Added time() and sleep() functions

[OrganicIrradiation]

From the documentation: "This command sets the real-time clock by
synchronizing with the time server specified with the time server (set
time) parameters. This command sends a UDP time server request packet."

Also added sleep() function per mgrey's recommendations: #9

[quique123]

Hi guys! Just wanted to clear something up. Does the wifi module/shield have an rtc? But it is not battery powered like a DS1307 or DS3231? So it only keeps time while the unit has power, correct? I have a project that uses an external ds1307 breakout to keep time and together with timealarms library, I call measurements every 30 minutes. I wanted to eliminate the external ds1307 breakout and see if I could keep the alarm-measurement functionality using the wifi module's rtc. But I guess that if the wifi module reboots, which it sometimes does, it would loose its time? But it would sync again on setup, right?

[OrganicIrradiation]

If my memory serves me correct, the module does not have a battery backup, so the time would be lost if power is lost (until a time resync is performed). I'm honestly not sure what the status of the WiFly's RTC would be after a soft reboot.

[quique123]

Oh ok but it does have a clock? And on reboot I could probably call a function to sync the clock again. Who knows. Do you know of any examples using the rtc functions?

MV

On Nov 13, 2015, at 6:23 PM, OrganicIrradiation [email protected] wrote:

If my memory serves me correct, the module does not have a battery backup, so the time would be lost if power is lost (until a time resync is performed). I'm honestly not sure what the status of the WiFly's RTC would be after a reboot.

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[OrganicIrradiation]

Yes, it does have an RTC (see section 3.11 in the command reference). And yes, you can call the time() function that was added in this to commit to re-sync. Here's some old code that (I believe) should work:

WiFly.setTimeAddress("129.6.15.30"); // time-c.nist.gov
WiFly.setTimePort(123);
WiFly.setTimezone(22);  // CEST UTC + 2 hours
WiFly.setTimeEnable(5);
WiFly.time();

const byte bufferSize = 32;
char buf[bufferSize];
WiFly.getTime(buf, sizeof(buf));

[quique123]

Thanks. I was trying a slightly different code and it didnt work. The 2 main differences are the setTimeEnable which I had at 1 and you have at 5, and the ntp which I had at ...28 and you have at ...30. Im guessing it might have had to do with the setEnableTime? What does 5 do vs 1? Here is my code:

char dataBufferToReceive[bufferSize]; //for the time
long int uptime;
char timezone;
long int rtc;
wifiSerial.begin(9600);
// set time from ntp
wifly.setTimeAddress("129.6.15.30");******************_// I was using .28
wifly.setTimePort(123);
wifly.setTimezone(7);
wifly.setTimeEnable(5); //_*******************Is this why?
wifly.time();
wifly.save();
delay(1000);
uptime = wifly.getUptime();
timezone = wifly.getTimezone();
rtc = wifly.getRTC();

Serial.print("uptime: ");
Serial.println(uptime);
Serial.print("timezone: ");
Serial.println(timezone);
Serial.print("rtc: ");
Serial.println(rtc);
Serial.print("MyTime from wifly getTime: ");
Serial.println(MyTime);

//Get time from wifi module
if (wifly.time()) { // My testing of rtc
//print time
delay(1000); // My testing of rtc below
char *something = wifly.getTime(dataBufferToReceive,sizeof(dataBufferToReceive));
int something = wifly.getRTC();
Serial.print("RTC from wifly getRTC: ");
Serial.println(something);
} else {
Serial.println("Failed to get time");
}

[OrganicIrradiation]

In the section (3.11) of the datasheet I mentioned above, they explain the value for set time enable:

The RN module can also be configured to get the time whenever it powers up using the
set time enable 1 command. If time enable is set to a value greater than ‘1’, the RN
module pulls the time continuously every <value> minutes.

So, wifly.setTimeEnable(5); will update the time every 5 minutes while wifly.setTimeEnable(1); will only update the module's RTC on startup. You can also see section 4.3.11 for other "set time" feature descriptions.

[quique123]

Yeah I read that section. So that wouldn't have been the issue. Anyway, thanks because with your code it worked.

MV

On Nov 17, 2015, at 12:09 AM, OrganicIrradiation [email protected] wrote:

In the section (3.11) of the datasheet I mentioned above, they explain the value for set time enable:

The RN module can also be configured to get the time whenever it powers up using the
set time enable 1 command. If time enable is set to a value greater than ‘1’, the RN
module pulls the time continuously every minutes.

So, wifly.setTimeEnable(5); will update the time every 5 minutes while wifly.setTimeEnable(5); will only update the module's time on startup. You can also see section 4.3.11 for other "set time" feature descriptions.

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