Let's Make Robots!

How to be very happy when communicating serial wireless low tech

Updated with Bonus tip! You can "easily" hook up some cheap UHF / FM whatever units to make 2 MCU's talk wireless by serial. But you need to learn some stuff, this is what I learned :)

Since I discovered this:


all has changed! I was blind, but now I can see. And I can program!

On Picaxe, in order to send with these modules, use this code:

for b0 = 0 to 255
high 3 pause 3 low 3 pause 1 serout 3,N2400, (85, 85, b0)
pause 200
next b0
goto testsender

and to recieve, use this code:

serin 7, N2400, (85,85), b0
sound 0, (b0,10) low 0
goto testreciever

- Of course adapted to your own setup etc.

The important parts here are:

high 3 pause  3 low 3 pause 1 serout 3,N2400, (85,85...


serin 7, N2400, (85,85...

Because with that combination all together, the reciever is left most happy in all states, and the result is 100% rock steady. Like in not a single bit lost in a thousand!


Bonus tip:

A) Hook up a speaker to your MCU

B) Send sound to it in a loop

C) Take off the speaker, and hook up the sender

D) Power up the reciever, and on the out-pin, hook up the speaker (and other wire to ground on the reciever)

Now do you hear sound from the reciever, punk? If not, you can rest assured that your recieving MCU will not get any signal either :)

Yes, you can start your own little radio station with these ;)


(Note that this post has changed, some of the comments below may be from earlier)

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It's your way of describing the tech stuff that obviously is just outside your grasp. I love to see you learn and teach at the same time.

More people should do that. Better than pirated brain upgrades.

This is all clearly inside my grasp! I am totally down with robots, chips and stuff! I repell your attack!

I said "just", didn't I?

Seriously: I like the howto. For all of it: language, recognizing the learning curve, the teaching AND the cool KISSS. (The extra S is for serial, put it where ever).

(you said "outside" :)

And even then, I would hesitate to make us all alike in here. We should be proud of our diversity. (And I know we are proud.)

I blame TV for my English education. And the spell checker in Firefox you pointed out to us.