https://www.xtremepowersystems.net/forum/ Tue, 14 Apr 2026 15:29:12 +0000 MyBB https://www.xtremepowersystems.net/forum/showthread.php?tid=192 Tue, 24 Feb 2026 18:25:22 -0500 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=192
Only thing, when I press the programming button the led never goes off, it just blinks on and off green.  Same behavior with the X10+v2.

It works as described in the manual when the receiver and X10 are configured for Extreme protocol, but not SBUS.

Am I missing something?

Thanks,

Paul]]>
Only thing, when I press the programming button the led never goes off, it just blinks on and off green.  Same behavior with the X10+v2.

It works as described in the manual when the receiver and X10 are configured for Extreme protocol, but not SBUS.

Am I missing something?

Thanks,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=191 Sat, 21 Feb 2026 17:33:29 -0500 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=191
It had been a long time and I hope you and your family are well.

I have been working with a new ELRS system.  I'm using a RadioMaster TX15 transmitter and several RadioMaster receivers.  I got an 8-channel ER8GV receiver that I want to put into my sailplane that currently has an RFU and X10+v1.

To begin I configured an X10+v2 to take SBUS as its input.

Then I configured one of the PWM servo outputs on the ER8GV receiver to be a serial port and to output SBUS.  I connected it all up and powered on and it worked.

The X10+v2 green led flickered about three times per second.

I got feedback from the RCGroups ELRS forum that the SBUS errors are there because ELRS periodically sends back telemetry packets in time slots normally occupied by control packets.  My system's overall packet rate is 100Hz for 10ms frames and my telemetry ratio is 1:32.  That means it sends about three telemetry packets every second.  That could explain the three led flickers pre second.

My ELRS frame rate is set to 10ms and the receiver's PWM outputs are set to 50Hz.  The ELRS system therefore sends every other control packet to the PWM outputs.

The setup and servos seem to work, so I plan to try it out at the airfield soon.

Can you think of any reason I shouldn't fly it?

Thanks,

Paul

p.s.  Will your proposed X10+v3 take CRSF as an input?]]>
It had been a long time and I hope you and your family are well.

I have been working with a new ELRS system.  I'm using a RadioMaster TX15 transmitter and several RadioMaster receivers.  I got an 8-channel ER8GV receiver that I want to put into my sailplane that currently has an RFU and X10+v1.

To begin I configured an X10+v2 to take SBUS as its input.

Then I configured one of the PWM servo outputs on the ER8GV receiver to be a serial port and to output SBUS.  I connected it all up and powered on and it worked.

The X10+v2 green led flickered about three times per second.

I got feedback from the RCGroups ELRS forum that the SBUS errors are there because ELRS periodically sends back telemetry packets in time slots normally occupied by control packets.  My system's overall packet rate is 100Hz for 10ms frames and my telemetry ratio is 1:32.  That means it sends about three telemetry packets every second.  That could explain the three led flickers pre second.

My ELRS frame rate is set to 10ms and the receiver's PWM outputs are set to 50Hz.  The ELRS system therefore sends every other control packet to the PWM outputs.

The setup and servos seem to work, so I plan to try it out at the airfield soon.

Can you think of any reason I shouldn't fly it?

Thanks,

Paul

p.s.  Will your proposed X10+v3 take CRSF as an input?]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=180 Tue, 09 Dec 2025 11:15:58 -0500 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=180
I hope you and your family are well.

On the XPS website, the X10+v2 includes SBUS and SBUS2 as supported protocols.  However, in the X10+v2 manual, SBUS-2 is not listed as an input protocol that can be selected.

If I connect a Futaba SBUS-2 receiver to an X10+v2, will it work like regular SBUS, only without the telemetry part?

Thanks,

Paul]]>
I hope you and your family are well.

On the XPS website, the X10+v2 includes SBUS and SBUS2 as supported protocols.  However, in the X10+v2 manual, SBUS-2 is not listed as an input protocol that can be selected.

If I connect a Futaba SBUS-2 receiver to an X10+v2, will it work like regular SBUS, only without the telemetry part?

Thanks,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=162 Tue, 24 Jun 2025 12:50:36 -0400 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=162
I configure my Futaba 9C transmitter to communicate with an XPS-F1 transmitter module using PPM.  I configure my Taranis to communicate with an XPS-J1 transmitter module using XJT-D16.  In both cases the receivers communicate with their respective X10+s using Xtreme protocol.

Since both arrangements work perfectly, then I reckon that the Xtreme protocol can adapt to the frame rates and data content of either XJT-D16 or PPM.  And, the X10+ PWM output to the servos comes at the same frame rate that the transmitter sends frames to the XPS transmitter module (either XJT-D16 at 18ms or PPM at 22.5ms).

Is this correct?  Thanks,

Paul]]>
I configure my Futaba 9C transmitter to communicate with an XPS-F1 transmitter module using PPM.  I configure my Taranis to communicate with an XPS-J1 transmitter module using XJT-D16.  In both cases the receivers communicate with their respective X10+s using Xtreme protocol.

Since both arrangements work perfectly, then I reckon that the Xtreme protocol can adapt to the frame rates and data content of either XJT-D16 or PPM.  And, the X10+ PWM output to the servos comes at the same frame rate that the transmitter sends frames to the XPS transmitter module (either XJT-D16 at 18ms or PPM at 22.5ms).

Is this correct?  Thanks,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=126 Sun, 22 Sep 2024 16:27:41 -0400 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=126
I "learned" (just internet so I do not know how reliable the information is) that Futaba's SBUS uses 3.3v or 5v to represent a zero logic value in the bitstream and ground as a logic one in the bitstream.

FrSky's SBUS uses the opposite:  They have ground as a zero value and 3.3v or 5v as the one value.

In my experiment where I fed SBUS to the X10+v2 from an FrSky receiver, the old analog servo did not work, but the digital servo worked.  When I fed the X10+v2 SBUS from a Futaba receiver, both the old analog and the digital servo worked.

We concluded that the frame rate used by FrSky was too fast for the analog servo.  Could it also have something to do with the FrSky SBUS voltages being opposite to that of the Futaba standard SBUS signal?

I had the X10+v2 configured to accept "Futaba SBUS" as the input (not the inverted choice).

Thanks for your opinion,

Paul]]>
I "learned" (just internet so I do not know how reliable the information is) that Futaba's SBUS uses 3.3v or 5v to represent a zero logic value in the bitstream and ground as a logic one in the bitstream.

FrSky's SBUS uses the opposite:  They have ground as a zero value and 3.3v or 5v as the one value.

In my experiment where I fed SBUS to the X10+v2 from an FrSky receiver, the old analog servo did not work, but the digital servo worked.  When I fed the X10+v2 SBUS from a Futaba receiver, both the old analog and the digital servo worked.

We concluded that the frame rate used by FrSky was too fast for the analog servo.  Could it also have something to do with the FrSky SBUS voltages being opposite to that of the Futaba standard SBUS signal?

I had the X10+v2 configured to accept "Futaba SBUS" as the input (not the inverted choice).

Thanks for your opinion,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=125 Thu, 19 Sep 2024 15:25:19 -0400 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=125
I connected the SBUS output of the Futaba receiver to the X10+v2.

When I powered up the transmitter and receiver, I immediately got a green light on the X10+v2.  I connected the old S148 servo and it worked perfectly!  (It didn't work with the FrSky SBUS receiver).  The digital servos, as expected, also worked perfectly. 

The Transmitter is not even a Futaba transmitter, it is an OpenTx set with one of those 4in1 chipsets that includes the S-FHSS option.

I suppose that the S-FHSS protocol sent by the transmitter, in conjunction with the Futaba receiver and its SBUS link to the X10+v2 results in a frame rate that the S148 can handle.

I'll bet the FrSky SBUS uses 9ms frames and they are too fast for the S148.  The Futaba SBUS receiver probably uses 14ms frames and the S148 can accept that.

My conclusion is that I have solution if my XPS-J1 transmitter module dies and I can no longer use my XPS receivers - I can use Futaba SBUS receivers with X10+v2s (or v3s and beyond) with my airplanes that still have analog servos.]]>
I connected the SBUS output of the Futaba receiver to the X10+v2.

When I powered up the transmitter and receiver, I immediately got a green light on the X10+v2.  I connected the old S148 servo and it worked perfectly!  (It didn't work with the FrSky SBUS receiver).  The digital servos, as expected, also worked perfectly. 

The Transmitter is not even a Futaba transmitter, it is an OpenTx set with one of those 4in1 chipsets that includes the S-FHSS option.

I suppose that the S-FHSS protocol sent by the transmitter, in conjunction with the Futaba receiver and its SBUS link to the X10+v2 results in a frame rate that the S148 can handle.

I'll bet the FrSky SBUS uses 9ms frames and they are too fast for the S148.  The Futaba SBUS receiver probably uses 14ms frames and the S148 can accept that.

My conclusion is that I have solution if my XPS-J1 transmitter module dies and I can no longer use my XPS receivers - I can use Futaba SBUS receivers with X10+v2s (or v3s and beyond) with my airplanes that still have analog servos.]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=124 Wed, 18 Sep 2024 17:09:22 -0400 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=124
I hope this note finds you and your family well.

I did an experiment where I used an FrSky "SBUS output" receiver connected to an X10+v2.  I configured the X10+v2 to accept an SBUS input.  Then I bound the receiver to my Taranis using its internal radio's D16 protocol.  There was no XPS transmitter module involved in this test.

There were interesting results:

With the transmitter, X10+v2, and receiver powered up, the X10+v2 showed a steady green led which indicated a good connection to the receiver (and transmitter).

An old Futaba S148 servo ran when connected to the X10+v2, but it ran a little notchy.  It also vibrated and hummed while sitting idle.  I reckoned that being a 25-year old analog servo, it perhaps had a problem with the SBUS frame rate.

Then I tried a relatively modern digital servo, an MKS DS95, and it worked very fast and very smoothly and without any vibration or humming.

Can you speculate why the S148 servo did not work well with the setup?

Thank you,

Paul]]>
I hope this note finds you and your family well.

I did an experiment where I used an FrSky "SBUS output" receiver connected to an X10+v2.  I configured the X10+v2 to accept an SBUS input.  Then I bound the receiver to my Taranis using its internal radio's D16 protocol.  There was no XPS transmitter module involved in this test.

There were interesting results:

With the transmitter, X10+v2, and receiver powered up, the X10+v2 showed a steady green led which indicated a good connection to the receiver (and transmitter).

An old Futaba S148 servo ran when connected to the X10+v2, but it ran a little notchy.  It also vibrated and hummed while sitting idle.  I reckoned that being a 25-year old analog servo, it perhaps had a problem with the SBUS frame rate.

Then I tried a relatively modern digital servo, an MKS DS95, and it worked very fast and very smoothly and without any vibration or humming.

Can you speculate why the S148 servo did not work well with the setup?

Thank you,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=63 Fri, 09 Sep 2022 11:48:38 -0400 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=63
I hope you and you family are well.

I had a failsafe event today with an airplane equipped with an RFU and an X10+ V2. 

I was flying through a stall turn about 200 feet away.  The airplane yawed to the left over the top and was flying downward with the top of the airplane facing me.  The throttle was as a low-to-medium setting at the time.  I started to pull out when the plane pitched up and continued until it was facing nose high, like it was trying to fly a loop.  I did not command that additional up elevator, I was just going to level out.  I recovered airspeed and continued flying it.  It was only a momentary event, lasting a second or two.  I felt that something went wrong so I immediately landed safely.

With the airplane safely on the ground I remembered that my failsafe commands are:

   THROTTLE OFF and
   ELEVATOR UP

Since the throttle was relatively low during the maneuver I did not notice that the throttle may have gone all the way off, but I did experience the up elevator.

I reckon that it was not a power problem because the up elevator went into effect.

My theory was that the RFU antennas were blocked by the airplane's battery and wiring at the "perfect" angle.  I verified it by taping the "range test" button down and walking far enough away to cause a failsafe.  Than I moved in a few steps to where the controls were solid.  Then I oriented the airplane around to various orientations relative to the transmitter (which was sitting still on a chair) and found an angle that caused the system to go into failsafe.  The angle was similar the orientation at the time of the stall turn maneuver.

Only thing - now this gets eve weirder:  My failsafe was set up to put the elevator DOWN, not UP!  I must have not set the failsafe again after putting the X10 into the new plane.  But I felt an uncommanded UP elevator control.  I have no good explanation.  Maybe power?  Maybe the flight battery shifted aft while the plane was going up into the stall turn?

I do not like my current RFU antenna installation because while both antenna elements are oriented 90 degrees to each other, they are both situated horizontally (picture attached).  I reckon with both horizontal, they both could be blocked in the same geometric plane.

I will relocate the RFU and its antenna elements so that one element faces downward and the other faces in a horizontal direction.

Do you agree that this was not a power problem because the servo moved the the failsafe position?  (I'm not ruling it out.)  The airplane uses a Castle BEC regulator set to 5.2 volts.  How about the horizontal and vertical antenna orientation?

Thank you,

Paul

  plane.JPG (Size: 72.81 KB / Downloads: 7) ]]>
I hope you and you family are well.

I had a failsafe event today with an airplane equipped with an RFU and an X10+ V2. 

I was flying through a stall turn about 200 feet away.  The airplane yawed to the left over the top and was flying downward with the top of the airplane facing me.  The throttle was as a low-to-medium setting at the time.  I started to pull out when the plane pitched up and continued until it was facing nose high, like it was trying to fly a loop.  I did not command that additional up elevator, I was just going to level out.  I recovered airspeed and continued flying it.  It was only a momentary event, lasting a second or two.  I felt that something went wrong so I immediately landed safely.

With the airplane safely on the ground I remembered that my failsafe commands are:

   THROTTLE OFF and
   ELEVATOR UP

Since the throttle was relatively low during the maneuver I did not notice that the throttle may have gone all the way off, but I did experience the up elevator.

I reckon that it was not a power problem because the up elevator went into effect.

My theory was that the RFU antennas were blocked by the airplane's battery and wiring at the "perfect" angle.  I verified it by taping the "range test" button down and walking far enough away to cause a failsafe.  Than I moved in a few steps to where the controls were solid.  Then I oriented the airplane around to various orientations relative to the transmitter (which was sitting still on a chair) and found an angle that caused the system to go into failsafe.  The angle was similar the orientation at the time of the stall turn maneuver.

Only thing - now this gets eve weirder:  My failsafe was set up to put the elevator DOWN, not UP!  I must have not set the failsafe again after putting the X10 into the new plane.  But I felt an uncommanded UP elevator control.  I have no good explanation.  Maybe power?  Maybe the flight battery shifted aft while the plane was going up into the stall turn?

I do not like my current RFU antenna installation because while both antenna elements are oriented 90 degrees to each other, they are both situated horizontally (picture attached).  I reckon with both horizontal, they both could be blocked in the same geometric plane.

I will relocate the RFU and its antenna elements so that one element faces downward and the other faces in a horizontal direction.

Do you agree that this was not a power problem because the servo moved the the failsafe position?  (I'm not ruling it out.)  The airplane uses a Castle BEC regulator set to 5.2 volts.  How about the horizontal and vertical antenna orientation?

Thank you,

Paul

  plane.JPG (Size: 72.81 KB / Downloads: 7) ]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=53 Wed, 05 Jan 2022 14:19:11 -0500 flyingw]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=53
I configured a DragonLink receiver to output SBUS and connected it to an X10.

The system connects, but the LED on the X10 flickers steadily at a fast rate, something 10 per second, maybe faster.

A servo connected to the X10 moves as expected on the correct channel, but it moves in a slightly "ratchety" fashion.

Any ideas?  I tried inverted SBUS on the X10 but it did not connect at all.

Thanks,

Paul]]>
I configured a DragonLink receiver to output SBUS and connected it to an X10.

The system connects, but the LED on the X10 flickers steadily at a fast rate, something 10 per second, maybe faster.

A servo connected to the X10 moves as expected on the correct channel, but it moves in a slightly "ratchety" fashion.

Any ideas?  I tried inverted SBUS on the X10 but it did not connect at all.

Thanks,

Paul]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=27 Mon, 17 May 2021 21:06:01 -0400 Robert]]> https://www.xtremepowersystems.net/forum/showthread.php?tid=27
Thank you in advance.

Regards,

Robert]]>
Thank you in advance.

Regards,

Robert]]>