fix: throw propper exceptions and cleanup code

meshtastic/__main__.py

@@ -466,8 +466,8 @@ def onConnected(interface):
 
             print(f"Triggering OTA update on {interface.hostname}...")
             interface.getNode(args.dest, False, **getNode_kwargs).startOTA(
-                mode=admin_pb2.OTA_WIFI,
-                hash=ota.hash_bytes()
+                ota_mode=admin_pb2.OTAMode.OTA_WIFI,
+                ota_file_hash=ota.hash_bytes()
             )
 
             print("Waiting for device to reboot into OTA mode...")
@@ -487,7 +487,7 @@ def onConnected(interface):
                     time.sleep(2)
 
             print("\nOTA update completed successfully!")
-                
+
         if args.enter_dfu:
             closeNow = True
             waitForAckNak = True
@@ -1946,7 +1946,8 @@ def addRemoteAdminArgs(parser: argparse.ArgumentParser) -> argparse.ArgumentPars
 
     group.add_argument(
         "--ota-update",
-        help="Perform an OTA update on the destination node (ESP32, firmware version >=2.7.18, WiFi/TCP only for now). Specify the path to the firmware file.",
+        help="Perform an OTA update on the local node (ESP32, firmware version >=2.7.18, WiFi/TCP only for now). "
+        "Specify the path to the firmware file.",
         metavar="FIRMWARE_FILE",
         action="store",
     )

meshtastic/node.py

@@ -669,17 +669,17 @@ class Node:
 
     def startOTA(
         self,
-        mode: admin_pb2.OTAMode.ValueType,
-        hash: bytes,
+        ota_mode: admin_pb2.OTAMode.ValueType,
+        ota_file_hash: bytes,
     ):
         """Tell the node to start OTA mode (firmware >= 2.7.18)."""
         if self != self.iface.localNode:
-            raise Exception("startOTA only possible in local node")
+            raise ValueError("startOTA only possible in local node")
 
         self.ensureSessionKey()
         p = admin_pb2.AdminMessage()
-        p.ota_request.reboot_ota_mode=mode
-        p.ota_request.ota_hash=hash
+        p.ota_request.reboot_ota_mode = ota_mode
+        p.ota_request.ota_hash = ota_file_hash
 
         return self._sendAdmin(p)
 

meshtastic/ota.py

@@ -1,4 +1,6 @@
-import os 
+"""Meshtastic ESP32 Unified OTA
+"""
+import os
 import hashlib
 import socket
 import logging
@@ -11,13 +13,18 @@ logger = logging.getLogger(__name__)
 def _file_sha256(filename: str):
     """Calculate SHA256 hash of a file."""
     sha256_hash = hashlib.sha256()
-    
+
     with open(filename, "rb") as f:
         for byte_block in iter(lambda: f.read(4096), b""):
             sha256_hash.update(byte_block)
 
     return sha256_hash
 
+
+class OTAError(Exception):
+    """Exception for OTA errors."""
+
+
 class ESP32WiFiOTA:
     """ESP32 WiFi Unified OTA updates."""
 
@@ -28,21 +35,21 @@ class ESP32WiFiOTA:
         self._socket: Optional[socket.socket] = None
 
         if not os.path.exists(self._filename):
-            raise Exception(f"File {self._filename} does not exist")
+            raise FileNotFoundError(f"File {self._filename} does not exist")
 
         self._file_hash = _file_sha256(self._filename)
 
     def _read_line(self) -> str:
         """Read a line from the socket."""
         if not self._socket:
-            raise Exception("Socket not connected")
+            raise ConnectionError("Socket not connected")
 
         line = b""
         while not line.endswith(b"\n"):
             char = self._socket.recv(1)
-            
+
             if not char:
-                raise Exception("Connection closed while waiting for response")
+                raise ConnectionError("Connection closed while waiting for response")
 
             line += char
 
@@ -78,10 +85,11 @@ class ESP32WiFiOTA:
                 response = self._read_line()
                 if response == "OK":
                     break
-                elif response == "ERASING":
+
+                if response == "ERASING":
                     logger.info("Device is erasing flash...")
                 elif response.startswith("ERR "):
-                    raise Exception(f"Device reported error: {response}")
+                    raise OTAError(f"Device reported error: {response}")
                 else:
                     logger.warning(f"Unexpected response: {response}")
 
@@ -105,18 +113,16 @@ class ESP32WiFiOTA:
             logger.info("Firmware sent, waiting for verification...")
             while True:
                 response = self._read_line()
-
                 if response == "OK":
                     logger.info("OTA update completed successfully!")
                     break
-                elif response == "ACK":
-                    continue
-                elif response.startswith("ERR "):
-                    raise Exception(f"OTA update failed: {response}")
-                else:
+
+                if response.startswith("ERR "):
+                    raise OTAError(f"OTA update failed: {response}")
+                elif response != "ACK":
                     logger.warning(f"Unexpected final response: {response}")
 
         finally:
             if self._socket:
                 self._socket.close()
-                self._socket = None
+                self._socket = None