Ldsrc2008/SocoTC-BMS-cheater

The socoTC system use rs485, master/slave protocol to communicate each other. This is made with a 5V 328P, to response to master as a BMS the detail of finding the protocol is here: https://ldsrc.blogspot.com/2023/12/soco-tc-rs485-decode.html

here is the test result: I use a usb to 485 to send query command to arduino, and the responce is now as soco TC battery pack.

Tested result: It does tell the system what I want it to be, I use a VR to change values and see if the system figure changes.

I found this git, who has more info than I have: https://github.com/stprograms/SuperSoco485Monitor/tree/main I will do a fork from this one, to do more things I need.

Decoded telegrams

The following telegrams and packages of read responses are already decoded.

BMS Status (Read Response 0xAA5A)

Byte (len=10)	0	1	2	3	4	5	6	7	8	9
	Voltage	SoC	Temp	Charge	CycleH	CycleL	?	?	VBreaker	Charging

Description of the variables

Variable	Description	Unit	Data Type
Voltage	current Voltage of the Battery in V	Volts[V]	unsigned byte
SoC	State of Charge in %	Percent [%]	unsigned byte
Temp	current temperatur of the BMS	Degree C [°C]	signed byte
Charge	current charging or discharging current in A	Ampere [A]	signed byte
Cycle[H/L]	Number of loading cycles		unsigned word
VBreaker		0 = OK 1 = bms stopped charge 2 = too high charge current 4 = too high discharge current	unsigned byte
Charging	Battery is currently charging	1 = charge 4 = discharge	unsigned byte

ECU Status (Read Response 0xAADA)

Byte (len=10)	0	1	2	3	4	5	6	7	8	9
	Mode	CurrentH	CurrentL	SpeedH	SpeedL	ECU Temp	?	?	Parking	?

Description of the variables

Variable	Description	Unit	Data Type
Mode	Speed Mode	1 - 3	unsigned byte
Current [H/L]	Current consumption	[mA] ?	unsigned word
Speed [H/L]	Current speed	[km/h] ?	unsigned word
ECU Temp	Temperature of ECU	Degree Celcius [°C]	signed byte
Parking	Parking mode	2 = on 1 = off	unsigned byte