Arduino constantly "screams" ARP broadcast
hi everyone, since bought me arduino 2560 w5100 ethernet-shield measure stuff home-automation, network has become totally laggy , unstable. i have used wireshark going on there , figured out arduino "yelling" arp 192.168.1.248 in fixed intervall. this device homematic-control-unit, provides connection server. when arduino disconnected network, devices answer pretty fast (<10ms) ping request. after powered, goes random devices not showing or answering after 200ms. in opinion broadcasts source of problem. the overall network contain 2 wifi-ap's, 2 switches , firewall , ton more of components. so question - since arduino gets ip dhcp reservation device a.m. ip (...248) - how can teach arduino mac-address of homematic-device or use arp-table. from other posts, have seen using arp-table might problem w5100 shield. any ideas how solve this? regards, maeffjus btw: here code use: (only first few lines should interesting problem, ccu homematic-device) code: [select] #