Flashed Thingy52 with espruino, now DFU mode doesn't work.

[Michael_]

I was on Instagram, and I won a green nordic 52 from Nordic. I got it, became frustrated because I didn't have a JTAG debugger, and flashed espruino onto it with nRF toolbox on my Android s I could get it blinking and buzzing for a conference I was going to. Now I want to use thingyjs

https://github.com/NordicPlayground/Nordic-Thingy52-Thingyjs/blob/master/README.md 

And I assume I need the default firmware to use the library, but now I can't get the thingy into DFU mode to flash the default firmware back onto it. It there a pin I can bridge or something so it drops the current firmware or forces DFU mode? I really want to build a web app with the Thingy52.

[Hung Bui]

Hi Michael, 

If the bootloader is unmodified, you should be able to enter DFU mode by holding the button when power on the thingy. The LED will change to green when in DFU mode. 

You can also flash the thingy if you have nRF52 Development board.