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Unread 19-02-2007, 00:06
Dan Richardson's Avatar
Dan Richardson Dan Richardson is offline
iR3 Creative
AKA: Dan Richardson
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Team Role: Engineer
 
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Re: does anyone have OI and RC radio issues

Quote:
Originally Posted by Swampdude View Post
We did cell phone tests tonight. BINGO! Make or recieve a call within 30 feet of the bot and it starts glitching bad (this distance may be greater but I was on the phone and walked away from it and it seemed to get better after I was in the next room). Then also just hold it near the bot (while not in use) and every 15 seconds or so it starts fluttering.
So whats the answer, ban cell phones from the competitions? Can someone get IFI to read this thread? Someone said if it is a cell phone issue, you can't fix it. Which I gather those frequencies can't be altered out of that range? I contacted the FIRST Florida rep (Charles Kennedy), and he's waiting to hear back from FIRST. The way I see it, this is a bigger issue than the banebot problem because we all need to use these radios.
Dan, We did the same thing as well today. Everyone in the room 1 by 1 would call their voicemail with their cell phones. We noticed an interesting pattern, while my service ( Sprint ) never seemed to cause the robot to lose radio contact, EVERY SINGLE TIME a cingular or AT&T serviced cell phone was used the robot would immediately lose radio signal. We also found that each time the phone would reconnect with the towers to re-establish signal the robot would break the frequency.

My service is Sprint, and the other sprint phones also never-( or atleast noticeably ever ) tripped the radio. Now the way I understand it Sprint uses a different cellphone technology than both Cingular and At&T. Its this technology that we believe is tripping the radios. We know for a fact that the cell phones would trip the radio, because we tested repeadtly for about 15-25 minutes, turning them off walking away hiding them then calling them or making calls with them.

I don't claim to have any clue whats going on, this is probably apparent due to the vagueness of my post however I do realise there is a problem. During our skrimmage yesterday, there were many times where people came very close to being hurt because of the radio frequency loss, then the robot suddenly coming to life near the sides of the fields. You don't have to be an electrical engineer to realise this is a problem. This type of problem not only can greatly corrupt the competition, it could also cause some significant safety issues, or even potential damage to our robots, I'd hate to see a robot lose radio contact as its driving up a ramp and flip over causings thousands of dollars in damage.

I really hope that IFI will do something soon. I completely agree with you Dan this is a HUGE issue. In the case of the bane bots, if problems occured, at the very worst we could always change companies, or come up with custom solutions. With IFI there is no other option. I know they realise this, and trust they will come up with a solution as they always do. Lets hope it comes before regionals, otherwise get ready to see some of the most interesting/unsightly regionals in years.
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Last edited by Dan Richardson : 19-02-2007 at 12:07.
 


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