Ethernet Shield W5100 does not connect to the Blynk server via Switch, only with router

[PeteKnight]

@Jurandir

Researching here on my problem, I came to suspect that the L2 switches do not work with the Ethernet Shield W5100 because of their characteristics of doing frame switching only via hardware, which happens differently in L3 type routers and switches, which in addition To do frame switching, can also do packet switching, and also via hardware.

I think you might be on to something there. My W5100 shield works okay when plugged-in to a Netgear GS605 or GS608 switch, which are described as “Layer 3 Light” - whatever that means, but doesn’t work when plugged-in to a D-Link DGS-102D switch which is Layer 2.

Pete.