diff --git a/src/c3nav/mesh/consumers.py b/src/c3nav/mesh/consumers.py
index 295beb0e..e4a1af62 100644
--- a/src/c3nav/mesh/consumers.py
+++ b/src/c3nav/mesh/consumers.py
@@ -12,14 +12,22 @@ class MeshConsumer(AsyncWebsocketConsumer):
         print('disconnected!')
         pass
 
+    async def send_msg(self, msg):
+        print('Sending message:', msg)
+        await self.send(bytes_data=msg.encode())
+
     async def receive(self, text_data=None, bytes_data=None):
         if bytes_data is None:
             return
         msg = messages.Message.decode(bytes_data)
         print('Received message:', msg)
         if isinstance(msg, messages.MeshSigninMessage):
-            await self.send(bytes_data=messages.MeshLayerAnnounceMessage(
+            await self.send_msg(messages.MeshLayerAnnounceMessage(
                 src='00:00:00:00:00:00',
                 dst=msg.src,
                 layer=messages.NO_LAYER
-            ).encode())
+            ))
+            await self.send_msg(messages.ConfigDumpMessage(
+                src='00:00:00:00:00:00',
+                dst=msg.src,
+            ))
diff --git a/src/c3nav/mesh/messages.py b/src/c3nav/mesh/messages.py
index f3a915da..eaeaf656 100644
--- a/src/c3nav/mesh/messages.py
+++ b/src/c3nav/mesh/messages.py
@@ -14,7 +14,36 @@ class SimpleFormat:
         return struct.pack(self.fmt, value)
 
     def decode(self, data: bytes):
-        return struct.unpack(self.fmt, data[:self.size]), data[self.size:]
+        value = struct.unpack(self.fmt, data[:self.size])
+        if len(value) == 1:
+            value = value[0]
+        return value, data[self.size:]
+
+
+class FixedStrFormat:
+    def __init__(self, num):
+        self.num = num
+
+    def encode(self, value):
+        return struct.pack('%ss' % self.num, value)
+
+    def decode(self, data: bytes):
+        return struct.unpack('%ss' % self.num, data[:self.num])[0].rstrip(bytes((0, ))).decode(), data[self.num:]
+
+
+class HexFormat:
+    def __init__(self, num, sep=''):
+        self.num = num
+        self.sep = sep
+
+    def encode(self, value):
+        return struct.pack('%ss' % self.num, bytes.fromhex(value))
+
+    def decode(self, data: bytes):
+        return (
+            struct.unpack('%ss' % self.num, data[:self.num])[0].hex(*([self.sep] if self.sep else [])),
+            data[self.num:]
+        )
 
 
 class VarStrFormat:
@@ -66,7 +95,7 @@ class Message:
 
     @classmethod
     def decode(cls, data: bytes):
-        print('decode', ' '.join(('%02x' % i) for i in data))
+        print('decode', data.hex(' '))
         klass = cls.msg_types[data[12]]
         values = {}
         for field_ in fields(klass):
@@ -103,3 +132,22 @@ class MeshAddDestinationsMessage(Message, msg_id=0x05):
 @dataclass
 class MeshRemoveDestinationsMessage(Message, msg_id=0x06):
     mac_addresses: list[str] = field(default_factory=list, metadata={'format': MacAddressesListFormat()})
+
+
+@dataclass
+class ConfigDumpMessage(Message, msg_id=0x10):
+    pass
+
+
+@dataclass
+class ConfigFirmwareMessage(Message, msg_id=0x11):
+    magic_word: int = field(metadata={'format': SimpleFormat('I')}, repr=False)
+    secure_version: int = field(metadata={'format': SimpleFormat('I')})
+    reserv1: int = field(metadata={'format': SimpleFormat('2I')}, repr=False)
+    version: str = field(metadata={'format': FixedStrFormat(32)})
+    project_name: str = field(metadata={'format': FixedStrFormat(32)})
+    compile_time: str = field(metadata={'format': FixedStrFormat(16)})
+    compile_date: str = field(metadata={'format': FixedStrFormat(16)})
+    idf_version: str = field(metadata={'format': FixedStrFormat(32)})
+    app_elf_sha256: str = field(metadata={'format': HexFormat(32)})
+    reserv2: int = field(metadata={'format': SimpleFormat('20I')}, repr=False)