Replies to This Discussion

Permalink Reply by Michael Pursifull on June 2, 2012 at 8:49pm

Please post a close up photo of the cable between the radio and APM and (if 400mhz) the ftdi-radio connection. Thank you.

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Permalink Reply by Steve Steele on June 2, 2012 at 9:58pm

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.

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Permalink Reply by Michael Pursifull on June 5, 2012 at 5:04pm

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. 

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Permalink Reply by Steve Steele on June 2, 2012 at 9:55pm

Post has been updated, any help is appreciated. Thanks Monroe.

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Permalink Reply by Steve Steele on June 3, 2012 at 12:13pm

My connections are exactly like the photo's on the site using the supplied cable. 

Measuring voltage with the meter gave me a reading of 4.61volts on both the 5V pin and the TX pin  and nothing on RX when measured on the APM2 and at the end of the cable when connected.

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3D RoboticsPermalink Reply by Chris Anderson on June 2, 2012 at 10:55pm

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):

If your Remote module settings are not being read, one of three things could be the problem:

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)

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Permalink Reply by Steve Steele on June 3, 2012 at 1:08pm

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. :(

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3D RoboticsPermalink Reply by Chris Anderson on June 3, 2012 at 1:55pm

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. 

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Permalink Reply by Steve Steele on June 3, 2012 at 2:19pm

I've been testing them anywhere from 1 foot -> 6 feet to now at about 15 feet and no change.

I bought these through DIYDRONES store around mid April.  The USB end tx has a date printed on the board of 2012-02-15 and is all green ver1.0 and the air board is purple and green with HM-TRP Breakout v1.1

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Permalink Reply by Jake Stew on June 3, 2012 at 1:36pm

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.

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Permalink Reply by Jake Stew on June 3, 2012 at 2:04pm

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:

• ATI - show radio version
• ATI2 - show board type
• ATI3 - show board frequency
• ATI4 - show board version
• ATI5 - show all user settable EEPROM parameters
• ATI6 - display TDM timing report
• ATI7 - display RSSI signal report
• ATO - exit AT command mode
• ATSn? - display radio parameter number 'n'
• ATSn=X - set radio parameter number 'n' to 'X'
• ATZ - reboot the radio
• AT&W - write current parameters to EEPROM
• AT&F - reset all parameters to factory default
• AT&T=RSSI - enable RSSI debug reporting
• AT&T=TDM - enable TDM debug reporting
• AT&T - disable debug reporting

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.

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ModeratorPermalink Reply by Dean Wynton on June 3, 2012 at 2:51pm

Hey great my favourite subject :)

Yeah Arduino IDE worked for me..

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