Chief Delphi - Android Tablets

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Scouting (http://www.chiefdelphi.com/forums/forumdisplay.php?f=36)

- - Android Tablets (http://www.chiefdelphi.com/forums/showthread.php?t=119569)

MooreteP

03-10-2013 20:20

Re: Android Tablets

Quote:

Originally Posted by Barry Bonzack (Post 1293716)

I can cite this.

In St. Louis the FRC field next to the FTC fields had to shut down all wifi AND bluetooth devices because they were causing major problems with connection. At FTC competitions we require all forms of transmission from devices to be turned off, and request all phones be put in airplane mode. At the Florida FTC Championship, we had to delay the finals match because a handheld gaming system was causing interference.

The result, the field crew now has scanners, and volunteers are sent into the stands to locate where there interference is coming from, and request the device be turned off. If the interference comes from and the stands of FRC field, they must comply too.

I was one of the volunteers who circled the dome searching for the source of the interference. We were scanning for WiFi hotspots, not bluetooth.
There may have been a cautious reaction on the part of the field personnel to add Bluetooth to list of shutdown requests in the vicinity of the FTC fields.

Quote:

Originally Posted by AdamHeard (Post 1293725)

That's unfortunate. So teams going to champs need to read the FLL and FTC rulebook as well? That's a mess.

This, and all the spectators and employees of the venues at all competitions.
IDTS

solopilot

03-10-2013 23:35

Re: Android Tablets

Quote:

Originally Posted by AdamHeard (Post 1294428)

How does it feel quality-wise?

It's not iPhone quality. But it is better than $44 quality.
The biggest complaint is the screen and that the touch-pad registration is slightly off. You need to touch a bit higher than you expect. I guess I got used to that. Battery life seems OK. I can download files to it via USB, though I can't use it for Android development (driver issue.)

Walmart has smaller Android devices for $35. I'll evaluate one shortly. We are considering buying a bunch of them for a judge & RI app. Pls check it out at
https://play.google.com/store/apps/d...om.pejaver.gms

Login using demo : demo Comments welcome

solopilot

03-10-2013 23:51

Re: Android Tablets

Quote:

Originally Posted by MooreteP (Post 1294430)

There is a lot of BS going around about WiFi interference.
Though I have a vested interest in this, I think we need to stop the witch hunt and address the real technical issue.
The FRC robots currently use 5GHz 802.11N. (I think)
There should be no interference to them from 2.4GHz 802.11G or Bluetooth.
I don't know anything about FTC/FLL, but WiFi is not a threat to FRC.
And even if someone is transmitting 5GHz, the robots NEED to be resilient.
FIRST-FRC needs to pull the head out of the sand and find out the true cause of WiFi problems.

solopilot

03-10-2013 23:59

Re: Android Tablets

Quote:

Originally Posted by MooreteP (Post 1294430)

Citrus Dad

24-10-2013 18:20

Re: Android Tablets

Quote:

Originally Posted by jgustafson6156 (Post 1293371)

Bluetooth isn't allowed at competitions ether.

Can you let me know where that is in the rules? We're planning on using Bluetooth too.

Citrus Dad

24-10-2013 18:22

Re: Android Tablets

Team 1678 has posted a whitepaper on how we built a tablet based system using USB connections to a battery and a Raspberry Pi and readout to an iPhone. We're planning on an upgrade that we'll share later in the build season. We bought tablets that worked adequately for $80 each. You'll need 2 Raspberry Pis because of the limitation on USB ports.

yash101

25-10-2013 22:13

Re: Android Tablets

Pretty Cool! How did this work out? By how you say there wouldn't be enough USB ports, did you have wires all over the place? That can get pretty annoying, especially on the last day when there is a large crowd and you are scrunched in

Invictus3593

11-11-2013 09:18

Re: Android Tablets

Our team was looking at getting a few tablets for scouting and writing a program that gets the data from the tablets via bluetooth and puts it all into a spreadsheet; this program would run on a desktop in the pit and just sync when the tablets send the data.

I have not seen a rule that prohibits bluetooth in the pits, but please let me know if there is one.

What kind of tablet do you guys think would be adequate for >$100?

coalhot

11-11-2013 09:59

Re: Android Tablets

To get back to the OP, my tablet is a HP touchpad, which I got during the firesale. I put cyanogen mod on it a few months after getting it, and have been using it with android ever since.

I know it's a somewhat dated piece of hardware, but it will run pretty much all current android apps; it's a nice size, has very good battery life (even after abusing my battery for two years), and you can pick one up on ebay in the range of $90-$150. (it's slightly on the heavy side though).

As for the wifi issue, don't use wifi. Share data via bluetooth away from the field (like food areas), or set up a cloud-based service that lets all the scouters upload data when they get home. You could use a setup like this by having someone with a phone that has a data plan turn on hotspot, connecting all the tablets, uploading data, updating all the tablets, and then disconnecting. <- *edit: this scenario also happens away from the field, out of wifi range*

Just my $0.02

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