Help Debugging Communication Protocol for LCD Display with Throttle

[its_akshay_04]

Hi everyone,


I’m currently trying to debug the communication protocol for a Chinese-made e-bike LCD display integrated with a throttle. This display seems to work only with its original controller, but I’m building a custom controller for my e-bike and want to interface this display with it — mainly to show speed and error codes.


I’ve tried analyzing the data frames using a logic analyzer at different baud rates and data bit settings, but so far, I haven’t been able to extract or interpret the correct data format.


Has anyone worked with this type of display before?

• Any details on the communication protocol or data format would be very helpful.
• If anyone has a datasheet or documentation for this LCD throttle, please share it.

Throttle Description (6-pin connector):

• White – Key
• Yellow – Key
• Blue – Speed data wire
• Black – Ground (GND)
• Green – Throttle signal
• Red – +5V supply

Any guidance or insights would be greatly appreciated!


Thanks,
Akshay

 

[Annieolnie]

Controllers and displays are set up with their own unique firmware. Every display will only work with its own controller. I try not to tell people, what they are trying to do is impossible, but what you are trying to do is impossible, especially with such a primitive sort of display. If you want to have parameters that you can change to your own liking, you need to look for a KT controller and KT display, which ever type will match your voltage and ebike set up. The one you show does not look very high voltage, so I don't think it would be very costly. You cannot program a pig to be a cow, no matter how good a programmer you are.