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@willywg
Created Nov 24, 2013
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Ping Web. Connect Ruby with Arduino by Serial Port
require 'serialport'
require 'net/ping'
website = 'http://turismoi.pek'
#this *will* be different for you
#You need to find out what port your arduino is on
#and also what the corresponding file is on /dev
#You can do this by looking at the bottom right of the Arduino
#environment which tells you what the path.
port_file = '/dev/tty.usbmodem1411'
#this must be same as the baud rate set on the Arduino
#with Serial.begin
baud_rate = 9600
data_bits = 8
stop_bits = 1
parity = SerialPort::NONE
#create a SerialPort object using each of the bits of information
port = SerialPort.new(port_file, baud_rate, data_bits, stop_bits, parity)
wait_time = 4
#for an infinite amount of time
loop do
#lets us know that we've checked the unread messages
puts "Ping #{website}"
pingomatic = Net::Ping::HTTP.new(website)
unless pingomatic.ping?
port.write "b"
end
#wait before we make another request to the Gmail servers
sleep wait_time
end
void setup() {
Serial.begin(9600);
//Set pin 11 to be output pin (connect LED here)
pinMode(11, OUTPUT);
//set pin 11 to be high initially; LED is usually on, but, not blinking
digitalWrite(11, HIGH);
}
//this procedure is called if we need to blink the LED
void blink_led() {
//we can't just blink it once, because that wouldn't be noticeable
//so, we blink it three times
for(int i = 0; i<10; i++) {
digitalWrite(11, HIGH);
delay(100);
digitalWrite(11, LOW);
delay(100);
}
//reset the LED back to just on, not blinking
digitalWrite(11, HIGH);
}
//this function is called when we get a character
//over USB/Serial
void got_char(char x) {
//if we get b over Serial
if(x == 'b') {
//... blink the LED
blink_led();
}
}
void loop() {
//check if there's any data available on serial
if(Serial.available() > 0) {
//if there is, we read it
byte byte_read = Serial.read();
//and call "got_char"
got_char((char)byte_read);
}
}
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