rf.py

#!/usr/bin/env python

# Minimal example to peform a single tag inventory. Shows examples of serial or TCP/IP
# communication with a reader.
#
# For readers that support RSSI values returned with the tags (e.g. fixed reader series or UHF
# modules), comment out the get_inventory_uhfreader18 command and G2InventoryResponseFrame18
# format, and instead use the lines immediately preceding them (get_inventory_288 and
# G2InventoryResponseFrame288)

from chafon_rfid.base import CommandRunner, ReaderCommand, ReaderInfoFrame
from chafon_rfid.command import CF_GET_READER_INFO, G2_TAG_INVENTORY
from chafon_rfid.response import G2_TAG_INVENTORY_STATUS_MORE_FRAMES
from chafon_rfid.transport import TcpTransport, MockTransport
from chafon_rfid.transport_serial import SerialTransport
from chafon_rfid.uhfreader18 import G2InventoryResponseFrame as G2InventoryResponseFrame18
from chafon_rfid.uhfreader288m import G2InventoryCommand, G2InventoryResponseFrame as G2InventoryResponseFrame288

get_reader_info = ReaderCommand(CF_GET_READER_INFO)
get_inventory_288 = G2InventoryCommand(q_value=4, antenna=0x80)
get_inventory_uhfreader18 = ReaderCommand(G2_TAG_INVENTORY)

transport = SerialTransport(device='COM3')
#transport = TcpTransport(reader_addr='192.168.0.250', reader_port=27011)
#transport = TcpTransport(reader_addr='192.168.1.190', reader_port=6000)
runner = CommandRunner(transport)

#transport.write(get_inventory_288.serialize())
transport.write(get_inventory_uhfreader18.serialize())
inventory_status = None
while inventory_status is None or inventory_status == G2_TAG_INVENTORY_STATUS_MORE_FRAMES:
    #g2_response = G2InventoryResponseFrame288(transport.read_frame())
    g2_response = G2InventoryResponseFrame18(transport.read_frame())
    inventory_status = g2_response.result_status
    print(f"inventory status = {inventory_status}")
    for tag in g2_response.get_tag():
        print('Antenna %d: EPC %s, RSSI %s' % (tag.antenna_num, tag.epc.hex(), tag.rssi))

transport.close()