Hi everyone,
I've been trying to use my Bluno nano DFR0296 (Bluno_Nano_SKU_DFR0296-DFRobot) for quite some hours now.
My goal is to connect it to my phone so I can recover data that are stored on a .txt located on a SD card. I've done the .txt recording (from sensors) on a SD card using a regular nano. Everything's works fine.
Now I want to upgrad to a Bluno nano to retrieve the .txt through BT.
So my first tests using the Bluno nano did not go well. I can connect and send Arudino script to it. I can access the AT mode and try different settings. i have tested many firmwares.
But with all the tests I have done I was not able to connect my phone to the Bluno nano using the "BlunoBasicDemo" Android application provided by DFRobot or another one developped using MIUT App Inventor that I found on the net.
Any hints? Anything ? 
I'm completely helpless ahah
Thanks
Or if you have another way for recovering a .txt file from a SD card connected to an Arduino, I'll be happy to hear it 
@iforire, because you can upload code, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project 
See About the Installation & Troubleshooting category.
Not wanting to chase you away, but DFRobot has their own forum (https://www.dfrobot.com/forum/); you might want to try there.
No problem, thanks for the tip
Hi everyone and merry christmas
I finally managed to connect to my Nano Bluno through Bluetooth but I think I've burned the microcontroller since it says the typical error "stk500_getsync(): not in sync:resp=0x00" when I try to upload a sketch.
Do you think I should buy aUSB-ASP programmer to try to reprogram the ATmega328p microcontroller and it won't solve my problem?
Thanks a lot!
Juste in case someone can help me as I've burned two Bluno Nano and I don't know how to restore them. (And the DFRobot Forum is full of sh**t posts and it seems that nobody goes there anymore). Thanks!
You can try re-programming the Atmega328 directly using ICSP but you need a dedicated programmer. And it looks like the Atmega or the Bluno runs on 3.3V so be aware of that
Thanks I'll take a look at how to do that!
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