ipv4 or ipv6 parsed from .env file

final/build.rs

@@ -5,6 +5,7 @@ fn main() {
         println!("cargo:rerun-if-changed={}", dotenv_path.display());
     }
 
+    // Pass WIFI credentials into firmware
     if let Ok(ssid) = std::env::var("SSID") {
         println!("cargo:rustc-env=SSID={}", ssid);
     }
@@ -12,8 +13,16 @@ fn main() {
         println!("cargo:rustc-env=PASSWORD={}", password);
     }
 
+    // Export BROKER_IP and PORT as string envs also (optional, for debugging)
+    if let Ok(ip) = std::env::var("BROKER_IP") {
+        println!("cargo:rustc-env=BROKER_IP={}", ip);
+    }
+    if let Ok(port) = std::env::var("BROKER_PORT") {
+        println!("cargo:rustc-env=BROKER_PORT={}", port);
+    }
+
     linker_be_nice();
-    // make sure linkall.x is the last linker script (otherwise might cause problems with flip-link)
+    // make sure linkall.x is the last linker script
     println!("cargo:rustc-link-arg=-Tlinkall.x");
 }