CXCQ Command - GPS Quality Filter
Configures GPS “quality filter” parameters applicable to “filtered” Extended Reports and Speed Thresholds.
What is it for?
| Use case | Description |
|---|---|
| 🎯 Position accuracy | Filter reports with low-quality GPS |
| 🛣️ Speed control | Avoid false alerts due to imprecise GPS |
| 📡 Obstacle zones | Adjust tolerance in problematic areas |
| 🏗️ Urban environments | Configure for areas with tall buildings |
Commands
Configure
SCXCQabcQuery
QCXCQResponse
RCXCQabcParameters
| Field | Description | Range | Default |
|---|---|---|---|
| a | Minimum fix | 2 or 3 | 3 |
| b | Maximum PDOP | 00-50 | 05 |
| c | Minimum satellite count | 03-24 | 03 |
The firmware only validates the ceiling of each field (Fix ≤ 3, PDOP ≤ 50, satellites ≤ 24): it does not enforce the floor shown in the table above. Sending a=0/a=1, or c below 03, is stored without error even though it makes no operational sense (the filter would end up effectively disabled).
Examples
Custom GPS quality filter
>SCXCQ31004<
// a=3 → Minimum fix: 3D (more precise)
// b=10 → Maximum PDOP: 10
// c=04 → Minimum 4 satellitesPDOP (Position Dilution of Precision): Lower values indicate better satellite geometry. Recommended: ≤5 for high precision.
Strict filter for speed control
>SCXCQ30306<
// 3D fix, PDOP ≤3, minimum 6 satellites
// Ideal for avoiding false speed violation alertsCompatibility
💾Firmware v1.08.00
SPLegacy
ULLegacy
MTLegacy
💾Firmware v1.00.00
SP-IOT
Last updated