W5300 keep alive

Question

Hi, We use w5300 chip in our project and want to activate the keep alive time register, or the SEND_KEEP. In our system, settings register Sn_KPALVTR to 1 to activate sending keep alive packet once in 5sec. After the w5300 had TCP connection and it is in SOCK_ESTABLISHED mode, only after one packet is transmitted it activates the KA packets. It is not activating after receiving packets without sending. In your DS said that: “KA packet can be transmitted after Sn_SSR is changed to SOCK_ESTABLISHED and more than one time DATA packet transmitting or receiving.” Is it possible to active the w5300 to send KA packets after receiving data without sending? Thanks! Ronit

bangbh · Answer

Hi,Ronit. I’m peter employee of wiznet. Unfortunately, It’s impossible to send KA packets without tcp sending. Thanks.