sebseb7 / sbustoppm Goto Github PK

Hi again,

I received a board based on your design and have a question about the voltage of the Spektrum output. My flight controller isn't responding to the Spektrum output, so I am trying to figure out the issue.

What does work so far:

• The flight controller seems to recognize the presence of the board (it beeps and complains if absent).
• The LED flashes on the board. Bursts of fast flashes if TX is not turned on. Steady slow flashes if TX is turned on.

What doesn't work so far:

• The flight controller doesn't seem to recognize that I'm sending channel data.

Note: This is a non-configurable flight controller from Blade 350 QX3. It is only meant to work with included Spektrum satellite RX.

From reading about Spektrum satellite RXs I think they only work on 3.3V, and my flight controller does output 3.3V. A possible problem I see is that my multimeter reads 5V between Spektrum VCC pad and GND on the PCB based upon your design. I expected it to read 3.3V when connected to the flight controller. I assume the 5V reading comes through the board from SBUS on the other side.. Is this a problem?

Also, does this mean PCB is sending 5V Spekrum serial signal when maybe it should only be 3.3V?

Things I tried:

• Disconnecting Spektrum VCC line to flight controller. I don't think it's needed if the PCB is already 5V powered by SBUS, right?
• Connecting Spektrum VCC and disconnecting SBUS VCC in order to power the PCB using 3.3V. The board doesn't power up that way.

Tonight if I am able to I will try to read Spektrum serial output from PCB to make sure it is outputting data.

Thanks for any help.

y connect the converter to a Frsky X8r an only can see in the cppm output 12ch.
is possible this? need to change any configuration ?
i selected in my taranis the channels 1 - 16.

thanks.

regards.
Ariel

I noticed that the ISP pins are not broken out . Does this board require pre-flashing the MCU before soldering on to the PCB?

Also, I was just wondering if this project is still active?

Thanks!

Dear sebseb7,

I couldn't find another way to contact you so I am contacting you like this.

I have the purchased the SBUS to PPM decoder from you and I was hoping that you can help me with the setup.

I have a Futaba T14SG transmitter and a Futaba R7008SB receiver set to "Mode B". Mode B is the mode where CH8 on the receiver becomes the S.BUS port for SBUS servos for example. However, I would like all channels to go through the S.BUS port, i.e. Channels 1 to 8 so that using a decoder, I can convert the S.BUS to a PPM-Combined for channels 1 to 8. I have the decoder wired to channel 8 on the receiver however I am not sure if there is something that I need to do on the transmitter to make this work. As mentioned, the transmitter I am using is a T14SG. I am decoding to PPM because I want to connect to the ImmersionRC Long range transmitter and this only takes PPM as an input. Images are attached below.

I initially thought that I need to register the PPM encoder with the T14SG the way that an SBUS servo is registered, however, I was not successful in my attempts and therefore I am contacting you in hopes that you will be able to explain to me what I am doing wrong and how to do it right.

Thank you in advance for your help!

Images of my intended setup:

Hello!

I can't find any method of contacting you other than through the issue tracker..

I have used your schematic and code to build my own SBus to Spektrum converter. It's nearly done (board built, chip programmed) and today I did a quick test to see if it would work with my flight controller (which only works with Spektrum receivers). My flight controller is from a Blade QX3 and the stock receiver for it looks the same as a Spektrum remote receiver.

I want to use my FrSky X8R instead of the Spektrum receiver. This is why I am trying to convert FrSky SBus (same as Futuba?) to Spektrum.

Tonight I will be sniffing the line to see what is output from this board compared to what is output from the stock Spektrum RX.

I just wanted to know if you had tested and finalized the Spektrum output? I imagine most people use PPM instead.

Thanks,
Ryan

Please make a note on this in the description.
Thank you.

Hi Seb,

Sorry to bother you here but can't find any other way to get in touch.

I'm wondering if there is a programming guide anywhere for flashing your code to the Atmel Mega88 chip?

I purchased a version of your board from here: http://www.banggood.com/Converter-from-SBUS-to-PPM-or-Spektrum-Serial-p-1016366.html?rmmds=search

but it seems to be 8ch only - I am looking for configuring for 12ch PPM. I have Windows with AVRDUDE installed and can easily get an Atmel flashing tool. Wondering how I compile and flash.

Many thanks in advance, Paul