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March 20, 2015 at 11:42 am #1647
martin
Participant

Updated mini unit (#18) today.

I was using a cheap USBasp from China (Model betemcu.cn), and I desoldered a CMS resitor to have 3.3V.

Cheap USBasp from bitemcu.cn

For those having communication troubles (USBasp appear to be incorrectly working), there is a fix. There is 220 Ohms resistors between SPI lines that sometime broke connection. Just remove them. See this post (with image): http://www.rc-cam.com/forum/index.php?/topic/3827-er9x-hacks/?p=27092

I did the upgrade on a Mac Os (hackintosh), using CrossPack fro AVR (the one featured in Radu article).

Everything went good, and I have a nice and powerful unit with JSON reading! 😀

  • This reply was modified 11 years, 2 months ago by martin.