Frequently Asked Question

How do I interprete J1939 output
Last Updated 2 years ago

The device supports 2 different parameter groups (Tx PGNs):
• Proprietary B Tx PGN1 65280 for Longitudinal, Lateral Inclination (Availability of lateral information depends on sensor type)
• Proprietary B Tx PGN2 65283 for X, Y, Z Acceleration

Inclination outputs PGN 65280 (FF00h).

Transmit PGN1 inclination 2-axis
Transmit PGN1 inclination 2-axis
Transmit PGN1 inclination 1-axis
Transmit PGN1 inclination 1-axis


The angle can be calculated with formula: α = J1939 output / 100. (α = angle in degrees, factory resolution is 0.01°)
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Example – Inclination output of a 1-axis sensor.
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The first 2 bytes are the angle value, the rest 6 bytes are not used.
Output 1-axis ±180° sensor explanation
Output 1-axis ±180° sensor explanation


Example – Inclination output of a 2-axis sensor
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The first 2 bytes are X inclination, and the second 2 bytes are Y inclination. The rest 4 bytes are not used.
Output 2-axis 90° sensor explanation
Output 2-axis 90° sensor explanation


Acceleration can be calculated with formula: a = J1939 output / 1000. (a = acceleration in g, factory resolution is 0.001g)

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For example:
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The 6 bytes data are defined as below.
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Please read manual for more details.

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