Sunday, May 15, 2016

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 :).


  1. Nice project! Do you have any pictures showing it installed?

  2. Hello Dan,

    yes, I use it for over a year. I can, and I will post pictures of my setup. This new mainboard(GW), with all components is under testing now. I will post info this week, I have some problem with Ethernet crosstalk, but I'm still not sure where the bug is.