Reverse engineering the Laotie Ti30 scooter LCD display - part 3 - Encryption Broken!

 

 

In the previous post I had the chance of discovering and documenting most of what there is to learn about the communication between the LCD unit and the master ESC (speed controller) that drives the e-Scooter rear motor.

Reverse engineering the Laotie Ti30 scooter LCD display - part 2

Most e-Scooters and other Electric Vehicles have some form of Electronic Speed Controller (ESC) which is responsible for delivering a power signal that will spin motors at the desired speed. The most common type of motors today are of the BLDC type (Brushless DC motors), which are typically driven by a 3-phase current.

Reverse engineering the Laotie Ti30 scooter LCD display

One thing about these types of electric vehicles is that there is very limited care for normalisation, when it comes to allow different components to interoperate. Especially in respect to the digital communication between the parts of the system, one cannot expect any baseline currently.

Exercising the right to repair - DYI fixing a Volkswagen Polo 6C windscreen wiper stalk (no parts replaced)

I just went on holidays and did a road trip. Because Murphy is always lurking, I was taken by surprise with runaway window wipers. No matter what position of the wiper stalk, these would run in intermittent mode all the time, as long as the ignition would be on.

Making a poor man DC/DC converter for E-Scooters by modifying a 230 Volt wall adapter

In these days where the exhausting of natural resources is an ever increasing concern, and the release of non-recyclable waste (which includes many electronic products) is a problem with no general solution in sight, being able to re-purpose devices that would otherwise be thrown to the garbage, can only be at all levels a welcomed idea. If we add to that the fact that in the current state of affairs, the semiconductor industry is experiencing a generalized production crisis, then re-purposing should have all the legitimacy it is entitled to have.

My experience with a grown man Electric Scooter - the Chinese 5600 Watt Laotie Ti30 - Part 3

The Laotie Ti30 (and other similar chinese scooters) comes with a basic alarm device that is capable of locking the scooter via a remote control. These alarm boxes are usually dirt cheap and can be bought separately for 5 € on Aliexpress or similar seller.

My experience with a grown man Electric Scooter - the Chinese 5600 Watt Laotie Ti30 - Part 2

Moving along with the range of improvements that this scooter requires - of which some are practically essential, the parts I needed for doing a few more improvements have conveniently arrived.