Something like Multichannel
Something like Multichannel
Hello all,
I'm totally new to OpenTX, and as a ship model builder I wonder if there is something like "multichannel" as supported by Graupner/SJ-Hott TX/RX systems. Multichannel means, that 8/16 switch positions are encoded into one prop channel. In this mode two long ppm pulses (as sync) and then the 8-switch positions are encoded.
Any hints?
I'm totally new to OpenTX, and as a ship model builder I wonder if there is something like "multichannel" as supported by Graupner/SJ-Hott TX/RX systems. Multichannel means, that 8/16 switch positions are encoded into one prop channel. In this mode two long ppm pulses (as sync) and then the 8-switch positions are encoded.
Any hints?
Re: Something like Multichannel
Really no expert advice?
Re: RE: Re: Something like Multichannel
Ok. This makes more sense than your other post.wilopaan wrote:Really no expert advice?
It sounds like impossible with lua. But opentx allows up to 16 channels on sbus, if I'm correct. There are sbus decoders available. And you can add a module to get 32 sbus channels.
Re: Something like Multichannel
I also do not see the added value of creating a multimodule functionality in OpenTx.
First of all, because there already is an option for 32 channels, but also I think if you would want to expand with external modules then I would suggest using the Sport telemetry link to transmit the additional datastream instead of mixing multiple values on one channel.
First of all, because there already is an option for 32 channels, but also I think if you would want to expand with external modules then I would suggest using the Sport telemetry link to transmit the additional datastream instead of mixing multiple values on one channel.
- MikeB
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Re: Something like Multichannel
The problem is openTx (and erskyTx) don't have direct control of the RF link. They send control data to whatever Tx module you are using and the receiver then generates the servo pulses that may include SBUS. The SBUS data may be output twice as often as "normal" servo pulses.
Assuming what you are actually looking for is many on/off outputs at the receiver, perhaps have a look at here: https://openrcforums.com/forum/viewtopi ... =84&t=7299.
Mike
Assuming what you are actually looking for is many on/off outputs at the receiver, perhaps have a look at here: https://openrcforums.com/forum/viewtopi ... =84&t=7299.
Mike
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
The difficult we do immediately,
The impossible takes a little longer!
Re: Something like Multichannel
Is it possible to receive 32Channels with a FlySky-Ia6b receiver? And output these channel via IBUS-protocol?tonnie78 wrote: ↑Tue Mar 03, 2020 6:38 am I also do not see the added value of creating a multimodule functionality in OpenTx.
First of all, because there already is an option for 32 channels, but also I think if you would want to expand with external modules then I would suggest using the Sport telemetry link to transmit the additional datastream instead of mixing multiple values on one channel.
Re: Something like Multichannel
Ok, thank you. That clearifies all. So, there is no sync between the OpenTX and the RF-module, that generates the effective data-stream to the RX?MikeB wrote: ↑Tue Mar 03, 2020 9:47 am The problem is openTx (and erskyTx) don't have direct control of the RF link. They send control data to whatever Tx module you are using and the receiver then generates the servo pulses that may include SBUS. The SBUS data may be output twice as often as "normal" servo pulses.
Re: Something like Multichannel
I assume, the switches of the TX are digital monitored, so there is no noise by an analog sampling or so. Then it should be possible to mix the switches togethher to produce a mixer-output that is easy to decode on the receiver side, when the channel output is digital via IBUS/SBUS.
For three 3-way switches to encode there a 81 distinct values to generate, for four 3-way switches it would be 243 values. Sounds possible, I think.
For three 3-way switches to encode there a 81 distinct values to generate, for four 3-way switches it would be 243 values. Sounds possible, I think.
Re: RE: Re: Something like Multichannel
Build your own switches on receiver side by a multiposition physical turn switch linked to a servo.wilopaan wrote:I assume, the switches of the TX are digital monitored, so there is no noise by an analog sampling or so. Then it should be possible to mix the switches togethher to produce a mixer-output that is easy to decode on the receiver side, when the channel output is digital via IBUS/SBUS.
For three 3-way switches to encode there a 81 distinct values to generate, for four 3-way switches it would be 243 values. Sounds possible, I think.
Re: RE: Re: Something like Multichannel
Thats a good joke!lshems wrote: ↑Tue Mar 03, 2020 5:02 pmBuild your own switches on receiver side by a multiposition physical turn switch linked to a servo.wilopaan wrote:I assume, the switches of the TX are digital monitored, so there is no noise by an analog sampling or so. Then it should be possible to mix the switches togethher to produce a mixer-output that is easy to decode on the receiver side, when the channel output is digital via IBUS/SBUS.
For three 3-way switches to encode there a 81 distinct values to generate, for four 3-way switches it would be 243 values. Sounds possible, I think.
I prefer the µC + MosFet variant ...
- MikeB
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Re: Something like Multichannel
I make it one 3-way switch needs 3 values, two 3-way switches need 9 values, three 3-way switches need 27 values and four 3-way switches need 81 values.
Mike
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
The difficult we do immediately,
The impossible takes a little longer!
Re: Something like Multichannel
Re: Something like Multichannel
Correct.