Your answer doesn't make much sense: do you (we) know for sure whether the RTH command travels from RC to AC via 2.4GHz or via 5.8GHz, or both (depending if it's initiated via switch on the RC, or via DJI GO app)?
RTH on WiFi Signal Loss
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Your answer doesn't make much sense: do you (we) know for sure whether the RTH command travels from RC to AC via 2.4GHz or via 5.8GHz, or both (depending if it's initiated via switch on the RC, or via DJI GO app)?
It makes no difference as far as the command goes. It travels from the RC ( Regardless of the app) at 5.8GHZ, to the AC either method. The app is only an RC interface, that utilizes the same transmission from the RC to AC. 2.4GHZ is downlink only. This is what is different with the Standard as opposed to most of the other Phantoms, and gets confusing at times. It is also why, the Standard has less range for the most part than those that use Lightbridge.
Meta4
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If you are in the open with no obstacles to hit, there's nothing to screw up.
Fly your Phantom 100 feet away and shut down the controller.
Watch the Phantom come back.
Not to worry - @Meta4 is right. As it happens I just did an experiment with my Mavic where the RC was turned off so that it would RTH. Take a look at
(Warning) Avoid this low battery RTH mistake
2.4GHz is not for downlink only. 5.8GHz is one-way only (from RC to AC), but 2.4GHz is a two-way channel between DJI GO and the AC, through the RC. So while we often refer to it as the "downlink", it's technically incorrect: the bulk of the data (video, telemetry) is indeed from AC to GO, but several commands (camera operation, settings) travel from GO to AC.
You say that RTH travels exclusively on the 5.8GHz: is that a verified fact? How do you know?
Hope @solentlife is watching this, as I believe he would have something to say here...
That is what I said, don't confuse the 2.4GHZ interface between the Device and the RC, with the signal to the AC. They are not exactly the same. The device cannot transmit to the AC, it has to interface with the RC first to accomplish that, it just happens to be on the same 2.4GHZ channel. It is not possible for the device to transmit to the AC via 2.4GHZ, without the RC doing that for what is commanded by the device to the RC interface and sent at 5.8GHZ.
Well, you clearly said "2.4Ghz is downlink only"... that's hardly a confirmation of my statement that 2.4GHz is a two-way communication...
And even your last response is a bit confusing to me... it's all good until you say "sent at 5.8GHz", as that implies that ultimately all commands are sent to the AC that way. From what I read, some commands indeed travel on 2.4GHz all the way to the AC (via RC, which acts as a repeater).
But rather than continuing with this "you said, I said, you said" ballet, why don't you - if you happen to know it, of course - clearly explain what commands travel on what frequency?
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Going to have Anniversary Dinner with my better half. Peace..........
Have fun! Sorry for the edit, I didn't like what I posted and I wanted to rephrase it better.
To continue on the subject, my understanding (based purely on what I read, as I have no way to validate this) is as follows:
- Stick Movements: from RC to AC on 5.8
- Camera Controls: from GO to AC (via RC "repeater") on 2.4
- Some settings (things like gimbal speed and RTH altitude, which are stored in the AC): from GO to AC (via RC "repeater") on 2.4
- Video Feed and Telemetry Data (position, battery, etc): from AC to GO (via RC "repeater") on 2.4
- RTH: no idea (it could be triggered via RC or GO)
- Camera Tilt: no idea (it could be controlled via RC or GO)
@solentlife: Nigel, we really need you here...
- Stick Movements: from RC to AC on 5.8
- Camera Controls: from GO to AC (via RC "repeater") on 2.4
- Some settings (things like gimbal speed and RTH altitude, which are stored in the AC): from GO to AC (via RC "repeater") on 2.4
- Video Feed and Telemetry Data (position, battery, etc): from AC to GO (via RC "repeater") on 2.4
- RTH: no idea (it could be triggered via RC or GO)
- Camera Tilt: no idea (it could be controlled via RC or GO)
@solentlife: Nigel, we really need you here...
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RodPad
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Sorry if this is a stupid question but am I right in saying the controller uses 2.4Ghz to connect to your phone and it uses 2.4ghz and 5.8Ghz to connect to the aircraft? What band does the controller use for video and what band does it use for control?
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@Fly Dawg, @RodPad, @kevinp3s and myself had a bit of an offline conversation about this topic, and this is a diagram that will hopefully answer most questions about P3S communications:
PS: Camera Tilt could potentially go via 5.8GHz from RC to AC as there's a dedicated dial on the RC, in addition to the slider on DJI GO, but my guess is that it goes up via 2.4GHz, like all other camera-related controls.
PS: Camera Tilt could potentially go via 5.8GHz from RC to AC as there's a dedicated dial on the RC, in addition to the slider on DJI GO, but my guess is that it goes up via 2.4GHz, like all other camera-related controls.
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RodPad
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RodPad
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