import time

# ascii version of a test message
message = 'DA0400010201000100000000000000004B02AA2B00'
         # VVCCCLLLVIVMSSSSIIIIIIIIIIIIIIIITTTTTTTTPPAAAAAAAA
         # 01234567890123456789012345678901234567890123456789
         # *         *         *         *         *

# grab each part of the header
version = message[0:2]
control_bits = message[2:5]
payload_length = message[5:8]
vendor_id = message[8:10]
vendor_model = message[10:12]
sequence = message[12:16]
identifier = message[16:32]
timestamp = message[32:40]


# convert FROM ascii hex (base 16).
version = int(version, 16)

# need to deal with this a little diffrently due to 3bit integers.
control_bits = int(control_bits, 16)
identifier_schema = (control_bits >> 5) & 0x7
authorisation_schema = (control_bits >> 2) & 0x7
acknowledge_required = (control_bits >> 1) & 0x1
response = control_bits & 0x1

payload_length = int(payload_length, 16)
vendor_id = int(vendor_id, 16)
vendor_model = int(vendor_model, 16)
sequence = int(sequence, 16)
identifier = int(identifier, 16)
timestamp = int(timestamp, 16)

print "---"
print "ascii hex message: %s" % message
print "---"
print "       version: 0x%X" % version
print "  control_bits..."
print "           identifier_schema: 0x%X" % identifier_schema
print "        authorisation_schema: 0x%X" % authorisation_schema
print "        acknowledge_required: 0x%X" % acknowledge_required
print "                    response: 0x%X" % response
print "payload_length: 0x%X" % payload_length
print "     vendor_id: 0x%X" % vendor_id
print "  vendor_model: 0x%X" % vendor_model
print "      sequence: 0x%X" % sequence
print "    identifier: %s" % identifier
print "     timestamp: %s" % time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(timestamp))