This s my first setup with apm2 and 3dr 900 MHz radios.I am in the testing and setup phase and the radio link disconnects randomly every 2-6 min. Some times the green lights starts blinking indicating the radio link is lost, most of the timeout stays green (or reconnects fast enough so I do not see it blinking) . Once green again I need to "re"connect via APM planner.2nd challenge is that I have connectivity via com15 through the mission planner but when I go to the setup page (in APM mission planner) for the 3dr radios, and click on download settings I get an error message that the com port is incorrect.Thanks for your help,Matthias
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To Clarify assuming you have a matched pair, The upgrade option in the mission planner does not help until ONE HAS A FTDI CABLE that will allow the upgrade of the remote radio as well.?!? Or can you Upgrade over the air if the radios talk properly?
2nd Challenge
I can issue AT commands to the Radio all day long but I am not getting an answer. ( echo)
Its' been quite a while that I messed with At commands but ATE1 I believe should turn on echo mode.
I am getting absolutely nothing back from the radio.
My Terminal Output Looks like this ( see below) the command do not appear to be accepted
I am using Putty
BTW the my win 7 ultimate did not recognize the modem/ radio So I installed the FT232R Drivers
The mission Planner was receiving data after that but It behaves different from using a USB Cable.
I do not seem to be able to send commands to the APM with the radios.
Hmmmm ....If I go to the Setup screen for the 3DR radio and click on "Load Settings" the local radio reports Rev 1.5 the Remote is at 1.3 Is that normal ?
It shouldn't lose the link easily. What parameters do you have set?
If you use a terminal, try AT&T=RSSI and look at what is happening with the signal and noise levels. You could also do AT&T=TDM if you want to see low level debug information on the TDM synchronisation.
Replies
Fred ,
Thanks for your answer. I have the com port set to 57600 8N1N (as well as the Ardu Planner ( which I believe may be irrelevant for a software upload)
At this I am looking for some instructions on how to "manually" talk to the boot loader and get the new firmware uploaded.
Or figure out why I have a communication mismatch...
Can anybody help me please?
Update - no success :(
FTDI cable from Sparkfun arrived yesterday.
Double checked pins and connected to my laptop.
The Modem fired up and the APM planned saw it as a local radio wit the old 1.3 software.
I pressed the upload firmware button. It connected erased the firmware and ended with
"Update Failed SYNC LOST"
Fail: lost Synchronization with Boot loader.
The red LED stays on indicating boot loader mode.
I tried 9600 baud as well as the 57600 with the same results.
Suggestion welcome
Matthias
TTL cable was ordered yesterday from Sparkfun I assume once I have the radios on the same rev my issues will go away.
Thanks you for everybody's help.
I'll keep you posted!
Matthias
+++ that will be helpful l! Thanks! I'll try that when I get home ...
Trige,
OK so I reread the documentation and some other posts. and I conclude that both radios need to be at the same rev level.
I received an unmatched pair.of Radios :( and in order to fix that I need an "FTDI" cable.
(Or I could make my own can make my own Serial Cable).
Will This cable work:
https://store.diydrones.com/Remzibi_OSD_cable_p/ttl-4pinftdi.htm
Or Can You recommend a better cable?
To Clarify assuming you have a matched pair, The upgrade option in the mission planner does not help until ONE HAS A FTDI CABLE that will allow the upgrade of the remote radio as well.?!?
Or can you Upgrade over the air if the radios talk properly?
2nd Challenge
I can issue AT commands to the Radio all day long but I am not getting an answer. ( echo)
Its' been quite a while that I messed with At commands but ATE1 I believe should turn on echo mode.
I am getting absolutely nothing back from the radio.
Thanks for you help...
Matthias
My Terminal Output Looks like this ( see below) the command do not appear to be accepted
I am using Putty
BTW the my win 7 ultimate did not recognize the modem/ radio So I installed the FT232R Drivers
The mission Planner was receiving data after that but It behaves different from using a USB Cable.
I do not seem to be able to send commands to the APM with the radios.
Hmmmm ....If I go to the Setup screen for the 3DR radio and click on "Load Settings" the local radio reports Rev 1.5 the Remote is at 1.3 Is that normal ?
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Hi Matthias,
It shouldn't lose the link easily. What parameters do you have set?
If you use a terminal, try AT&T=RSSI and look at what is happening with the signal and noise levels. You could also do AT&T=TDM if you want to see low level debug information on the TDM synchronisation.
Cheers, Tridge