libmodbus

Broadcast address

Asked by David Olivari

Why does MODBUS_BROADCAST_ADDRESS is defined as 255 and not 0 ?
Thank you

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Stéphane Raimbault (sra) said : 		#1

For network 192.168.1.0, the broadcast is 192.168.1.255, it's just the TCP/IP rule!

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David Olivari (david-olivari) said : 		#2

Ok for IP I understand that but on serial bus 255 address is not allowed

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Stéphane Raimbault (sra) said : 		#3

You're right! I've changed the definition to 0 (page 23 of Modbus_Messaging_Implementation_Guide_V1_0b)

http://github.com/stephane/libmodbus/commit/daa6d20894b524b84bf01c7100f09744802ad8f2

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