Woohoo!! Bluetooth sketch loading cracked!
I’ve found that it helps if you RTFM!
As you were…
Any details? Are you using a Bluefruit EZ-Link with an Arduino?
Neat? I guess? It sounds neat, I think. Hard to tell.
@Jason_Coon no, a cheap $4 Chinese HC-05 clone. And the details are here: http://makezine.com/projects/diy-arduino-bluetooth-programming-shield/
Except, I didn’t use a shield, just a bit of protoboard and a $3 Nano. I guess my out-the-door cost was under $10 - half the cost of the Bluefruit unit on its own. And it works with any 328P or Mega. I suspect I can make it work with my Leaf’s too.
We (my father and I) had been knocking this back and forth for a while, but couldn’t get it to work - until I found that tutorial. You need to follow it exactly. And what he implies (with a diagram) but doesn’t explicitly say, is that once you have finished programming your bluetooth module, you need to move your TX/RX connections to Pins 0 & 1, for the bootloader to work properly. In effect there are two distinct phases - setting up your bluetooth module and wiring for BT sketch loading.
The electrical side is pretty forgiving - I didn’t have the right caps or resistors he used, but I got close and it works perfectly.
And yes, @Alex_Wayne it is really neat - like, reprogram your built-in, hard-wired FastLED sketch without having to disassemble anything. Upgrade your commercial product by distributing an executable containing avrdude and your hex file.