The FTDI Friend is a tweaked out FTDI FT232RL chip adapter. Sure, like the well-known FTDI cable, it can provide power to your project and there are 4 signal lines for sending data back and forth. But the Friend can do much more! For example, you can change the signal and power lines to be either 3.3V or 5V.
Arduino-derivatives and XBees use the RTS line for programming but what if you need that DTR line? It's there for you. By default, we've set it up so that it matches our FTDI cables. The 6th pin is RTS (as of Arduino IDE v18 this will work perfectly for uploading to 'inos), the power wire is +5V and the signal levels are 3.3V (they are 5V compliant, and should work in the vast majority of 3.3V and 5V signal systems).
And of course, we include a little extra - in this case its the extra-long headers that you can use to plug it into a breadboard, or a 6-pin extension cable (which will also let you rearrange the wire order). There are also blinkies, 2 red & green LEDs that pulse when serial is sent or received.
In a pinch, you can even use it to program AVRs (it's a bit slow but works!).
Arduino-derivatives and XBees use the RTS line for programming but what if you need that DTR line? It's there for you. By default, we've set it up so that it matches our FTDI cables. The 6th pin is RTS (as of Arduino IDE v18 this will work perfectly for uploading to 'inos), the power wire is +5V and the signal levels are 3.3V (they are 5V compliant, and should work in the vast majority of 3.3V and 5V signal systems).
And of course, we include a little extra - in this case its the extra-long headers that you can use to plug it into a breadboard, or a 6-pin extension cable (which will also let you rearrange the wire order). There are also blinkies, 2 red & green LEDs that pulse when serial is sent or received.
In a pinch, you can even use it to program AVRs (it's a bit slow but works!).
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