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Geofrancis wrote:i dont have any problems running 16mhz at 3.3v.

Base on the technical specs for the Arduino Pro Mini, the 3.3V version has an 8 MHz external resonator.

Clock Speed: 8 MHz (3.3V versions) or 16 MHz (5V versions)

On the topic of baud settings, I thought I would add this special note for anyone considering using the 3.3V Arduino Pro Mini instead of the 5V version. I didn't see any reference to the 3.3V version elsewhere on this thread, so I gather most are using 5V. I needed to use the 3.3V version because I ...

I went two commits back on APM_Mavlink_to_FrSky, and the problem went away. Might also work with one commit back, didn't try. Out flying now with all the Mavlink telemetry, and it's great!

It works! I set UCSR0A = 2 in initUart, and now my receiver receives MavLink data. Thank you! This is a good option for those with a 3.3v Arduino Pro Mini. Now for the real mystery, and I'm way out of my element on this one... When I connect the X8R S.port to pin 5 on my Pro Mini, the telemetry work...

Aha, your post is pointing me in the right direction! Thank you! I think I might know what is going on. Your initUart function assumes the 5V Arduino Pro Mini, which uses an ATmega328 and a 16 MHz clock. I am using the 3.3V Pro Mini variant for compatibility with the 3.3V signals on my flight comput...

Hmm, the heartbeat message isn't getting through to the Arduino correctly. I've confirmed the heartbeat counter never increments up. I set up a simple test, and sent the same message over at 1 Hz: FE 9 38 1 1 0 0 0 0 0 2 3 51 5 3 4E 84 If I put a simple sketch on the Arduino to echo back the data, e...

Hi Mike, yes it is non-inverted. Just standard UART output at 3.3v. I just did a capture on the 57600 baud telemetry output from my flight computer, and saw a stream of 1 Hz packets like: FE 9 37 1 1 0 0 0 0 0 2 3 51 5 3 4E 84 FE 9 38 1 1 0 0 0 0 0 2 3 51 5 3 AA 1B FE 9 39 1 1 0 0 0 0 0 2 3 51 5 3 4...

Thanks Mike, looking into it. There is 57600 baud data streaming off the port, though need to parse it to verify it is indeed MAVLINK data. My setup is a little different than most, as I'm running Arducopter 3.4 on a Beaglebone. Always requires a little bit of extra fiddling...

Hi Mike, I did not know there was communication from the Arduino to the flight computer. Sadly though, it does not appear to work even with the Tx pin connected. I am assuming communication to the S.port is okay since when I remove the connection to pin 5, the telemetry screen starts flashing NODATA...

I uploaded the Mavlink to FrSky software to the Pro Mini, connected to my flight computer Telemetry Tx and ground to the Arduino Rx and ground, connected Arduino Pin 5 to S.port signal (and ground to ground), and grounded Pin 2. On the Arducopter telemetry screen, it looks to me like the X8R receive...

Hi Steven, It would really be a shame to discontinue this product after a run of only a year! I just installed my kit over the weekend, and I am super impressed. Everything was really high quality, and just fit. Really well thought out. Updating the firmware was a breeze too, and the ersky9x easy to...

Ha ha, got it! Need to learn your file naming conventions!

Thanks Mike! Will do. I would never have thought to download "ersky9xProvR219w_multiDSM-2.zip", as I have the 9XTreme, not Pro. But I see now that you have all the roms included in the zip file.

Just received and installed my 9Xtreme and XJT module into my radio, and just a general comment that the 9Xtreme is a FANTASTIC kit. I've also been learning the ins and outs of ersky9x while getting my radio set up, and am very impressed with this software. I didn't know what I was missing with the ...

Fantastic thread! I'm halfway through it now, and it looks exactly what I'm looking for. I like that it only requires the Pro Mini. The Teensy seems overkill to me. I have a drawer full of Nanos, but from what I gather, the Mini is the better solution. I have one on order already. And an XJT. This i...

Well that settles it. Thanks for the quick answer, Mike! Wow, are those ads misleading. It looks like if I want anything more than RSSI and receiver voltage out of the X8R telemetry, I had better invest in an XJT module. Related question... if I do decide to pick up the XJT module, will I also be ab...

I am currently flying a 9X transmitter with a FrSky DJT module and an X8R receiver bound in D8 mode. I've just placed an order for a 9Xtreme board, because it will allow me to finally get telemetry on my transmitter, and it just seems like a really cool upgrade. It's currently on its way on a slow b...