E-TUBE PROJECT Cyclist 4+

As with other reviews, using this was an exercise in frustration. Connected to my di2 easily enough but then fell over when trying to update firmware. Followed recommended steps to try and get the thing to update again but after several attempts, I still got the error and it looked like my di2 was bricked. No response from the junction A box, couldn’t shift gears, nothing.

In desperation I downloaded the tablet version of the app on my iPad Pro. I connected to the unit and this time all the firmware updates went through smoothly.

What I discovered in the process is that it’s really important to disconnect from Bluetooth LE when you’re done using the app. If you don’t, it looks like your gears are dead because the di2 system doesn’t respond. Once I disconnected, I was able to get the gears working again.

To help you out: if you have firmware updates issues, then update from a computer using the Di2 charging brick with the E-TUBE software on your computer. You can identify what component has bricked and update it with all the other cables disconnected.

For example, if the rear derailleur is bricked then disconnect everything else except the battery and cable from the battery to the rear derailleur. The system will then only recognise the rear derailleur and battery and update successfully. The reason this sometimes happens is due to unseated cable connections, mix and match parts or a dodgy wireless Bluetooth transmitter. In order to prevent this, if you see a wireless update for the Bluetooth module available on the bike then disconnect everything except the battery and Bluetooth module and isolate it in isolation.

How do I know this? I read the manual.
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Works fine for me. Judging by the poor grammar and inability for the below reviews to write a legible sentence I suspect the issues mentioned are related to the user, rather than the software.

I’ve edited gearing configurations for ultegra di2 and dura ace, including changing the shifter button functions. It works. Can’t ask for much more. Perhaps RTFM is applicable to the majority of users here!

Like many of the reviews read I ended up with a very expensive single gear bike when the firmware upgrade required upon first connection commenced. After about 10% of the upload, the app reported an error and the bike became totally unresponsive.
To reset the system I had to remove the battery (in my seat post) and after about a minute reconnect restoring function to the gears. I then went into my Bluetooth settings to forget the paired device before reconnecting using the passcode I had entered prior to the upgrade.
This time the app connected and the upgrade was installed successfully.

After all that initial disappointment, I did enjoy being able to customise my bike and refine the settings for each control.