I can't seem to find an example project that sends serial data out of d1/tx. Everything I have seen sends the serial data through the USB. My goal is to press a button attached to pin a0, and send a serial command out of tx to another piece of hardware (not USB to a computer). Also, I planned to use half of a w1-Wire to connect to the Arduino, cut the wires, and connect the raw wires to my external hardware that reads the serial data. So here are my questions:Can I send serial data out this way?What would the 3 wire pinout be?Thanks for any guidance you can give me!

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Hi Geof,Grateful for the explanation as it clears up some questions I had.The example uses two Arduino bits connected together. I am trying to work out, can the rx/tx on the arduino module be connected with serial with the various proto/perf/hdk options that there are now?

I thought I read somewhere about whatever the mechanism is to do the arduino serial that that isn't something possible with standard, vcc, sig, gnd which the hdk uses but i'm most likely wrong. I haven't really seen much at all about using that port for serial so any pointers would be appreciated.Thanks DanPowered by, best viewed with JavaScript enabled.

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Many USB serial ports do not support a 5 bits per byte configuration however when configuring a serial port under DOS it is fairly common practice to simply set the serial ports LCR register to 0x80 to set the DLAB bit before setting the LCR to the actually desired value. This patch is a hack to work around the problem with these adapters at the cost of disabling the 9600 baud 5.N,1 configuration.