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OpenEVSE board for juicebox

I am considering buying the new juicebox retrofit board to get myself started in the OpenEVSE world. I have exactly zero experience with OpenEVSE, and some experience with DIY electronics (ESP-home).


Could someone help me figure out, before I jump in:


* Is that board all-inclusive, or is any additional hardware required?

* Is it compatible with a screen, or at least a button?

* Is it pre-flashed, or do I need to get a programmer too? Which one?


Thanks in advance.


@Ted Yes, the v1 is what you need.


@Jeff We put 3.5 and 5mm screw terminal pads on the v1 controller. If you are comfortable soldering you can do this yourself, if not we will offer a v0 version soon with the connectors soldered on for you.


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Any shot you could also provide the specs on the connectors used on the v1? I have a v0 that I'd be down for crimping some terminals on to in lieu of soldering screw terminals if I knew what to order.


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@Troy Dangerfield  I Have an old JB 75 PRO that never had LED's.

The Juice rescue board has LED's on the board, so I drilled the front of my case above the LEDs, and added 2 of these light pipes:

https://www.mouser.com/ProductDetail/VCC/LPC_190_CTP?qs=%2FvU7ivDUWU%2FsldLMwOiWiQ%3D%3D&countryCode=US&currencyCode=USD

Retainers:

https://www.mouser.com/ProductDetail/VCC/RTN_250?qs=%2FvU7ivDUWU%252Bzn2CqCPB3Sg%3D%3D&countryCode=US&currencyCode=USD

image

image




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@Nick Kelsey,

Yes, you have the board mounted upside down from how it was intended.  However, in my case, I had to mount it just like you did because my wifi antennae is on the bottom of the case and the wifi antennae wire would not reach.  I have the 75amp Pro version, and it was not possible to slide the ring down, as they had actually shaved some insulation off the wires to get the ring on.

So, yes, I cut and extended the pink wires as you have suggested.  And mine is working great.

Regarding the antennae, I suggest looking for an old internet router that no longer works to scavenge an antennae from. (computer geek friends or relatives, thrift store, ?)

Also, I drilled the front case, and added a light pipe above one of the LEDs.

https://www.mouser.com/ProductDetail/VCC/LPC_190_CTP?qs=%2FvU7ivDUWU%2FsldLMwOiWiQ%3D%3D

https://www.mouser.com/ProductDetail/VCC/RTN_250?qs=%2FvU7ivDUWU%252Bzn2CqCPB3Sg%3D%3D

IMG8335.jpg
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@Nick


The board was intended to be installed with the high voltage components at he bottom and low voltage at top, but with some versions the WiFi antenna is on the bottom, some on the top.


You can get the pink wire closer by sliding the coil down along the red/Black wire or flip the board over and reroute the power wires to the left of the plastic standoff to clear the bottom components.


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@Ben Ford Regarding the screw terminals, I think OpenEVSE has offered to solder on the screw terminals before shipping if you make a special request.  Also, there has been some discussion of the LEDs and options on the OpenEVSE Discord channel:  https://discord.gg/Y3ftbUd4rR



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I will throw out there that I have a v0 and possess very mediocre soldering skills. Was hoping to crimp some connectors instead. Honestly I'd just go for the soldering. It's literally the easiest soldering job I've ever done to put the screw terminals on. Only "tricky" part is I had to reroute wires due to different enough locations and had to replace the coil test wire as it couldn't quite reach. Again this was super easy as I already had comparable wire lying around.



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I upgraded my non-functioning JuiceBox V2 yesterday using both this OpenEVSE tutorial and this Youtube tutorial, which was useful but a bit unnerving as the youtuber got it wrong on the first try and never explains his mistake. In my caution, I labeled each wire as I disconnected it, first finding it in OpenEVSE tutorial using supplied pictures and text, then affixing a label matching the correct position on the OpenEVSE board. There are three same-sized plugs that you could mix up if not careful. My labels made it easy to get it right; the station is working perfectly! This is a great example of "reuse, repair, recycle"! Much of the JuiceBox is retained and reused, including all that copper, plastic case and fittings, beefy handle, etc. All that gets recycled is the old board. Thank you OpenEVSE and Chris Howell! Please consider making a specifications label that can replace the Enel X label, and a big OpenEVSE label to cover the word JuiceBox! 



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@Erik.


Remove part U2 the 3.3v regulator that powers the On-board WiFi.


The 6 pin harness between the controller and WiFi LCD has 2 red wires that cross and a Green and Yellow wire that cross. Each set will need to be uncrossed on one end so the harness is straight through.




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This drawing may help a little.

https://github.com/OpenEVSE/OpenEVSE_PLUS/blob/master/OpenEVSE_PLUS_v5/Advanced_v5_2020.pdf


From the Bottom of the image to the top.


The coil with 2 black wires is the AMP current coil. (not polarized)


The Blue wires right above and next to the Blue MOV Disk that go to the input side of the relay are AC INPUT (not polarized)


The next set of Blue that go to the output EV J1772 side of the relay labeled AC-J are AC TEST  (not polarized)


The Black connector with 3 wires (The 2 Blue are 12v Coil for the relay) and the Pilot are DC RELAY and PILOT  (not polarized) 


The Red wires are the GFCI Test Coil  (not polarized) 


The black connector above the red wires is GFCI coil.  (not polarized)  







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@Jeff James We have seen this a couple times. We have the parts to make an adapter. We will send you one at no cost.


Chris


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I got a v1 kit from OpenEVSE to use with my v1 Juicebox (orange+black metal box, same as Ted's post above). The install instructions were clear, except for the orientation of the LED flex PCB. I tried it both ways, on one it didn't work at all and on the other, it seems like the red charge LED is lit instead of the green power LED when the unit is powered and idle. When I plug into my EV, the blue Wifi led glows faintly and the charge indicator goes out. I'm guessing the pinout is not quite right?


The silkscreen on the PCB indicates PWR, WIFI, CHRG and +5V (bottom to top). When testing the ribbon cable with a bench supply, the pinout I get seems to be more like GND, CHRG, WIFI, PWR. Rather than common-anode (as the silkscreen would imply), it looks like it's common cathode. Another post on this forum shows the same (common cathode) pinout that I measured. My PCB version is 1.0.3.


Anything I could do to improve the situation?


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@Jeffrey Martin

I get a new "No Ground" error every time I shut off the breaker to my JB V1 with OpenEVSE rescue board installed.  I was advised this is not an issue, and there may be a firmware revision released in the future to optimize the timing of the no ground error.


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Thanks for your prior help.  I have wired up the OpenEV board with soldered on screw block terminals and got everything connected as per prior messages.  However when I plug the V0 (solid metal case) into the 240 outlet, nothing happens.  No lights, no click, nothing.  

I have left the metal cover off to watch the board.  

I have not tried to charge my vehicle yet.  


Is there some type of light or other that should be coming on with V0? 


 Also "AC Relay" was not used in this setup, per prior instructions.  


Thanks!


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I have installed the v1 retrofit board, and it was very easy, and works as intended, AMF to ENEL X!

If you have a V1 box with wifi antennae on the bottom, you have to install the new board "upside down" for the wifi antennae cable to reach the wifi chip, and "may" have to extend the GFCI test coil wires.  Just pay close attention to the connection labels printed on the replacement circuit board.


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