PWM communication

Development Boards Arduino
1

I’ve got 2 arduino’s and I don’t have any serial ports to use, figured I could use an analog-out and analog-in to communicate between the two. The sampling rate on the analog-in is too fast to grab the average voltage instead it grabs the instantaneous voltage and that’s really screwin up the reading. I’m getting a 1023 or 0. It’s important that each processor be code light (why i’m using two in the first place).

So how can I create a more steady voltage on that node? I’ve tried a capacitor to remove the AC but there wasn’t any effect.

thanks

2

You can probably switch off ADC and convert this pins to digital ones.

3

Can you use NewSoftSerial?

Can you use (hardware) SPI?

If not, then how about creating a bit-bang SPI (Two lines) if you don’t have access to the hardware SPI. Aka, [ ShiftOut() ] I think you would have to write your own [ ShiftIn() ].