From what I’ve observed the secondary will just send signal over can and act like the primary. I mean even today you can have just one receiver plugged into the secondary esc and it still acts like normal.
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only possible if your ESC has 2 PWM ports ofc.
Just set the control mode to “off” and app mode to “uart” on the backup rc side. The side with the rc will just send the pwm values to the other esc over can. Swap the settings between canbus escs to change rcs.
At least, the equivalent of this worked on my esc with an OSRR and a Puck.
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I don’t see why you would need to touch the control type at all? If they were both set to ppm or ppm & uart it should just work for whichever remote is powered on?
Turning on both remotes at once might be interesting 
with a uart remote (OSRR) and PPM(pwm, hoyt) plugged in at the same time. if the setting is PPM + UART then the idle signal from PPM remote would mess up using the uart one.
I suspect the same would be true if you replace UART for can message. but haven’t tested.
so i had to turn off PPM when using uart. and I suspect you’d the dual vesc, you’d have to disable PPM in the unused side or it would follow the idle receiver.
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I think your describing a PPM(it’s actually pwm…blah ) merger. and i don’t believe this will work. the idle signal and the of the unused receiver would mess with the signal of the other.
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That was not the case when I was using the osrr/puck. Seemingly it was sending “no input” and “current throttle input” signals causing the motors to freak out
Yeah we are specifically talking about 2 ppm remote receivers, no uart
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I’ve ran with a puck backup and uart mains for quite a while. Just have to switch from uart to ppm when switching remotes. Quite handy if issues arise or ya run out of juice.
Can’t say I’ve seen it done with 2 PPM remotes before.
Following
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But if there is no signal at all on the secondary ppm is it still considered idle?
i think we need to clarify no signal meaning:
remote connected but no input
or
remote disconnected
i think the remote connected with no input would consider as idle? and remote disconnected would be no signal? but idk how each receiver preceive each situation
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I think the problem is the esc will broadcast “no ppm signal” on can while the other broadcasts “5% ppm signal” on the other. Just depends on how vesc works. Gotta try it and find out.
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It depends on how the receiver works. Some will send nothing when the remote is disconnected
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This was what i was trying to say.
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My method works no matter what your setup is, it just requires extra effort. If I find time I can try this with two pucks and a pair of flipsky 4.12s
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Yeah i’m thinking your way is the way to go @Evwan . I’m wondering if this is why I experienced this behaviour, ppm enabled on both sides at once and making changes to app settings may have confused the vesc into thinking both sides were primary…
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ah i was thinking all ppm (pwm) receivers send an idle/neutral signal. which ones don’t ?
The gt2b won’t if u don’t set up failsafe right
oh,
the g2tb receivers definitely do send a signal when no remote is connected.
when you turn it on with no remote it starts at stored fail safe frequency.
if you haven’t set this up I believe it’s 1500µs
if you connect a remote and power it off, it jumps back to stored fail safe frequency.
in my convos above i was assuming the failsafe is always same as neutral from remote, and so called it neutral/idle.
side note, after power on if no remote is connected within 30s they will jump from the stored fail safe frequency to 1500µs exactly, which idk why it does that. but it’s dumb. if your neutral was a lower frequency this will cause runaway. so I always set g2tb neutral to just above 1500µs
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I honestly had no idea this was the case. Always figured the ppm (pwm) cable had to be plugged into the primary esc side
Well this is good to know. That’s dangerous.
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