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rfid_controller.py
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rfid_controller.py
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import mercury
import logging
from sys import stdout
from time import sleep
from multiprocessing import Process, Queue, get_logger
logger = get_logger()
logger.setLevel(logging.INFO)
handler = logging.StreamHandler(stdout)
handler.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
def read_tags_worker(queue_of_tags: Queue):
"""
"""
reader = mercury.Reader("tmr:///dev/ttyS4", baudrate=115200)
reader.set_region("NA2")
reader.set_read_plan([1], "GEN2", read_power=500)
try:
logger.info("Read Worker is Attempting to read")
while True:
try:
tags = reader.read(timeout=250)
except RuntimeError:
pass
if len(tags) != 0:
for tag in tags:
queue_of_tags.put(tag.epc)
sleep(.25)
except KeyboardInterrupt:
logger.info("keyboard interrupt in Read Worker")
finally:
logger.info("Read Worker done reading")
reader.stop_reading()
queue_of_tags.close()
def main():
tags_queue = Queue()
unique_tags = set()
reader_worker = Process(target=read_tags_worker, args=(tags_queue,))
logger.info("Starting Read Worker")
reader_worker.start()
try:
while True:
item = tags_queue.get()
if item is None:
break
unique_tags.add(item)
except KeyboardInterrupt:
logger.info("Keyboard Interupt in Main Thread")
logger.info("Joining Read Worker")
reader_worker.join()
logger.info("Emptying Queue")
while tags_queue.full():
item = tags_queue.get()
if item is None:
break
unique_tags.add(item)
finally:
print(unique_tags)
print(len(unique_tags))
logger.info("Main Thread exiting")
for handler in logger.handlers:
handler.close()
logger.removeFilter(handler)
if __name__ == "__main__":
main()