Emisar D4V2 Flash Kit Instructions (Official How To)

LED Flashlights – General Info
67

Received my flash kit. Soldering on the pins is very clean. Reflashed one of my D4V2 (no problems). Macro photography lighting courtesy of my D4V2.

68

Thanks, great thread! Super easy following the instructions, especially using an android phone.

69

I used the AVRDUDE method, only problem I had was I selected the wrong MCU from dropdown.

70

just waiting on my kit to fix my bugged D4V2! i dont use muggle mode, but damn its a great idea!

71

Got my flash kit today. Flashed 8/5/2019 hex in a few seconds using the Android phone app. Works great and the phone app really made it easier than using AVRdude (which isn’t that hard anyway). Thanks for the Android method! I hope any future Emisar lights use the same pad/via configuration for updating firmware.

72

My kit arrived today. USB recognized but avrdude wouldn’t communicate with light. Inspection of pogo pin soldering revealed that there were some sections with solder bridging the traces.
Simply dragging a thin X-acto between the pins along the board surface a couple times cleared it out. Flashed and good to go!

73

I received my flashing kit. Using the posts above, I was able to easily get everything working on MacOS, and now my D4V2 is updated. Thanks for taking the time to create these easy to follow posts!

74

hey all… im currently updating the firmware on my d4v2, im getting a mismatch on byte, anyone have an idea why this is the case? heres the output

75

Try a couple more times, making sure you're holding the pins steady. I ran into this problem as well. What I did - was flashed the other hex file (non Nichia version), and it worked. Then I went back and flashed the correct hex file for my light (Nichea version), and it also worked. Not sure what causes this error.

76

okay will continue trying, do you recall if you got the same error as below?

77

I posted an example of the "verification error" on the instructions. It was slightly different.

78

hmm yeah, i went to the older version and i get the same error… thinking…hmmmm

79

oh the usbasp, do i have to change the jp2 jumper? I have it all the way on the right (right being closest to usb port)

80

Note the jumper location, exactly as I got it from Hank.

81

trailhunter;

You're using the flash kit from Hank?

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Nah, I built my own Imgur: The magic of the Internet

83

"Nah, I built my own https://imgur.com/a/p2KgwEu"

That shouldn't be a problem, but where did the USBasp board come from?

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">Imgur: The magic of the Internet

That shouldn’t be a problem, but where did the USBasp board come from?

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amazon, ive been using it to flash fw3’s no problem. let me double check all the wiring one more time. im surprised the first check in passing.

85

Terry, I found the problem. So thinking this through and looking at my setup, I noticed that my wire leads may be a bit too long at 3v on the usbasp. So what I did is move the pin from 3v to 5v and guess what? That fixed my issue above. So basically, if you run longer leads, you’ll want to bump the voltage up to compensate for that voltage drop :smiley:

As you can see here, it updated just fine now.

86

Congrats.