CXCAN Command - CAN Bus Configuration

Configures the usage mode of the integrated CAN module. Data capture and subsequent analysis will depend on the type of protocol and data transmission speed.

What is it for?

Use case	Description
⛽ Fuel consumption	Read ECU data from vehicle
🚗 Engine data	RPM, temperature, pressure
📊 Advanced telemetry	OBD2/J1939 information
🚚 Transport fleets	Monitoring trucks and buses

Commands

Configure


SCXCANa,bbb,cccc,ddd,eee,f

Query


QCXCAN

Response


RCXCANa,bbb,cccc,ddd,eee,f

Parameters

Field	Description	Values
a	Enable	0=Disabled, 1=Enabled
bbb	Transmission speed	125K, 250K, 500K, etc.
cccc	Protocol	J1939, OBD2, etc.
ddd	Time delay	-
eee	FuelTripSoftEnable	0=Disable calculation, 1-100=Enable with percentage factor
f	FuelTripSoftEngineType	Engine type for Software FuelTrip calculation

Examples

Configure CAN with J1939 at 250K


>SCXCAN1,250K,J1939<
// 1     → Enabled
// 250K  → Speed 250 Kbaud
// J1939 → Protocol for heavy vehicles

Once the protocol/speed is configured, it is not necessary to reconfigure it each time you want to enable or disable reading.

Enable reading


>SCXCAN1<

Disable reading


>SCXCAN0<

1 Mbps speed

The speed field (bbb) accepts the value 1M to run the CAN bus at 1 Mbps, in addition to the Kbaud values (125K, 250K, 500K, …). The suffix indicates the unit: K = Kbaud, M = Mbaud.


>SCXCAN1,1M,J1939<
// 1     → Enabled
// 1M    → Speed 1 Mbps (1000 Kbaud)
// J1939 → Protocol for heavy vehicles

The 1M value is supported at the hardware level from firmware v1.09.21. Use the speed that matches the vehicle’s bus; 1 Mbps is common on high-speed CAN buses.

Compatibility

💾Firmware:v1.00.00

💾Firmware v1.00.00

SP-IOT

SM-IOT

ZE-IOT

Parameters eee and f from v1.02.06