The offset would be set to -40 so that MyGeotab would know to subtract 40 from the value obtained from the GO device. If you are reporting a temperature range from -40 ☌ to 215 ☌, the third-party device would send values from 0 to 255 (can't send negative values). Geotab uses metric units and all predefined status IDs currently used by Geotab are in metric units. The unit refers to the unit of measurement that you wish to see in MyGeotab after all the conversions are complete. MyGeotab will then take the raw value received from the GO device and adjust by the multiplier and the offset, as per the formula:įinal Value = (Initial Value × Multiplier) + Offset The GO device will relay the raw data sent by the external device to MyGeotab. Conversions must be in the form as per the table below: Status Data IDĪ multiplier and offset must be supplied by the third-party vendor when requesting Status Data IDs so that MyGeotab can convert the data. For each piece of information, conversion parameters are also required. There is an extensively defined Status Data ID list which can be found at MyGeotab > Engine & Maintenance > Engine & Device... > Diagnostics. The Solutions Engineering team will respond with follow up questions to define the integration, and assign an External device ID, and any Status Data IDs that would be required.Īn additional resource is the Hardware Integration Toolkit with integration walkthrough.
Geotab recommends that RS232/USB serial ports are programmed in accordance with the following specifications: However, it is not required to power the Add On device using the IOX-RS232.Įven if the Hardware Add-On has a separate connection to vehicle power and ground, it is still recommended to connect the Add-On ground to the ground wire of the IOX-RS232 as this will improve signal integrity.
The IOX-USB can use two methods to enumerate a USB device: The maximum data transfer rate is 12 Mbit/s. The IOX-USB operates as a USB 2.0 full-speed host.
* Note - The GO device will automatically upgrade to the ProPlus rate plan once third-party data transfer begins.