("garage/test"),
+            pin: 0,
+        }],
+        vec![Topic {
+            name: String::from("garage/test"),
+            pin: 0,
+        }],
+        mqttoptions,
+    );
+}
+
+fn pin_setup() {
+    // TODO: Check that a pin is not both in and out
+    println!("Pin setup complete");
+}
+
+/// MQTT connection handler
+///
+/// * `topics`: The MQTT topics to subscribe to
+/// * `mqttoptions`: MQTT options for conenction
+fn listener(subscribe_topics: Vec<Topic>, publish_topics: Vec<Topic>, mqttoptions: MqttOptions) {
+    let (client, mut connection) = Client::new(mqttoptions, 10);
+    for topic in subscribe_topics {
+        client.subscribe(topic.name, QoS::AtMostOnce).unwrap();
+    }
+
+    // Spawn thread to update pins
+    thread::spawn(move || {
+        loop {
+            for topic in &publish_topics {
+                client
+                    .publish(&topic.name, QoS::AtLeastOnce, false, vec![0; 0 as usize])
+                    .unwrap_or_default();
+            }
+        }
+    });
+
+    for (_, notification) in connection.iter().enumerate() {
+        println!("{:?}", notification);
+        // TODO: Handle pin value change instructions
+    }
+}