Using an Operator Interface with the 2004 EDU RC wirelessly

[Guilherme]

I´ve tried to connect the edu´s, but I had some problems.

I downloaded the program into 2003 EDU and into 2004 EDU with total sucess.

After that, I tested the communication sending pwm_03 = 250 , and engaging a servo motor into pwm03, in the 2004 EDU RC. It moved. So I tried pwm_03=127 and the servo stopped. Great, it worked.

Now, we tried to turn on the 2003 Operator Interface, in order to send Joystick data to the 2004 EDU controller (note: using 2003 radio modens). But for some reason it went crazy, and the servos didn´t respond to the joystick, they just start running at top speed, without stopping.

We plugged both RC in a main power source with 7,2 V, so it should power then at the same time.

We are trying to use TTL communication using Parallax RF modules, did anyone try to use something like this? What about the 3 pins for TTL communications, I read that there´s no custom code in the default program for it, is that true?

We have a lot of thing in mind such as: pluging joysticks in parallax boards of education. After that we plug one RF transmitter, and we use another Parallax board to receive the signal. Finally, we program the receiver board to convert the signal (in value) to PWM signal (used in the 2004 RC). This is a little harder, but it works in theory.