Two Arduino's, one LCD & one motor shield for FireBot

Projects General Guidance
1

Hi,

Quick question about how to hook up 2x Arduino's. The first has a Sainsmart LCD keypad shield, with adjustments made to its pin code, now with working "hello world" output. I will be loading it with SerialDisplay sketch. I want Arduino1 to give me the output of Arduino2 serial which will have a motor shield on it to automate a patroling bot.

The idea is Arduino1 (currently com4 via USB) reports what Arduino2(currently com3 via USB) is saying, while the FireBot carrying both autonomously drives around on patrol. This will most likely be a mini (big enough to hold controlled can of compressed air) firefighting (candle sized) bot for a Battalion Chief I know.

I will be programming the Arduino2 bot to report on the status if it is at full speed, slowing down due to obstacles ahead, or if its sensor reports a flame. Each sub routine will have a display message with something like " Backing Up ", "Code 3" (with siren & flashing LCDs),"slow down" or "Patrol",.

I have both Arduino's with working test code individually but I don't know which cabling (ICSP? Pin 0/1?) to use, for the First to see the Seconds port output.

I also realize, that the Uno Firebot controller will most likely be upgraded to a Mega before this is over. But, I need to start some place, and getting the second uno to read the first uno is it.

Best,

Jack

2

I am not sure what you are asking. If it is for one arduino to communicate with a second arduino, check
http://www.instructables.com/id/EC81OWMHK482OMF/ Test: arduino to arduino serial using softwareSerial library

3

Thank you for replying, I obviously included to much details to start. Sorry. I am trying to have the LCD on Ard1 display what is being displayed on the serial port of Ard2. Basically a dumb terminal of what is being processed on Ard2.

4

No problem. It sounds like the link I suggested above may be of help.