3DR 433 Mhz Radios not working
Hi,
I have almost the same problem as droter and kbcopter in this forum. My observations:
One of the 3DR radios (433 mhz vers.) seems to be ok but I am not sure. It flashes the green LED, but the red LED is NOT flashing upon power up. It seems to respond to the 3DR radio config tool - i.e. it is able to load settings, save settings, and upload firmware. The green LED is blinking and the red LED is reacting to the config tool when an AT command is sent to it. However, it cannot seem to connect to APM Planner 1.1.88 and has an error message of "No Heartbeat packets received". When I try the config in APM Planner I am able to load settings, but I cannot upload firmware giving an error message unlike using the 3DR Radio config software. This radio's noise level is almost the same level as the RSSI level. It fluctuates but on the average its the same on the 3DR config tool. Another issue, it does not save new settings (e.g. tried tx = 20), and loads previous settings.
The other 3DR radio is solid green LED and flashing red LED (1 sec. interval) on power up. 3DR config tool cannot connect at load settings and save setings giving an error message of "Failed to enter command mode". With the upload firmware button it gives an error of " Failed to identify Radio". However, if I short the CTS and GND pins before power up as mentiond on the 3DR page, this radio goes solid red (correctly entering bootloader mode) and I am able to upload firmware. The red LED also seems to be reacting properly to the upload. Unfortunately, after flashing it goes back to solid green LED.
It seems that the radios I got are bad too.
Help!
Replies to This Discussion
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Permalink Reply by vitaly on -
USING HYPERTERMINAL
THE RADIO LINK IS ESTABLISHED I GET THIS
€€›`€€€` €f0À€Ãøþ€“`€€xf€þ€³`àx ø€€3`€Ìàþ€€³`€€˜ð€€3`€þøÏ
3`€€fŒàø3`€€ž`Ì€3`€€€3`€øø€™`€xðž€fÀ€à†æàf0À€žæ枀›`
€€ƒ€€“`€€þ0 À`Ì`††øæžf0À€`ðø†˜†€fÀ€ø†™˜†€€3`€€ófóÀÌ€æ†æ†æ†æ
†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ†æ<fx3ø€€“`
˜ææ€3`€ø`†ø3`€€` à˜3`˜øþø˜àþ3`€~æð€€fÀ€æ˜þþIF I DISCONNECT THE REMOTE RADIO IT STOPS SO THE LINK IS OK APM DOES NOT RECOGNISE THE RADIO TYPE ????
HYPERTEMINAL PROVES THE LINK IS ESTABLISHED AM I WRONG ?????
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Permalink Reply by Serg Abad on
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Hi. Besides the suspect being a 'bad' radio (i.e. defective radio). Try this:
1. Connect good radio to Mission planner and upload its parameters.
2. Rmove good radio and connect 'bad' radio.
3. Download the parameters from the good radio to the bad radio.
4. Then check that they have the same frequencies. Otherwise reset then to the same band of frequencies.
5. I found some of the 3DR radios 'misbehave' this way or have different frequencies so they do not communicate.
Good luck.
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