First commit

python-ax25/examples/readAPRS.py

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+#!/usr/bin/python3
+
+import pythonax25
+
+def parsePacket(string):
+	# Split the address and payload separated by APRS PID
+	buffer = string.split(b'\x03\xf0')
+	address = buffer[0]
+
+	# Check if the first byte indicates it is a data packet
+	if address[0] is 0:
+		# Cut the first byte and feed it to the address parser
+		listAddress = getAllAddress(address[1:])
+
+		# Get the source, destination, and digipeaters from the address list
+		source = listAddress[1]
+		destination = listAddress[0]
+		digipeaters = listAddress[2:]
+	else:
+		raise Exception('Not a data packet')
+
+	payload = buffer[1]
+	return (source, destination, digipeaters, payload)
+
+def getAllAddress(packetAddress):
+	addressSize = 7
+	# Check if the networked address string is valid
+	if (len(packetAddress) % 7) is 0:
+		# Create a list of all address in ASCII form
+		allAddress = [pythonax25.network_to_ascii(packetAddress[i:i+addressSize])
+            for i in range(0, len(packetAddress), addressSize)]
+		return allAddress
+	else:
+		raise Exception('Error: Address is not a multiple of 7')
+
+def main():
+    # Check if there's any active AX25 port
+    if pythonax25.config_load_ports() > 0:
+        # Get the device name of the first port
+        axport = pythonax25.config_get_first_port()
+        axdevice = pythonax25.config_get_device(axport)
+        axaddress = pythonax25.config_get_address(axport)
+    else:
+        exit(0)
+
+    # Initiate a PF_PACKET socket
+    socket = pythonax25.packet_socket()
+
+    while True:
+        # Blocking receive packet, 10 ms timeout
+        receive = pythonax25.packet_rx(socket,10)
+        if receive[0][1] == axdevice:
+            print(receive)
+            source, destination, digipeaters, payload = parsePacket(receive[1])
+            print("Packet Received by = %s"%axaddress)
+            print("Source Address = %s"%source)
+            print("Destination Address = %s"%destination)
+            print("Digipeaters =")
+            print(digipeaters)
+            print("Payload = %s"%payload)
+            print("")
+        else:
+            continue
+
+main()