Radio sos

[Kettering]

To be more specific, our controls work properly when the bot is tethered. When we try to control it through radio transmission there is no signal. The obvious answer is that our transmitters arent working properly. But we have tried several transmitters and nothing has worked. Also the rc says that the radio transmission is working fine yet the actual transmitors remain on standby

[MWTrek]

Something like this happened to us at Bash at the Beach. We were out two matches. We worked properly for about 5 secs and then lost radio signal. The on hand FIRST rep took a look at it. No one could figure out what the problem was. We took the robot out onto the field to diagnose the problem after the quals and it seemed to work fine. It was strange.

[Kettering]

How can I be sure if we have the correct transmitter? Like, how do I know if they are the same year and which goes to the OI and which goes to the RC?

[Alan Anderson]

Originally Posted by Kettering

When we try to control it through radio transmission there is no signal. The obvious answer is that our transmitters arent working properly.

How are you determining that "there is no signal"? What makes it obvious that the fault lies in the transmitters rather than in a receiver?

What year's OI, RC, and radios are you using? What version of the RC master code is loaded?

Please describe for us exactly what you have plugged in to each 9-pin connector, including the cables in the detailed description. Tell us what switches you're flipping, and in what order. Let us know what indicators are lit on the OI, both radio modems, and the RC. Try not to gloss over anything in an attempt to make it easier for us to understand. Without the actual specifics of what's happening, it's very hard to tease out what might be the problem just by reading your interpretation of the situation.

[Dan Petrovic]

We had a problem like this very recently.

All it took was switching out a serial cable. Our OI and both radios said there was no signal.

You mentioned that the RC says it's working. I may be wrong on this part, but working would mean that all lights are lit green. Is this the case? When we had radio issues (which turned out to be a serial cable issue) the "Radio Modem" light was orange.

[Mike Martus]

I am closing this thread as this is a OCCRA (Oakland County Competitive Robotics Association) issue using older IFI controls.