b.Hello:
:999<c/r>
The ‘hello’ command is like a ‘who is alive?’ question.
This is useful in order to detect which addresses exist in the system. Each existing board, whether active or not, responds ‘*x<c/r>’, where x is its address.
Notes
1.Wait 10 ms after sending the colon (‘:’) before sending the rest of the command (‘999<c/r>’).
2.The ‘*x<c/r>’ responses will be transmitted in sequence. That is, if all 64 addresses exist, then first ‘*1<c/r>’ will be transmitted, then ‘*2<c/r>’ and so on, and finally ‘*64<c/r>’.
3.The ‘hello’ command does not change the ‘active’ mode of the address – it will remain the same as before.
4.After sending the ‘hello’ command, wait 1 second to give chance to all 64 potential addresses to respond.
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