Trying to learn the webiopi and python. I have a simple button to turn off and on a relay. Here is the HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>WebIOPi | Example App</title>
<script type="text/javascript" src="/webiopi.js"></script>
<script type="text/javascript">
webiopi().ready(function() {
// Create a "Light" labeled button for GPIO 17
var light_button = webiopi().createGPIOButton(17, "Light", function() {
// Call the logtofile macro
webiopi().callMacro("logtofile", [], '');
});
// Append buttons to HTML element with ID="controls" using jQuery
$("#controls").append(light_button);
// Refresh GPIO buttons
// pass true to refresh repeatedly of false to refresh once
webiopi().refreshGPIO(true);
});
</script>
<style type="text/css">
button {
display: block;
margin: 5px 5px 5px 5px;
width: 160px;
height: 45px;
font-size: 24pt;
font-weight: bold;
color: white;
}
#gpio17.LOW {
background-color: Black;
}
#gpio17.HIGH {
background-color: Blue;
}
</style>
</head>
<body>
<div id="controls" align="center"></div>
</div>
</body>
</html>
Straight forward stuff you will find in the tutorials around the web. I added this
// Call the logtofile macro
webiopi().callMacro("logtofile", [], '');
To call a macro. My script file looks like this
import webiopi
GPIO = webiopi.GPIO
BLUE = 17 # GPIO pin using BCM numbering(BOARD 11)
RED = 18 # GPIO pin using BCM numbering(BOARD 12)
GREEN = 27 # GPIO pin using BCM numbering(BOARD 13)
# setup function is automatically called at WebIOPi startup
def setup():
# set the GPIO used by the light to output
GPIO.setFunction(BLUE, GPIO.OUT)
GPIO.setFunction(RED, GPIO.OUT)
GPIO.setFunction(GREEN, GPIO.OUT)
# loop function is repeatedly called by WebIOPi
def loop():
# gives CPU some time before looping again
webiopi.sleep(1)
# destroy function is called at WebIOPi shutdown
def destroy():
GPIO.digitalWrite(BLUE, GPIO.LOW)
@webiopi.macro
def logtofile():
call([" sudo python /home/pi/buttonlog.py "], shell=False)
My logtofile macro is just calling the /home/pi/buttonlog.py that looks like this.
import datetime
i = datetime.datetime.now()
#OPEN FILE & APPEND
f=open('/home/pi/buttonlog.txt','a')
#WRITE DATE THEN NEW LINE WITH THE '\N'
f.write(i.isoformat() + '\n')
Straight forward code that writes the date to the /home/pi/buttonlog.txt However when I click the button I do not get the script to add the date to the file. If I run the buttonlog.py all by itself it writes to the file as expected. Am I missing something? I know this is probably not the simplest way to accomplish this but I am trying to understand how it works.
