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def modbus_crc16(data: bytearray) -> bytearray:
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crc = 0xFFFF
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for byte in data:
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crc ^= byte
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for _ in range(8):
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if crc & 0x0001:
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crc = (crc >> 1) ^ 0xA001
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else:
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crc >>= 1
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return bytearray([crc >> 8,crc & 0xFF]) |
