Implement PushButton packet

MAXPacket.py

@@ -1,5 +1,5 @@
 import math
-
+from enum import Enum
 
 class MAXPacketFactory:
     def create_packet(rec: str):
@@ -16,6 +16,8 @@ class MAXPacketFactory:
             return MAXWakeUpPacket(rec)
         elif pkt_type == 0xF0:
             return MAXResetPacket(rec)
+        elif pkt_type == 0x50:
+            return MAXPushButtonPacket(rec)
         else:
             print("Unknown message type: {}".format(pkt_type))
             result = MAXPacket()
@@ -116,6 +118,32 @@ class MAXAckPacket(MAXPacket):
         return result
 
 
+class PushButtonState(Enum):
+    AUTO = 0
+    ECO = 1
+    UNKNOWN = 2
+
+
+class MAXPushButtonPacket(MAXPacket):
+    def __init__(self, rec: str):
+        self.from_received(rec)
+        if rec[26:27] == "0":
+            self.button_state = PushButtonState.ECO
+        elif rec[26:27] == "1":
+            self.button_state = PushButtonState.AUTO
+        else:
+            self.button_state = PushButtonState.UNKNOWN
+        if rec[23:24] == "5":
+            self.retransmit = 1
+        else:
+            self.retransmit = 0
+
+    def to_string(self):
+        result = "{}\nMAXPushButtonPacket: button_state={} retransmit={}".format(super().to_string(),
+                                                                                 self.button_state, self.retransmit)
+        return result
+
+
 class MAXWakeUpPacket(MAXPacket):
     def __init__(self, rec):
         super().__init__()