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[on:]

I have an Arduino 2560 with a series of sensors.
I want to transmit the values of these sensors
via a rf module ( APC220 ), at approximately
every 10 seconds. I have written a function to do this
when called. I want to use timer 4 to call this function.
The more I search  on the web, the more confused I get.
The timer2 library makes it easy but seems only for timer 2
which as I understand the example, does not extend
to near enough time. Is there a generic timer library
which allows you to use any timer? I looked at the code for timer2
and this is way past my meager knowledge. I would such a library
would be useful to many.
Jim

[Reply #1 on:]

This code sends the value of 4 sensors every 10 seconds

Code:

unsigned long lastTime = 0;

void setup()
{
  Serial.begin(115200);
  Serial.println("Start...");
}

void loop()
{
  if (millis() - lastTime > 10000UL)  // UL means unsigned long
  {
    lastTime += 10000UL;

    float sensor1 = readSensor1();
    float sensor2 = readSensor2();
    float sensor3 = readSensor3();
    float sensor4 = readSensor4();

    Serial.println(sensor1);
    Serial.println(sensor2);
    Serial.println(sensor3);
    Serial.println(sensor4);

    SendRF(sensor1);
    SendRF(sensor2);
    SendRF(sensor3);
    SendRF(sensor4);
  }

  // here you can do something else in theory
}

void SendRF(float value)
{
  // no idea how :)
}

float readSensor1()
{
  // you know this too
}