June 2020
Page 16 of 21
● Inputs and outputs for MicaSense sensors
Serial API
The Serial API provides a MAVLink interface to the Altum. You can use this API by connecting
your MAVLink-capable system to the host serial port on the sensor.
The API is accessed via serial messages in the MAVLink format. MAVLink provides an open
data format for interaction as well as a suite of tools to assist the programmer in developing
and testing the interface. Altum uses MAVLink v1.0 messages and communicates with the host
at 57600 baud.
For more information and examples, please see https://www.micasense.com/api
Disabled
“Disabled” should be set when triggering via Skyport (PSDK), HTTP API, or the serial (MAVLink)
API. This mode disables the camera’s automatic triggering functions, and will require trigger
commands directly from the drone via PSDK, HTTP, or MAVLink, depending on the integration.
Thermal Non-Uniform Calibration (NUC)
Performing Non-Uniform Calibrations on (NUCing) thermal images helps reduce image noise,
resulting in better thermal image quality. The auto-NUCing feature is enabled on boot, and
ensures that the calibration is up to date with NUCs occuring every five minutes or when the
temperature of the camera changes by 2 Kelvin. Altum firmware version 2.0.0 and newer has a
manual NUCing feature available through the HTTP API and through the serial API, which
allows the user or autopilot to request a NUC, instead of depending on the auto-NUCing
feature. Once a manual NUC is commanded, auto-NUCing will remain disabled until the
camera is turned off and then back on again. Manual NUCing can ensure that NUCs don’t
occur at inopportune times during data collection, but may lead to poor data quality if NUCs
aren’t performed as often as needed.
© 2020 MicaSense, Inc
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