This article will take you through the steps to read and report the I2C sensor readings from the The SensorNode Bluetooth ®
Using the SensorNode as a Scanned Tag
As of the 2nd quarter of 2020 you can also add the SensorNode Bluetooth to Telematics Guru to act as a stand alone tag, without analogue data.
If you are using the SensorNode Bluetooth on a third party server you can retrieve the analogue data from the tag under field ID 29/30 as tag type 5. Able to be included in the payload are the following:
- Tag Serial number
- Tx Power
- Battery Voltage
- Internal Temperature
- DM Probe Temperature reading
- DM Temp/Humidity sensor reading
- Digital Input state
- Analogue input state
Please contact Digital matter for the data sheets for integration of this tag type.
Please read the article on Setting up a Gateway device to scan bluetooth tags here
Adding Tag Types
Wiring in Sensors
Wiring in Sensors
OEM Server Parameters
Setting up the parameters
Viewing Tag Data in OEM
As a initial troubleshooting measure, you can set data capture in OEM to see Tag data being recorded by the gateway device. This is a limited means of viewing tag data, as the total character length will truncate the amount of tags that are visible.
Default OEM Settings
The default analogue inputs in OEM for the sensor readings are as follows:
- Analogue 7 - DM Temperature Sensor 1 (these are the round metallic probes as in the image above)
- Analogue 8 - DM Temperature Sensor 2
Telematics Guru Parameters
Once you have set up the OEM Server parameters and wired in your sensors, you can start viewing the data collected in Telematics Guru. To Create an I/O Mapping for the sensor value Go to Manage Assets > Edit > I/O Mappings and click Add.
Once you pick the Analogue number as per your OEM Server parameters you can set up the measurement configuration. There are a selection of preset Types available, or you can use a general number and conversion
if your number appears in Telemetry IO as an incorrect value, e.g. 250.0%, try changing the Conversion factor, this will change the converted figure in Telemetry IO but not the raw data in Telemetry.
Save, here you can also select whether the readings will appear in Trip view and Live view.
Navigate to Assets > Telemetry I/O and you can see the final converted readings. You can also graph the analogue values for custom time periods by going to Reports > Fleet Reports > Asset Analogue Graph.