openrcforums

mstrens - I wanted to update you because you've helped me troubleshoot so much. I ended up writing some code on an Arduino Mega to decode the DBUS (and troubleshoot using multiple serial ports) so I can now use it on a mini or custom board. It's not quite as elegant as yours because it uses all ardu...

Thank you for all the information, it is helpful. Please take care that Arduino reads the Tx pin only at start up. So if you change the level on the Tx pin while Arduino is running, it will not detect it. Please take care not to tie Tx pin to ground while programming the Arduino. So the sequence sho...

I am still having some issues. The LED is blinking slowly (once per second), and there is a PWM signal on the output pins but the signal is always 10% duty cycle high and does not change with the radio inputs. I reset the arduino with the Lightbridge off (no SBUS signal) and when I turn the Lightbri...

Yes, you are right! Turning off debug mode the LED is now blinking slowly, I will check the PWM outputs when I get the scope set up again. Thank you!

Sorry about that, I just edited my post because I did the bytes wrong, here is the bytes I got including the start/parity/stop bits:

Okay, you were right, I did not have the non-inverting signal to pin 8. Here is what I get now: Commenced device-under-test debugging! start of check for CPPM End of check for CPPM; type =2 SBUS_Error: 0 ch1: 24240Servo1: 15760 SBUS_Error: 0 ch1: 24240Servo1: 15760 SBUS_Error: 0 ch1: 24240Servo1: 15...

Okay, I've got debug mode set up now, It says: Commenced device-under-test debugging! start of check for CPPM Then nothing else happens I'm looking at the signal on a scope and it appears there are frames every 14ms, that are 3ms long. I've attached a scope capture, unfortunately I don't have a logi...

Thanks for the work and sharing your code! I'm trying to get this working with a DJI Lightbridge, with DBUS, which is supposed to be the same or similar to SBUS. I have it connected to the Rx pin with an inverter but the LED stays off. I've tried with both an UNO (328p) and 5V mini (168p). The DBUS ...

Thanks, I managed to get it working with full telemetry from arducopter doing the things I said above and using the Frsky firmware and module

You have to set the range of A1 and A2. For example if you use the internal voltage sensor for A1 you have to set it to 13.2V. It's working because you have RSSI ;) And remember: never put higher voltages then 3.3V on A1 or A2. Thanks for the quick response! It seems I got that working although I w...

Sorry guys, photobucket is absolutely refusing to rotate my pictures. Quick update- I changed the numbers to on the left from 0.00 to 5.00 and now I am getting values from the Rx. So I guess that means all the mods on my Tx are working and I can close 'er up? I just need to figure out how to get jdr...

Hi all, I did a ton of reading before buying parts and modding and I can't figure out what step I'm missing. I installed the DJT module and have the D8R-IIplus receiver. I went ahead and wired it up just like this: http://openrcforums.com/wiki/index.php/File:FrSky_DJT_%2B_FrSky_Lite.jpg And moved th...

I spent all night reading about all of your genius mods and I think I've come to a point I'm ready to order parts... I would like to upgrade to a FrSky RF system so that I have Failsafe mode with telemetry and use the Arducopter telemetry to display on the 9x LCD. So I guess first I need the FrSky T...