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Canada
Asked — Edited
Resolved Resolved by DJ Sures!

Ez-B Communication Error - Flaky Connection?

Product - Revolution:SIX

Product is in brand new condition. We took the plastic off the box this morning (it was supposed to be a Christmas gift for our son). We read through the online getting-started tutorial(s) and are now trying to setup the robot.

When we we turn on the power the servo motors twitch, as expected, but the EZ-B says "communication error" repeatedly.

When I apply downward pressure to the EZ-B I hear a start-up chime, and a blue light begins to flash. Then I can see the EZ-B WIFI connection from my computer and connect to it. I can correctly connect to the EZ-B from the builder software.

However, as soon as I release the downward pressure on the EZ-B the wifi connection disappears.

The EZ-B seems quite loose in the base plate. I can rotate it horizontally by a small amount, it's definitely not snug. Is this a QC issue? Again, product is in new condition. Two adults attempted to assemble this. Nothing was dropped or treated roughly.

Rhyan

AI Support Bot
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Synthiam
Canada
#2  
Yes, I should have mentioned that we did already try this, and it did temporarily help the issue (for about 1 hour we were able to get a wifi connection without constant pressure).

Now we're back to the original problem where constant downward pressure is required to make a wifi connection.

We haven't tried any other troubleshooting procedures.

Rhyan
#3  
It helps if you mark the tutorials as complete when you take them. I checked your profile before posting the link to see if you had seen it.

Still sounds like a connection issue, although I suppose it could be an internal connection. Does it matter where you press? ie, if you press directly over the power connector is it more consistent then pressing in another spot? You could try gently jiggling the power connector where it comes through the EZ-B case to see if it is loose on the board, or if it is really just having a problem getting the pins to hold. Same for the connector in the SIX body. The connector should not move inside the body.

Alan
Canada
#4  
Thanks, we'll mark the tutorials as complete from now on.

Pressure directly over the connector or in the center of the EZ-B seems to work the best (I don't notice any difference between those two spots). Pressure over the corners doesn't work.

The connector in the SIX body feels loose to me, or at least more loose than the connector on the EZ-B. I can get it to noticeably wiggle with gentle pressure.

Rhyan
#5  
I am unsure what the other thread says, but try cleaning the power connectors with alcohol.
Then try bending the pins/tabs on the female parts of the mini deans connector inwards, in order to get a better pinch of the pins. If it is all revolving around the power connector(mini deans on bottom of ez-b pcb) then the only other option then would be to inspect and look for bad solder joints, and the connector being loose on the board.
#6  

Quote:


The connector in the SIX body feels loose to me, or at least more loose than the connector on the EZ-B. I can get it to noticeably wiggle with gentle pressure.


It should barely move, and should spring back to position if you do push it. If it is freely wiggling around, or up and down, I think it may be loose inside the body.

I am going to open up my adventure bot to see how it is attached before providing additional advice. This might be an easy fix with some glue or a screwdriver, or may be a warranty issue (I hope not, but EZ-Robot is really good about dealing with warranty returns if needed).

Alan
#7  
OK. Body open now. The connector is on the end of a small circuit board that just sits on a plastic peg and a little support in the center. The top of the body then presses down and holds it in place.

I would check to see if the 4 screws that hold the body together are all tight. If the top and bottom are not tight, the connector can move around. If they are tight, you could try opening the body and adding a bit of hot glue under the board to hold it in place better (and also inspect for any cracks in the support). You can also check that the fuse is tightly inserted, although I doubt that would be the issue because it would not respond to pressure from the top.


Note: you do not need to open the battery compartment when you open the body, and if you are careful you should be able to do it without removing the legs from the body.

If everything seems right inside, I would try again with tightening the connector pins as in the tutorial I liked to, and if they won't hold it tight, reach out to EZ Robot support through the Contact Us link (Likely someone will see this post and have other ideas to try before dealing with warranty).

Alan
Canada
#8  
Thanks for the help, Alan. We'll give your suggestions a try tomorrow and update the thread.

Rhyan
PRO
Synthiam
#9  
The question to ask is if your power led goes out when "no pressure is applied". Because this may entirely be an issue with the computer wifi and virus scanner software or firewall.
Canada
#10  
The led in the lower left quadrant goes out when I stop pressing down. There is a blue led in the upper left quadrant that is always on when the power switch is turned on.
PRO
Synthiam
#11  
Does the ezb make a chime when the power is turned on?

If the blue led is always on, then that means it has power. The led requires power to glow, much like the lights in your home. So that's good news - it rules out any power related concerns. Additionally, the fitment of the dagacon shell vs roli or other shells isn't an issue. Each shell fits the ezb slightly tighter or looser by design.
Canada
#12  
No, the EZ-B doesn't chime when the power is turned on. A voice says "communication error". However, if I apply pressure, I do hear the chime and the blinking blue LED in the lower left quadrant turns on. At this point the "communication error" warning goes away, and I can connect to the wifi.

If I release the pressure, the lower left led goes away and so does the wifi connection.

Rhyan
PRO
Synthiam
#13  
I have a feeling one of two things has happened during shipping.

1) the connector that connects the top and bottom pcb within the ezb has vibrated loose. The ezb would need to be opened with 4 philips head screw driver and pressed by hand back together.

Or

2) the magnets within the ezb shell have vibrated loose and need to either be removed entirely or re-glued with a super glue. There's no reason they couldn't be entirely removed for convenience to get up and running quicker.
Canada
#14  
Thanks for the tips - we're out of town for a few days so it will be a few days before I can try these out and update the thread.

Rhyan
PRO
Synthiam
#15  
Okay! I'll be here when u get back:D Have a safe trip!
Canada
#16  
Hello again,

Today we took apart the ez-b shell as suggested. We see two magnets in the lower shell, neither of which are loose.

We tried pressing the top and bottom pcb boards together (they already seemed very tight) and re-assembling, but the issue was not resolved.

Then we took off the upper part of the ez-b shell, turned on the power and tried pressing on the top board to get the led light to blink (and chime). Pressing on the *upper right* corner of the board is the most effective. Pressing on the center works as well, but more force is required.

Attached are a few pictures of the upper-right corner of the the ez-b. The bottom plastic screw post has some damage, and there is a connector pin pointed horizontal. Is that normal? Or has the pin been bent?

Thanks,
Rhyan


User-inserted image


User-inserted image


User-inserted image
PRO
USA
#17  

Quote:


Is that normal? Or has the pin been bent?


R: No is not normal, looking to the last picture it seems you have 3 pins disconnected (A7,VCC,VCC,).

my EZB:
User-inserted image


Communication error message is related to the serial communication between top and bottom part i.e. (4 pins in red) when you press you get lucky.
PRO
Synthiam
#18  
That is surely not normal, as @ptp says.

Thanks for your patience while we debug the issue. Please Contact Us and we will make it right. Reference the link to this thread in the Contact Us for warranty support.
Canada
#19  
Ok, thanks everyone! I'll file a warranty claim.

Rhyan