Im sure the other cliff will have an idea as usual
I am experiencing some problems with my oplink mini, basically I considered that the one that came with my board was damaged cause I could never get a coneccting after updating to version 15.9 - then 16.9 and still not working. I bought a second one, it worked but as soon as I started changing the settings, it would never connect to the receiver again.
I found the other cliff answers with the rescue firmware, I did install it, then the erase and upgrade, out of 10 times I get the oplink connecting to the receiver ( revolution board) 2 or three times, and many times the connection bar goes blue and off, and the status blinks connected and disconnected.
when I get fixed connection, I can see telemetry as well as load OAV settings wirelless, but then I change speed lets say on the oplink, done, I can never use the connection again. I hope my explanation is well detailed, and maybe someone has a similar issue and knows how to fix it. One extra detail, when I flash new firmware and start changing from dissble to enable channels power etc, the first time I click save the button goes grey and fixes the green check, after a few changes ( whe the problem happen) although I restart the oplink and see the changes stick, the save button behaves funny, it is as if it is just clicking and back but this long saving from before is not happening. thank you.
About using the Oplink as ppm, I did it with the turnigy 9X .. I also made an arduino controller to PPM and used the oplink, and it also worked well ( when my oplink worked).