Build date in ota.py (mDNS) (#1736)

* include build_date in mdns (and ota.py)

* ota.py: correct number of dashes in header

code/espurna/mdns.ino

@@ -50,6 +50,7 @@ void mdnsServerSetup() {
     // Public ESPurna related txt for OTA discovery
     MDNS.addServiceTxt("arduino", "tcp", "app_name", APP_NAME);
     MDNS.addServiceTxt("arduino", "tcp", "app_version", APP_VERSION);
+    MDNS.addServiceTxt("arduino", "tcp", "build_date", buildTime());
     MDNS.addServiceTxt("arduino", "tcp", "mac", WiFi.macAddress());
     MDNS.addServiceTxt("arduino", "tcp", "target_board", getBoardName());
     {

code/ota.py

@@ -55,6 +55,7 @@ def on_service_state_change(zeroconf, service_type, name, state_change):
                 'mac': '',
                 'app_name': '',
                 'app_version': '',
+                'build_date': '',
                 'target_board': '',
                 'mem_size': 0,
                 'sdk_size': 0,
@@ -76,7 +77,7 @@ def list_devices():
     """
     Shows the list of discovered devices
     """
-    output_format = "{:>3}  {:<14}  {:<15}  {:<17}  {:<12}  {:<12}  {:<25}  {:<8}  {:<8}  {:<10}"
+    output_format = "{:>3}  {:<14}  {:<15}  {:<17}  {:<12}  {:<12}  {:<20}  {:<25}  {:<8}  {:<8}  {:<10}"
     print(output_format.format(
             "#",
             "HOSTNAME",
@@ -84,12 +85,13 @@ def list_devices():
             "MAC",
             "APP",
             "VERSION",
+            "BUILD_DATE",
             "DEVICE",
             "MEM_SIZE",
             "SDK_SIZE",
             "FREE_SPACE"
     ))
-    print("-" * 139)
+    print("-" * 164)
 
     index = 0
     for device in devices:
@@ -101,6 +103,7 @@ def list_devices():
                 device.get('mac', ''),
                 device.get('app_name', ''),
                 device.get('app_version', ''),
+                device.get('build_date', ''),
                 device.get('target_board', ''),
                 device.get('mem_size', 0),
                 device.get('sdk_size', 0),