GC Command — Gradual Motor Cut

GC (Gradual Cut) system to progressively reduce engine power and stop vehicles in a controlled and safe manner.

What is it for?

This command allows controlling remote vehicle stopping without causing abrupt stops that could be dangerous:

🚗 Safe stopping — Gradually reduces power to prevent accidents
🔒 Vehicle recovery — Stops stolen or unauthorized vehicles
⚡ Remote control — Activate/deactivate from the platform
🛡️ Protection — The driver can park safely
📊 Monitoring — Check cut progress in real time

This system allows stopping vehicles remotely in a safe manner. It must be configured carefully according to the vehicle type.

Operation

Once activated (SGCA), the device sends pulses to the relay every interval seconds. Each pulse is longer than the previous one (according to step), generating increasing intermittent cuts in power supply.

This causes gradual power loss:

Start - No perceptible changes
Progressive - Gradual power loss
Final - Engine completely stopped

Syntax

Operation	Command	Description
Configure	`SGC[command][,xp,step,interval,max,invert]`	Configures and controls the system
Query	`QGC`	Queries current status
Response	`RGC[E/D],[xp],[step],[interval],[max],[invert];[status_info]`	Device response

Parameters

Parameter	Description	Values	Default
`command`	Action to execute	E/D/A/S/R	-
`xp`	Cut relay	0-2	0
`step`	Cut increment (ms)	1-9999	30
`interval`	Interval between pulses (s)	1-9999	4
`max`	Time until total cut (s)	1-9999	180
`invert`	Output logic inversion (v1.9.17+)	0-1	0

Logic Inversion: Useful for systems where the relay is normally energized and the cut is performed by de-energizing. With invert=1, the activation logic is inverted.

Available Commands

Command	Action
`E`	Enable - Enable system
`D`	Disable - Disable system
`A`	Activate - Activate gradual cut
`S`	Stop - Stop cut
`R`	Reset - Reset sequence

Status Information

Field	Description
`status`	disabled/ready/active
`elapsed_s`	Elapsed time (seconds)
`remain_s`	Remaining time (seconds)
`progress`	Progress percentage (0-100)
`pulse_ms`	Current pulse width (ms)

Usage Examples

Basic Operations


>SGCE<     // Enable system with default values
>SGCA<     // ACTIVATE gradual cut
>SGCS<     // STOP the cut (pause)
>SGCD<     // Disable system completely
>SGCR<     // Reset sequence from the beginning
>QGC<      // Query current status

Advanced Configurations


>SGCE,1,20,5,300<   // Truck: relay 1, step 20ms, interval 5s, max 5min
>SGCA,,50,2,60<     // Activate with new parameters: step 50ms, 2s, 1min
>SGCE,,,,240<       // Only change maximum time to 4 minutes
>SGCE,2<            // Enable using relay 2

The system stops when the device restarts. The R command resets the sequence without changing the configuration.

Cut Sequence (Default)

Configuration: step=30ms, interval=4s, max=180s

Time	Cut	Motor	Effect
0s	0.75%	99%	No perceptible changes
30s	5.6%	94%	Slight power loss
60s	11.3%	89%	Significant reduction
90s	16.9%	83%	Difficulty on slopes
120s	22.5%	78%	Very irregular engine
150s	28.1%	72%	Only unstable idle
180s	100%	0%	ENGINE STOPPED

Compatibility

💾Firmware:v1.00.00

SPLegacy

ULLegacy

SP-IOT

SM-IOT

ZE-IOT