DV Command - Acceleration/Deceleration Detection

Configures trigger thresholds to detect sudden braking or accelerations calculated from the GPS module.

What is it for?

🚨 Road safety — Detect emergency braking or dangerous accelerations
📊 Driving analysis — Evaluate driver’s driving style
🛡️ Accident prevention — Alert about risky behaviors
💰 Fuel savings — Identify aggressive driving that increases consumption
📋 Incident reports — Record sudden driving events

Command Summary

Action	Command	Description
Configure	`SDVaabccc`	Define type and magnitude of detection
Query	`QDVaa`	Get current configuration
Response	`RDVaabccc`	Response format

Parameters

Field	Description	Values
aa	Trigger index	`00`-`03` (4 triggers available)
b	Event type	`+` acceleration, `-` braking
ccc	Magnitude (km/h variation per second)	`000`-`999`

The magnitude represents the speed variation in km/h during one second. For example, 050 means a variation of 50 km/h in 1 second.

Associated Signals

Signal	Description
`DV00`	Acceleration/braking trigger index 0
`DV01`	Acceleration/braking trigger index 1
`DV02`	Acceleration/braking trigger index 2
`DV03`	Acceleration/braking trigger index 3

Examples

Detect sudden braking (50 km/h variation)


>SDV01-050<
// Trigger 01 activates with deceleration >= 50 km/h per second

Detect strong acceleration


>SDV02+040<
// Trigger 02 activates with acceleration >= 40 km/h per second

Query configuration


>QDV01<
// Response: RDV01-050

Usage in Event Rules

Sudden braking report


>SRL99E;TRG=DV01+;ACC={GCQ10H}<
// Generates CQ10 report when sudden braking is detected

Very low values can generate false positives due to normal GPS variations. It is recommended to use values >= 30 for braking and >= 25 for accelerations.

Compatibility

💾Firmware:v1.00.00

SPLegacy

ULLegacy

MTLegacy

C3Legacy

C5Legacy

SP-IOT

SM-IOT

ZE-IOT