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Allows for the renewal of DHCP leases. When assigned an IP address via DHCP, ethernet devices are given a lease on the address for an amount of time. With Ethernet.maintain(), it is possible to request a renewal from the DHCP server. Depending on the server's configuration, you may receive the same address, a new one, or none at all.
Ethernet.maintain() was added to Arduino 1.0.1.
Ethernet.maintain();
none
byte:
0: nothing happened
1: renew failed
2: renew success
3: rebind fail
4: rebind success
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