Since I received the telemetry unit I can't get them to connect no matter what I try from all the forum posts.
When I try to connect with the APM Planner software ver. 1.191 or 3DR Radio config util. I get the following:
Using the Connection Mavlink button in the top right with proper com port (6 for tx or 8 for rx) and 57600 baud always fails giving "No Heartbeat Packets Received'. When I load the Tx or Rx(with FTDI cable) I have identical values because I have updated the firmware for each.
With both Tx and Rx connected to PC(Win7 x64) I get (.5 second) blinking green lights.
If I connect Tx to PC and Rx to my model(APM2) the Tx has blinking green light (solid for about 3seconds and then two one second blinks) and Rx has blinking green on with bright fast blinking red light.
I have APM2 with 3DR 915Mhz telemetry.
Pic of FTDI connection:
Can anyone suggest some next steps? Thank you.
Post has been updated, any help is appreciated. Also the Rx connected to APM2 is now blinking cause I put the speed back to original 64 from a 48 which I was playing with. Both are now back to the 64.
Thank you Steve. All the cables are correct. I did not doubt your technical abilities by asking, but like spelling errors, we cannot always see our own mistakes. I have more than once attached a cable shifted over one pin to the left and puzzled over it, not seeing it. Yours look picture perfect.
Post has been updated, any help is appreciated. Thanks Monroe.
Steve: make sure both modules have the exact same settings. When you Load Settings (with the air module connected to APM 2 and powered on), it should detect the settings for both modules, like this (I use 99 as my Net ID, but you can use anything you want as long as it's the same for air and ground):
1) You've got it set to different settings
2) It's not getting enough power
3) You've got faulty hardware (in which case, get a RMA from the store you got it from)
I've checked the setting over and over again and even changed them to what I see on your config but still get no change. I measured the voltage out of the APM2 board and got 4.61volts. I'll see if I can disconnect some of my other attached accessories from the board to see if it changes and borrow a friends mulitmeter to confirm volt reading which I assume it won't. I'm thinking I need to return the telemetry units or the APM2 at this point. :(
I don't think they can drown each other out if they're too close.
Steve, where did you get those boards? All the official 3DR boards are all green, as far as I know. The only ones I've seen with purple baseboards were early prototypes.
You need to do some more testing before giving up.
When you connect them to your PC what are you getting from the com port? When you hit +++ is it going to AT command mode? What commands have you tried? Read out all the settings on both modems and compare them.
Have they ever worked or did a setting change / firmware update screw them up? Since you updated the firmware I'm assuming they worked at some point?
You need to make sure all the settings are the same on each radio. Don't trust the MP or config tool. Verify everything manually on each modem, don't trust the remote AT commands.
Yes. Connect the radio and open a terminal. I use "putty". The easiest way is to save a profile for each COM port you'll be using. Under "Session" select "serial" and a speed. Use "COM10" (or whatever) in the "Serial line" field. Now you can name and save these settings for easy setup next time.
To find your com port go into device manager and watch what pops up when you plug in your radio. It's usually under ports.
You can plug in both radios and open two putty com windows and use this to test them. What you type in one window should go over the radio and show up in the other com window.
In any case, type "+++" into the com window. You should get "OK" after a sec. Now you are in AT command mode. You should type some AT commands and see what you get for each radio.
The AT commands available are:
So ATI5 is going to be an important command. Compare each of the radios. You can also try AT&F on both radios.
Just play around for a bit until you get the hang of it. If nothing obvious pops up start posting the results of the commands here and we'll help you figure it out.
Hey great my favourite subject :)
Yeah Arduino IDE worked for me..