PS-IN202 Product Manual: http://i.sears.com/s/d/pdf/mp-tc/12855/prod_5432596622 9600 @ 8-None-1 Demand mode, have to press the PRINT button on scale, so not for us that I can tell GROSS 185.6 kg TARE 50.6 kg NET 135.0 kg continuous mode spits out a new memsurememnt about every 0.5 seconds..:  0.0 kgG  0.0 kgG  0.0 kgG  0.0 kgG  0.0 kgG  44.2 kgG  44.2 kgG  58.0 kgGM  117.2 kgGM  133.0 kgGM  136.2 kgGM  140.4 kgGM  141.4 kgGM  141.6 kgG  141.6 kgG  141.6 kgG  141.6 kgG  142.2 kgGM  139.8 kgGM  126.4 kgGM  99.6 kgGM  56.6 kgGM  44.2 kgGM  44.2 kgGM  44.2 kgG  44.2 kgG  44.2 kgG  44.2 kgG  44.2 kgG  44.2 kgG  44.2 kgG with Tare set.. and me stepping onto scale  0.0 kgN T  0.0 kgN T  0.0 kgN T  1.8 kgNMT  84.6 kgNMT  89.2 kgNMT  94.6 kgNMT  98.8 kgNMT  96.2 kgNMT  97.2 kgNMT  97.0 kgNMT  97.4 kgNMT  98.8 kgNMT  96.8 kgNMT  97.4 kgNMT  92.8 kgNMT  81.2 kgNMT  42.8 kgNMT  1.2 kgNMT  0.0 kgNMT  0.0 kgNMT The M is for movement, so the display should say 'stable' when no M is present The T is for Tare, so maybe have a T or the word Tare show up. G is for Gross weight, N is for Net, I don't thing these need anything The above also has a extended ascii character 191 (upper right corner) that does not show up in notepad, but shows up in notepad++ as a 'STX' Here is a videio showing the factory setup and use of their custom software.. Prime Scales Prime Interface Software Setup https://www.youtube.com/watch?v=u_5gy7gXuYw using the other serial ports and assigning to differrent GPIO pins https://www.youtube.com/watch?v=GwShqW39jlE RS232 To TTL Converter Module Serial Module DB9 Connector 3.3V uses a MAX3232 https://www.ebay.com/itm/153491168439