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Documented maximum observed delay for future reference.
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This commit is contained in:
Stefan Kratochwil
2025-01-28 19:24:31 +01:00
parent 836f9ec42b
commit f213a51e36
1 changed files with 9 additions and 1 deletions
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10
software/src/mfrc522/main.py
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@@ -35,6 +35,14 @@ def uid_to_string(uid: list):
async def get_tag_uid(reader: MFRC522, poll_interval_ms: int = 50) -> list: async def get_tag_uid(reader: MFRC522, poll_interval_ms: int = 50) -> list:
'''
The maximum measured delay with poll_interval_ms=50 and a reader with tocard_retries=5 is
15.9 ms:
delay (min / max / avg) [µs]: (360 / 15945 / 1.892923e-06)
The maximum measured delay dropped to 11.6 ms by setting tocard_retries=1:
delay (min / max / avg) [µs]: (368 / 11696 / 6.204211e-06)
'''
while True: while True:
reader.init() reader.init()
@@ -49,7 +57,7 @@ async def get_tag_uid(reader: MFRC522, poll_interval_ms: int = 50) -> list:
def main(): def main():
reader = MFRC522(spi_id=1, sck=10, miso=12, mosi=11, cs=13, rst=9, tocard_retries=5) reader = MFRC522(spi_id=1, sck=10, miso=12, mosi=11, cs=13, rst=9, tocard_retries=1)
print("") print("")
print("Please place card on reader") print("Please place card on reader")