Ethernet interface for Particle using W5500 User Library Complete

[MisterNetwork]

Perhaps @Maddy5075 might be able to assist as it seems he is working on something similar.

Particle Photon like product using STM32F207’s ethernet,cloud handshake error -19

The custom (Photon like, STM32F207 Ethernet, instead of Wifi) device acquires dynamic IP, resolves dns of device.spark.io, creates a spark socket and connects to it, able to receive nonce of 40 bytes, but couldn’t receive key and fails with an error code of -19. Also unable to use Particle CLI since it says dfu device not found. But the boot loader dfu works with ID’s 0x483:DF11 (It’s a Nucleo STM32F207 Kit) and also able to dfu the cloud_public.der at the location 2082/34. Need help to resolve…