Using Arduino Mega as I/O expander

Hello,

I'm wondering about using Arduino Mega as I/O expander for my Netduino Plus. Has someone tried to connect this two boards to achieve similar scenario?  I know that I can use various of ways to expand Netduino I/O ports but most of them require board making and soldering and I don't have skills for that and my free time is very limited. Arduino Mega on the other hand has 54 I/O ports which is great and clean solution for me.

Regards

yes you can do that. spi, i2c and serial are possible ways todo so.

yes i allready connected netduino with arduino, i used the arduino as "graphiccard" -

and in anohter test as webserver. io is also possible, i used serial for communications, but spi

would be way fast.

Thanks for response. Any chance for some example code or some place where I should look for integration code?

Regards

well, fist you have to get familiar with some arduino libs, like hardwasre serial and the pin functions (if you wanna more, than more ^^)

its very very simple: you open a serial connection on both, ar- and net- duino.

from the netduino you send like: byte1(identifier - like this byte means pin on off swichting) byte2(wich pin) byte3(value on/off / 0/1)

so you send like 0x07 0x01 0x00

on the arduino side you read the serial data, and process it. if(firstbyteReceieved == 0x07) { (look_at_second_byte) { turn_on_or_of_depending_on_thrid_byte } }

Wouldn't it be easier to use SerialPort connection?

that was a sample, and it works for serial, spi, and ic2.

i myself use serialport.