User's Manual

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4.4 Automatic addressing
The device provides automatic addressing for boards connected together in the chain.
The procedure requires modified tags with information containing the address and RS485 line termination
information.
It’s recommended to enable termination on the last reader in the chain.
The procedure is as below:
1. At power up, the Reader discovers nearby tags.
2. The Reader should read (header size) bytes from each discovered tag until it finds an address tag. Verify
the header CRC.
3. If any address tags are discovered containing valid configuration data (address and termination) in its
payload, the Reader will store that configuration in NVM (non-volatile memory) and blink the status LED
green.
4. If after 2 seconds no nearby address tags containing valid configuration payloads are discovered, load
configuration data from non-volatile memory (NVM) if such data exists, and blink the LED white.
5. If no configuration data exists in NVM, The Reader will load the default configuration (address: 0x80,
termination: ON) and blink the LED red.