Serial Sniffer - Part ONE

 

While I was waiting for the tariff things to settle out, I designed another PCB that I have always wanted, but could never find at reasonable price.  An RS-232 serial sniffer.  Now that USB is the standard, these dont really exist.  But for embedded, I still use serial to talk to the BT modules and as a logging port.  So this thing has two Serial to USB converters (FTDI based) and then two more Serial ports that are connected to a PIC processor.  The last two will be used to "sniff" a serial port under test.  Then the PIC will arrange the Tx and Rx data in time order and send either to a custom program or to something like TeraTerm.  It also has Mikroe Click port on it, so I can add other modules down the road.    Probably could have found something close, but this way I get exactly what I want.