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Quick 1-wire ESC Flashing Harness
#1
Since my experience with EMAX ESCs and the "BLHeli" install on them I have a policy on my workbench that says every ESC when it arrives gets connected to something and flashed.  Basically they couldn't be flashed once on the built quad requiring them to be removed, flashed and the quad reassembled again!  The EMAX supplied firmware certainly didn't provide a good flying experience, once I had a normal BLHeli flashed on the quad became flyable and I was able to enjoy a new hobby.

The last batch of Multistar ESCs I bought the USB programming adapter to do the initial flash, but most ESCs don't need that special hardware and instead can be flashed via your Flight-controller OR via and Arduino.

Oscar has a great tutorial on that process on his blog. -- > https://oscarliang.com/esc-1-wire-bootlo...li-simonk/

This tutorial is to take you through a bit of a parts-bin scurry to show how I've made a very simple harness to do 1-wire flashing of new ESCs on the bench.  It removes the hassle of having built a new craft with ESCs all tucked away only to then struggle with bench flashing the ESCs - instead get them flashed when they arrive - you'll be able to do a basic determination of whether they even work!


My ESC's of the moment are DYS 16a Mini's I bought for AUD2.63 each from Hobbyking (https://hobbyking.com/en_us/dys-blheli-1...-2-4s.html)

They use 1mm pin-headers but could easily have the headers desoldered and be direct wired into any build. 

   

I'm going to make a cable that will let me use my XT60 to JST adapter that I had previously put togther to do bench testing of my brushless gimbal and other JST equipped gear.  It's a AUD5 switched JST  cable with an XT60 on one end

   

When I made that cable I actually cut off the JST socket to fit the XT60 so I'll reuse the JST socket for this adapter.  I've also hustled up out of the scrap pile a length of 3-wire Servo lead with plug, and a length of opto ESC cable with plug.

So then I've joined it all together and covered the joins with heatshrink:

         

The ESC "end" isn't going back into the connector shell as the pitch doesn't quite fit.  In fact I've had to use pliers to squash these down a little to get a good mechanical fit on the DYS ESCs.   Instead they are covered with heatshrink.

       

At this point I need to remind you that the power feed is LIPO voltage and you should actually attach whatever connector suits your ESCs - 2mm  bullets for example.  Ofcourse you could also direct solder the wires quickly to your ESC or use your imagination and try test-lead clips or similar if you have some laying about.

         

At the other end you can see the JST plug and the single wire to plug onto the Arduino.  I've also put some Dual-wall (adhesive lined) heatshink of the main join area to protect the wire joints and give the whole thing more of a harness feel.

Total cost was AUD0.00 becuase I keept all my off-cuts and connector ends and have a lot of heatshrink and stuff on-hand.  The XT60 and JST lead would be about $5 if you order one from Banggood and extra JSTs are about $1.
Builds: Mini-Quad  -  Tricopter 
A Blog

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