Data Logger Shield with Mega

[richardkhoo]

Hi,

May I know why I got port in used error after compliing the AdafruitMega.pde ?

Please advise. Thanks

[adafruit_support_bill]

Some program is either actively using the port or has neglected to close it. Sometimes it is the Bluetooth stack hogging the ports. But the Arduino IDE itself (actually the Java runtime) does have a bad habit of hanging up the ports too. This often happens if you hit the upload button when an upload is already in process.

From my experience, when this happens you have to close all instances of the IDE, then locate the Java runtime (javaw.exe) process with TaskManager and kill that. Then you can regain use of the port. Depending on how many other things you have going on, it is often simpler just to restart the machine.

[richardkhoo]

Thanks. It was easy, I just had to reboot my machine.

Next issue: how do I know if the data logger shield is working correctly? I don't see the green LED lights up when I inserted the battery. How do I troubleshoot it?

I tried to do the example of RCTlib and I got this reply in serial monitor. Is the data logger shield working correctly?

[adafruit_support_bill]

The LEDs are configurable and won't light up unless you have wired and programmed them to do something. Your RTC output doesn't look quite right. If you post clear photos of the front and back of the board we'll check your assembly.

[richardkhoo]

Please help. Is there any guide to troubleshoot?

[richardkhoo]

continue

[adafruit_support_bill]

Soldering appears OK. Did you remember to put a blob of solder under the battery holder? That is required for good contact.

Also, try running the CardInfo sketch in the SD library. That will tell you if the SD card interface is working properly.

[richardkhoo]

Hi,

I got an error when I tried to upload the CardInfo sketch. Please see the image. May I know how can I retify? Thanks

[adafruit_support_bill]

Looks like you have two copies of the SD library. If you installed the Adafruit version, you need remove the old one completely from the Arduino Libraries folder. It is not sufficient to re-name it. It must be removed from the folder completely.

[richardkhoo]

Hi,
apprently, it is working fine with the SD. Am I correct?

So, may I know what should I do next? Thanks

[adafruit_support_bill]

Looks like your SD is working OK. Still getting strange numbers from the RTC?

What sketch are you running?

[richardkhoo]

Hi,

I'm back. I still get strange numbers. I ran ds1307 sketch. pls help. thanks

[adafruit_support_bill]

The shield was designed for the standard Arduino. The Mega has different pins for I2C. When using a Mega, you need to use 'softI2C' to talk to the DS1307.
viewtopic.php?f=25&t=13722#p66953

[richardkhoo]

Hi,

It is working now. Thanks for your help.

May I know how can I get the LED to work? In what situation I would be able to see blinking of the LEDS?

Thanks

[adafruit_support_bill]

The leds are configurable with jumpers. You can connect them to any pin and control them in your code.
The Light-Temp Logger example uses them. See the jumpers to pins 2 and 3 in the photo.

http://www.ladyada.net/make/logshield/lighttemp.html