Bluefruit EZ-Oopsie

[sparkle]

Hi,

What would be the possible effect of shorting the DTR pin to Vin on my Bluefruit EZ-Link?

I can connect to it and pass the loopback test, but I can't get the DTR/DSR test working. I'm not sure if I've damaged it or not as I was setting up that test for the first time when I got the pins wrong.

Thanks
:(

[adafruit_support_rick]

Shorting DTR to Vin should not cause a problem.
Are you using a Mac? The DTR/DSR test doesn't seem to work on Macs.

[sparkle]

I'm using X-CTU and have tried both Windows 8 with an external USB adapter and Windows 7 with an internal adaper. As far as I can tell changing DTR on the PC has no effect at all with or without link between DTR/DSR. I've also tried measuring it with a multimeter and the signal never moves. I presume this means the reset from the Arduino IDE wont work?

[adafruit_support_rick]

Have you actually tried it with the IDE? The DTR/DSR testing thing can be a little iffy sometimes.

[sparkle]

Heya,

I've hooked it all up to an Arduino UNO R3 with the reset cap etc as per the tutorial. Uploading a sketch from the IDE does not work by itself:

avrdude: stk500_getsync(): not in sync: resp=0x00

After the Bluetooth connection comes up the TX light on the EZ-LINK flashes a couple of times then it sits until the error above appears. The Arduino carries on executing whatever it was doing before. If I start the upload then manually hit the reset button on the Arduino as the Bluetooth connection comes on, I can often get the sketch to upload and execute fine. I guess this means the general transmit/receive of data is working OK, but the reset is not being sent through.

I don't seem to be able to talk with the Arduino via the Serial Monitor though, perhaps I'm just misunderstanding how I should do that. I can see the TX and RX lights on the EZ-LINK flashing when I expect but nothing displays on the monitor. The same sketch connected via USB cable works as expected.

Thanks for all your help!

[adafruit_support_rick]

Hmm. Let's replace the EZ-Link. Please email [email protected] with a link to this thread for a replacement .

Not sure why your sketch isn't working with the EZ-LInk. See if you still have the problem with the replacement...

[sparkle]

Done, thank's for your time rick :)

[sparkle]

Just wanted to follow up on this one and say thanks for the replacement, it is working great and passes all tests.

[adafruit_support_rick]

Great! Thanks for the update! :-)

[sparkle]

Actually one thing I notice on the old one that does not work correctly is that the IC directly above the 3V pin gets extremely hot, not nice to touch. Possible short there somewhere?

[adafruit_support_rick]

That would be the voltage regulator. There's probably a short someplace.