W5500 for sale

I have put the PCB and assembled board to store section on right. It offers all the function as W550io:

• Size 2.5 x 5 cm.
• Require 3.3V.
• 80Mhz SPI.
• RJ45 jacks with integrated magnetics.
• ACT and LINK LEDs.

Choose PCB only or fully assembled version.
Standard 0.1" pin header with GND, 3V3, SS, SCK, MISO, MOSI, RST, INT pins.
Schematics are added for download.

W5500 test PCB progress

PCB arrived on Monday and Tuesday I put it together. Say it short, it works. Happy again, I can continue with testing of new gateway. The differential pairs design worked, and the 33R dumping resistors are not required. Moving 3V3 power line out of RX and TX pairs probably also. Results is having a nice 2,5x5 cm breadboard friendly W5500 board. I will put PCB and finished version also to BUY section on right side. Maybe someone is interested.

W5500 test PCB

As gateway board is having issue with Ethernet crosstalk, I have created small 2.5 x 5 cm breadboard friendly PCB. I will use it to verify my new component arrangement and not spending another 50 USD on full gateway boards. I used differential trace length and moved the 3V3 power line away form TX/RX pairs. Also I have removed 33R dumping resistors from design as I have not found them anywhere else nor even or W550io from WizNet.

PCB is here

New PCB version 1.6. is here, and I have started to put all components on it. All I had at home already is there and it is good so far. New switching power supply is delivering right around 4V required for SIM900. GSM module is starting up and when I put SIM in the socket it registers automatically to home network. W5500 also lights up the ACT and LINK leds when Ethernet cable is plugged it. I have to wait mainly for the UART multiplexer/demultiplexer to really start the tests. Waiting for you Mr. Postman :).