I had this posted in the hardware>interfacing section, but I think it is more of a software issue…
I came across this Hobby Robotics » Cheap Arduino Wireless Communications and thought that it was an awesome idea.
I have been looking at this more however as he uses VirtualWire:
I plan to use the VirtualWire library www.open.com.au/mikem/arduino/VirtualWire.pdf.
And these transmitters and receivers:
I am having trouble understanding the example that comes with the library for both transmitter and receiver.
I wish to read a value from an analog input and then send it to the receiver where it will be used for a PWM output.
My transmitter code looks something like this:
int POTPIN = 0;
int POTVAL = 0;
byte PWMVAL = 0;
// int PWMOUT = 3;
Serial.begin(9600); // Debugging only
// Initialise the IO and ISR
vw_set_ptt_inverted(true); // Required for DR3100
vw_setup(2000); // Bits per sec
const char *msg;
POTVAL = analogRead(POTPIN); // read value from potentiometer
PWMVAL = map(POTVAL, 0, 1023, 0, 255); // map the value so that it can be used for PWM signal
msg = “PWMVAL”;
vw_send((uint8_t *)msg, strlen(msg));
vw_wait_tx(); // Wait until the whole message is gone
One of my problems is that I do not want to send characters and instead just one byte of the value from mapped analog value.
I am unsure of how to adapt the code for my project Sad
If anyone has any advice I would greatly appreciate it.
Thanks in advance.