So we are looking at connecting two ground stations to one of the still image payloads. To do so, we attempted to connect all three RFD's by making all of the settings the same. We could get one ground station to connect to the payload and receive pictures, but once the second ground station (so the 3rd RFD) was turned on it appeared to disrupt the connection between the other two. When this happens the payload no longer communicates with either of the ground stations.
First thing we tested was distance between the ground stations for maybe some type of interference (not sure what it would be but we tried it anyway) and that did not help. The ground stations where about 100ft apart and 100ft from the still image payload.
Is there anyone with some advice to get 3 RFDs to communicate together so that we can pull pictures from the same payload at the same time from two separate ground stations?
So we are trying to upload the new firmware. We have sucessfully gotten it to upload on two of the RFDs however we get the following on the third when trying to upload it. We ran into the same problems with the others but we manage to get firmware to upload after several attempts of plugging and replugging. So any help on why this one wouldn't be uploading?
Just another quick check, I think the default baud rates for these modems is 57600. Is the third modem expecting 38400 or is it set to 57600? We have noticed that when updating setting on ours, sometimes they fall out of sync. It looks like on the third modem you can't get a "hand shake" which is why I ask about the baud rate.
We managed to get the RFDs to all update and to the same settings. To be honest it was a lot of closing out of the RFDTOOLS and reopening it. It seemed to work randomly as if it was buggy or something.
Needless to say we have managed to get all 3 RFDs talking together at the same time. We did run into this problem however now (see picture below). This may be a separate issue but it seems given the circumstance it could be related.
The screenshot of your error looks like the radios were not paired, green led flash. I would use the 3dr program to check the signal strength of the remote radio before starting the rfd python program. The remote radio signal strength should be a fairly steady/straight horizontal line, if the radios are not paired the signal strength plot of the remote radio will be zero or a square wave. The square wave will correlate to the flash of the green led. You will have to close 3dr before starting the rfd python program since you cannot have to programs trying to access the same com port at the same time. The 3dr program is not as buggy as the rfdtools. 3dr is in the rfd900 resources folder.