D-Link Randomly Dropped Wireless Link

[mtndurbin]

It appears that this dropped connection is not random or a loose connection.
Our triage of this indicates that under heavy current draw, like when the
drive motors are running, the 12v power can drop to around 7 volts.

This low voltage condition causes temporary failure of the power converter
supplying power to the dlink. This results in the dlink performing a power on reset.

If you can safely, watch blue lights on the dlink while you drive the robot.
At the point of failure all of the DLINK blue indicators will blink simultaneously.
This will indicate a power on reset has occurred.

What I am now waiting for is the official fix for this.

[Greg McKaskle]

Congrats on the troubleshooting.

Greg McKaskle

[Joe Ross]

Originally Posted by mtndurbin

Our triage of this indicates that under heavy current draw, like when the
drive motors are running, the 12v power can drop to around 7 volts.

This low voltage condition causes temporary failure of the power converter
supplying power to the dlink. This results in the dlink performing a power on reset.

What I am now waiting for is the official fix for this.

What is your wiring like? It sounds like you wired directly to the PDB through a breaker. You should have wired it to the dedicated 12v radio output on the PDB. This will output 12v until the battery gets to 3.5v or so.

[wireties]

Originally Posted by Joe Ross

What is your wiring like? It sounds like you wired directly to the PDB through a breaker. You should have wired it to the dedicated 12v radio output on the PDB. This will output 12v until the battery gets to 3.5v or so.

Is this allowed? Team 1296 had the same problem described here and we changed to using the 12V of the PDB but were not sure it is allowed.

[Mark McLeod]

Originally Posted by wireties

Is this allowed?

It is actually required.

[mtndurbin]

Originally Posted by Joe Ross

What is your wiring like? It sounds like you wired directly to the PDB through a breaker. You should have wired it to the dedicated 12v radio output on the PDB. This will output 12v until the battery gets to 3.5v or so.

Thx I wiil verify with our electical department

[Blackphantom91]

Its new for this year so it gives the Dlink the right voltage. Other things that have been happening is the power cable is lose and it needs to be secure during play because you will get hit and it could knock it lose. Make sure the cables are not bad and the port on the router is still ok. (very easy to destroy the inside of that port and its connections). just some percautions that we have recently taken. Best of luck.