I know there are many threads on the subject and I think I have gone through them all without being able to solve my problem. I can’t get my TX16s to talk to orange cube+ via crossfire. I just installed EdgeTx V.2.8.4 and Mission Planner is V.1.3.80 and ArduCopter V. 4.3.7. The crossfire diversity is in the Telemetry 1 port and it is paired with the radio and has solid green. I have made these changes in Mission Planner: Serial1_ Protocol = 23 and RSSI_TYBE = 3 and RC_OPTIONS = 8 but still no connection to FC. I’m on day 3 and I’m getting pretty frustrated getting nowhere. I’m really hoping someone has the same setup or someone can point me in the right direction. All the best 
Post your full parameter list
RC_OPTIONS should be bit 8 = 256
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And check Rx - Tx and Tx - Rx
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Thank you so much for looking at the list. I really appreciate it! I’m totally new to ardupilot. Coming from Betaflight, Inav and Mikrokopter.
You need to have only one serial protocol set to 23