Use ESP32 hostname for built-in mDNS

main.py

@@ -15,11 +15,21 @@ KEY_HOLD_MS = 80
 def connect_wifi(settings):
     wlan = network.WLAN(network.STA_IF)
     wlan.active(True)
+    set_mdns_hostname(wlan)
     if not wlan.isconnected():
         wlan.connect(settings["wifi_ssid"], settings["wifi_password"])
     return wlan
 
 
+def set_mdns_hostname(wlan):
+    """Set the hostname used by ESP32's built-in mDNS responder."""
+    try:
+        network.hostname("polterhid")
+    except AttributeError:
+        # Older ESP32 builds expose the same setting through the WLAN object.
+        wlan.config(dhcp_hostname="polterhid")
+
+
 def seconds_to_ms(seconds):
     return seconds * 1000
 
@@ -41,15 +51,6 @@ def ip_address(wlan):
         return wlan.ifconfig()[0]
 
 
-def start_mdns():
-    """Advertise the configuration page as http://polterhid.local/."""
-    import mdns
-
-    server = mdns.Server()
-    server.init("polterhid", "PolterHID")
-    server.advertise_service("_http", "_tcp", 80, "PolterHID")
-    return server
-
 
 def main():
     settings = load()
@@ -72,8 +73,6 @@ def main():
     release_at = None
     consumer_release_at = None
     next_wifi_retry = now
-    mdns_server = None
-    next_mdns_retry = now
     next_display_refresh = now
 
     while True:
@@ -90,16 +89,6 @@ def main():
             display.update(settings["wifi_ssid"], address)
             next_display_refresh = time.ticks_add(now, 1000)
 
-        if (wlan.isconnected() and mdns_server is None and
-                time.ticks_diff(now, next_mdns_retry) >= 0):
-            try:
-                mdns_server = start_mdns()
-                print("mDNS available at http://polterhid.local/")
-            except (ImportError, OSError, AttributeError) as error:
-                # Keep HID and web handling available by IP if this firmware
-                # build lacks mDNS or Wi-Fi is not ready yet.
-                print("mDNS unavailable:", error)
-                next_mdns_retry = time.ticks_add(now, 10000)
 
         if release_at is not None and time.ticks_diff(now, release_at) >= 0:
             hid.release_keys()