EmStream User Guide

EmStream is the PC application for receiving live telemetry data from Emtron displays. It subscribes to the telemetry stream published by an ED7 or ED10 display and presents real-time channel values, plots, and track position. EmStream also supports voice communications and text chat when licensed on the vehicle.

EmStream is available via EmUpdater.

Prerequisites

Before using EmStream, the vehicle display must be configured and activated for telemetry:

Activate telemetry on EmNet — see Telemetry Activation.
Configure telemetry credentials on the display in Display Studio — see Authentication.
Enable and configure the telemetry provider on the display — see Data Service.

EmStream uses the same vehicle name and password entered during activation.

Main Window

Area	Description
Centre	Active view — grid, plots, track map, or a combination
Right drawer	Live Data panel showing all channel values and events
Toolbar	Connection status, pause logging, chat console

The title bar shows connection status for all three services:

Indicator	Service
Telemetry	Data stream with username and data rate (kbit/s)
Voice	Voice comms connection and activity
Chat	Text chat connection

Button	Action
Pause / Resume	Pause or resume the local data logger
Chat icon	Open the floating chat console

File

Item	Description
Connect / Disconnect	Connect to the telemetry data server
Connect Voice / Disconnect Voice	Connect to the voice server
Connect Text Chat / Disconnect Text Chat	Connect to the text chat server
Connection Settings	Telemetry server and credentials — see Connection Settings
Voice Settings	Voice server, PTT, and audio — see Voice Comms
Text Chat Settings	Text server and display name — see Text Chat
Manage Saved Vehicles	Store vehicle name/password pairs for quick login
Language	Change the UI language
Exit	Close EmStream

Logger

Local data recording — see Data Logger:

Item	Description
Pause / Resume Logging	Stop or start buffering incoming data
Set Default Window (ms)	Default time window for plots (when paused)
Clear Logged Data	Erase the buffered data
Save Log to File	Export full buffer as `.dlf`
Save Visible Window to File	Export only the currently visible time window
Load Log from File	Load a previously saved `.dlf` file

View

Item	Description
Show Chat Console	Open the floating text chat window
Window Count	1, 2, 3, or 4 simultaneous windows
Type	View layout for the current window — see View Layouts
Set Track File	Load a `.geojson` track outline
Set GPX File	Load a `.gpx` route or waypoint file
Connect Waypoints	Draw lines between GPX waypoints

Help

Item	Description
Release Notes	Version history

Typical Workflow

Open EmStream and enter credentials in File → Connection Settings.
Connect to the telemetry server.
Optionally Connect Voice and Connect Text Chat.
Choose a view layout (Grid, Plots, or Track) from View → Type.
Configure channels in the view setup (pencil icon on Grid or Plots views).
Monitor values in the Live Data drawer on the right.
Pause logging and Save Log to File to archive a session.