From 7d77c5b0513f6046b8c8b2798cf0bc16c0685b1e Mon Sep 17 00:00:00 2001
From: "Tanner Collin (aider)" <git@tannercollin.com>
Date: Sat, 21 Jun 2025 13:48:44 -0600
Subject: [PATCH] feat: Use MAC address for unique device name

---
 firmware/firmware.ino | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 69030bd..9f73bdb 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -11,6 +11,8 @@ WiFiClient wc;
 MqttClient mqttClient(wc);
 ESP8266WebServer server(80);
 
+String deviceName;
+
 #define OUTPUT_PIN 4
 
 
@@ -31,9 +33,17 @@ void setup() {
 	Serial.println("");
 	Serial.println("===== BOOT UP =====");
 
+	// Generate device name from MAC address
+	String mac = WiFi.macAddress();
+	mac.replace(":", ""); // Remove colons from MAC address
+	String shortMac = mac.substring(0, 4);
+	deviceName = "mega_" + shortMac;
+	Serial.print("[SYSTEM] Generated device name: ");
+	Serial.println(deviceName);
+
 	static int error_count = 0;
 
-	WiFi.hostname("airmega");
+	WiFi.hostname(deviceName.c_str());
 	WiFi.mode(WIFI_STA);
 	WiFi.begin(SECRET_SSID, SECRET_PASS);
 
@@ -84,7 +94,7 @@ void setup() {
 	server.begin();
 	Serial.println("[HTTP] server started");
 
-	mqttClient.setId("airmega");
+	mqttClient.setId(deviceName.c_str());
 
 	Serial.print("[MQTT] Attempting to connect to the MQTT broker: ");
 	Serial.println(broker);