I had a problem today setting up wireless trainer on a couple of transmitters. A google search resulted in a helpful page that solved my problem. I have summarised it here so that I know what to do the next time.

Summary:

• When binding the Student transmitter seems to complete the binding process (beeping stops after a few seconds). The Master transmitter does not bind (continues beeping).
  • The transmitters bind OK if the external module on the Master transmitter is switched off.
• Wireless trainer function not working. If I get a trainer connection at all, it drops after a second or two with a "Trainer connection lost" voice message.

Transmitter 1 (Master)

• Radiomaster TX16S Pro Max
• EdgeTX 2.8.4
• Internal multi - I use DSM_RX but the issue happens with any RX protocol.
• External - Namimno 2.4GHz ELRS JR TX Pro Module (ELRS 3.2.1)
  • Packet rate 500MHz

Transmitter 2 (Student)

• Jumper T16 Pro Hall
• EdgeTX 2.8.4
• Internal multi - DSM
• External- off

The problem occurs if the ELRS packet rates are over 250Hz. Setting the packet rate to 250Hz or below solves the problem.

That useful webpage is at https://github.com/EdgeTX/edgetx/issues/3054

My current favourite radio and the one I use 95% of the time is the Jumper T16 pro.

I have 2 of these radios.  One is the T16 pro V2 which has the hall effect gimbals, Internal module and USB-C / Charging module. My older T16 pro has Hall effect gimbals and has been upgraded with the internal module, foldable handle and USB-C / Charging module.

Although the T16 is an excellent radio, they have been plagued from the start with ribbon cable issues.  I am a big fan of Joshua Bardwell's YouTube channel and from one of his videos I discovered that Jumper will supply a set of higher quality ribbon cables for free (you may have to pay postage in some cases) for a transmitter that is having these issues.

To avail of this you need to email This email address is being protected from spambots. You need JavaScript enabled to view it. with a photo of your transmitter showing it's serial number.

I emailed them and they advised me to contact one of their UK suppliers as postage from China was experiencing long delays due to the current Covid-19 crisis. They said that there may be a postage and / or admin charge but there would be no charge to the cables.

I contacted FlyingTech who were very helpful.  There was to be a small admin and postage charge but this was waived as I placed an order with them for other stuff and they just included the cables in the order.

The order arrived very quickly and I proceeded to fit the new cables.  One trick that I found very useful was to wrap a small piece of Blenderm tape around the points of a pair of tweezers which helped grip the ribbon cable tighter.

    Armed - Widget to indicate Safe or Armed if a transmitter switch is in a certain position.
    ModelName - Widget to display the model name in double size text.

Here are some notes about the Jumper T16 transmitter.  Mainly things I've found while using it.

• Need to calibrate 6 position mode buttons when calibrating sticks, pots & sliders. 
• Splash & Background image size: 480 X 272
• Model images need to be 192 pixels wide.  Height does not seem to matter.
• It doesn’t seem to like filenames of more that 6 characters for model images (excluding extension) .
• After binding receiver, need to “Discover sensors” before they can be used for telemetry.
• Some receivers seem to need the protocol sub-type (e.g for DSM, the sub-types are "2 22", "2 11", "X 22", or "X 11") to be set before binding. Sometimes the transmitter picks this up automatically as part of the binding process.