[darkdave]

This looks like an ebay style website, and you say they actually manufacture the things they sell?

[darkdave]

Looks like your Oplink Mini do not transmit as expected.
Be sure all antenna side is ok, open the case and inspect solder joins.

The prevalent issue of the missing inductor: That is on the Ground Control Station side correct? The Oplink on the ground?

Are there any hardware faults on the Revolution board it self or the Oplink mini Air?

Also has anyone checked to see if the Oplink mini GROUND has the same problem? If not it might be a good idea to only buy Oplink Mini Ground instead of the standard Oplink.

[darkdave]

Here is the video with the OPLink issue.

I can't see it, youtube says the video is private!!

Anyways I have range problems too but I opened up my standard oplink and I do see what looks like a blueish component bridging the 2 solder joints where you guys say the coil is ment to be, I guess that means my standard oplink has a coil. Could it be that the problem is also somewhat common also on the drone side of things ie. the flight controller not receiving because it's also missing some coil or other component?

[zukenj]

I never say they manufacture it. I bought it from them


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[darkdave]

I never say they manufacture it. I bought it from them


Sent from my iPad using Tapatalk

Can you tell us the name of the seller?

[zukenj]

http://us.banggood.com/Wholesale-Warehouse-OpenPilot-OPLINK-MINI-CC3D-REVO-Universal-Transceiver-TX-RX-Module-Integrating-Remote-Controller-wp-Usa-1000081.html

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[zukenj]

That is the one i bought

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[darkdave]

That is the one i bought

Any barometer problems or telemetry (433mhz) reception issues from this seller?

[zukenj]

On the OPLink yes, and they replace it. The new board works great.

[darkdave]

On the OPLink yes, and they replace it. The new board works great.

Who is the seller? Do you know the handle or name of the seller from banggood? Do sellers have a unique identity just like in Ebay?

[kennyevo]

Guys, is it possible to tell which side is faulty? (oplink or revo)
I've checked the signal level and it drops after 10-15meters and completely lost after 30m.
First I plugged in my revo and walked away with the oplink powered, then plugged in my oplink and walked away with the quad. Both had the same result.

Here's a pic of my oplink: https://drive.google.com/open?id=0B_2MdV3di_UMOXJxWmVYSTZoM2s

[hwh]

I would bet that one is bad, every one I purchased that has the chip id ground off was bad.  The RFM22b board on that oplink isn't a genuine one made by Hope RF, it's a clone.  All of the clone RFM22b boards I had were off frequency.  I fixed the oplinks by replacing the RFM22b and they worked fine after that.

As for testing which end has low power f5soh explained it in another thread:

...You can test connecting computer to Oplink, next to Revo and compare the Rssi level on both sides.
Set same power on both sides, maintain same position and you can see which device is wrong.
When Revo is connected to computer you can power the oplink with a usb cable plugged in phone charger module.

[kennyevo]

So, I did some testing again:

Oplink connected to desktop pc, shows: -127
Revo connected to laptop, shows: -40~-55

After powering the quad with the battery, they shows the same values: ~ -40 (about 3meters away)

The oplink shows fix -55, the revo is jumping between -39 and -55

The flight data on the oplink side doesn't update. (i think that's why the -55 signal level is fixed) <- doesn't update if both sides are connected to gcs..

If I power up the revo then the oplink, the oplink doesn't show the signal level :S

Does that mean that my oplink is dead?

EDIT:

New values:

Oplink connected to laptop, revo about 15-20meters away, shows about -61

Revo connected to laptop, oplink about 15-20meters away, shows about -52

These are quite low values for such a short distance, or not?

[zukenj]

It may refer to the same test (the Modem in the Revo and the OPLink are the same, so ether can be Coordinator), the way I did it was:

• Power the Revo, USB connected to GCS and configure it for power and as Coordinator, save and re-boot the Revo.        Take note on the Coordinator number, unplug from USB.
• Plug the OPLink, and uncheck the Coordinator box, save and reboot the OPLink, input the Coordinator number from Revo, save and unplug from USB.
• Power the OPLink using a USB Phone charger.
• Plug the Revo to the PC running GCS, move around and check the signal.

Do the same in an apposite way, move around and check the signal.

That will tell you witch one is the one that is failing.

I would bet that one is bad, every one I purchased that has the chip id ground off was bad.  The RFM22b board on that oplink isn't a genuine one made by Hope RF, it's a clone.  All of the clone RFM22b boards I had were off frequency.  I fixed the oplinks by replacing the RFM22b and they worked fine after that.

As for testing which end has low power f5soh explained it in another thread:

...You can test connecting computer to Oplink, next to Revo and compare the Rssi level on both sides.
Set same power on both sides, maintain same position and you can see which device is wrong.
When Revo is connected to computer you can power the oplink with a usb cable plugged in phone charger module.

[kennyevo]

It may refer to the same test (the Modem in the Revo and the OPLink are the same, so ether can be Coordinator), the way I did it was:

• Power the Revo, USB connected to GCS and configure it for power and as Coordinator, save and re-boot the Revo.        Take note on the Coordinator number, unplug from USB.
• Plug the OPLink, and uncheck the Coordinator box, save and reboot the OPLink, input the Coordinator number from Revo, save and unplug from USB.
• Power the OPLink using a USB Phone charger.
• Plug the Revo to the PC running GCS, move around and check the signal.

Do the same in an apposite way, move around and check the signal.

That will tell you witch one is the one that is failing.

If I set the revo as the coordinator it doesn't show anything on the oplink tab, but it shows -40 if I plug the oplink into the pc.
If the oplink is the coordinator, both side shows around -40 for signal.

Does that mean that the revo is the dead one?