EnviroDIY

2019-06-10 at 6:01 PM #12924

Moderator

Here’s some sample code that I just put together to demonstrate the code for waking and sleeping the Xbee. You’ll notice it’s a little more complicated than just setting the D23 pin high or low. That’s because the pin should be pulled high when you want to sleep the Xbee (like I mentioned in my previous post), and if you want to sleep the Mayfly (Mayfly sleep function not shown in the code below), you’ll want to enable the input pullup so the Mayfly pin still looks high to the Xbee unit, otherwise when the Mayfly sleeps, the Xbee won’t get the HIGH signal needed to keep it asleep and will therefore wake up.

It’s also a good idea to leave a few seconds before and after your payload transmission to give the Xbee network adequate time to do the behind-the-scenes payload transmission stuff.

#define XBEE_SleepPin 23

void setup() 
{
  //Initialise the serial connection
  Serial.begin(57600);
  Serial1.begin(9600);  //this is the Xbee UART, default Xbee speed is 9600 baud
  pinMode(8, OUTPUT);   //Green LED
  pinMode(9, OUTPUT);   //Red LED
  digitalWrite(8, HIGH);   //turn on the Green LED and leave it on
  digitalWrite(9, LOW);    //turn off the Red LED, we'll use it later to indicate Xbee wake
  pinMode(XBEE_SleepPin,OUTPUT);   // Set the Xbee "wake-up pin" (D23) to output
  digitalWrite(XBEE_SleepPin,LOW); // wake-up XBee to start with
  Serial.println("Xbee Testing Sketch"); 
  delay(2000);
}

void loop(){
     wakeXbee();
     delay(3000);   //give the Xbee a few seconds to wake up and be seen by the network
     Serial1.println("This_is_the_xbee_payload");    //this is the text that gets sent via the Xbee RF module
     delay(3000);   //give the Xbee a few seconds before putting it back to sleep
     sleepXbee();

     delay(10000);  // wait 10 seconds, then do it all over again
}


void sleepXbee(){
  Serial.println("Putting the Xbee to sleep");  
  delay(100);
  pinMode(XBEE_SleepPin,INPUT_PULLUP);  // Set the "wake-up pin" to input and enable the internal pullup
  digitalWrite(XBEE_SleepPin,HIGH);    //put the Xbee to sleep
  digitalWrite(9, LOW);   //turn off the RED LED when the Xbee is asleep
}

void wakeXbee() {
  Serial.println("Wake up the Xbee");
  delay(100);
  pinMode(XBEE_SleepPin,OUTPUT);   // Set the "wake-up pin" to output
  digitalWrite(XBEE_SleepPin,LOW); // wake-up XBee
  digitalWrite(9, HIGH);  //  turn on the RED LED when the Xbee is awake
}

#define XBEE_SleepPin 23

void setup()

{

//Initialise the serial connection

Serial.begin(57600);

Serial1.begin(9600); //this is the Xbee UART, default Xbee speed is 9600 baud

pinMode(8, OUTPUT); //Green LED

pinMode(9, OUTPUT); //Red LED

digitalWrite(8, HIGH); //turn on the Green LED and leave it on

digitalWrite(9, LOW); //turn off the Red LED, we'll use it later to indicate Xbee wake

pinMode(XBEE_SleepPin,OUTPUT); // Set the Xbee "wake-up pin" (D23) to output

digitalWrite(XBEE_SleepPin,LOW); // wake-up XBee to start with

Serial.println("Xbee Testing Sketch");

delay(2000);

}

void loop(){

wakeXbee();

delay(3000); //give the Xbee a few seconds to wake up and be seen by the network

Serial1.println("This_is_the_xbee_payload"); //this is the text that gets sent via the Xbee RF module

delay(3000); //give the Xbee a few seconds before putting it back to sleep

sleepXbee();

delay(10000); // wait 10 seconds, then do it all over again

}

void sleepXbee(){

Serial.println("Putting the Xbee to sleep");

delay(100);

pinMode(XBEE_SleepPin,INPUT_PULLUP); // Set the "wake-up pin" to input and enable the internal pullup

digitalWrite(XBEE_SleepPin,HIGH); //put the Xbee to sleep

digitalWrite(9, LOW); //turn off the RED LED when the Xbee is asleep

}

void wakeXbee() {

Serial.println("Wake up the Xbee");

delay(100);

pinMode(XBEE_SleepPin,OUTPUT); // Set the "wake-up pin" to output

digitalWrite(XBEE_SleepPin,LOW); // wake-up XBee

digitalWrite(9, HIGH); // turn on the RED LED when the Xbee is awake

}