Hardware
J1939 Mini Streamer™
The DAWN Mini Streamer™ transfers OBD, CAN and J1939 data from a car or heavy duty vehicle to a mobile device (tablet, smart phone or PC) to view real-time data.
The mobile device can then upload the necessary information to a website for summary and analysis over cellular. The Mini Streamer is valuable for the service technician, vehicle inspector, or engineer who wants immediate feedback. It is also valuable to determine vehicle performance on a dynamometer. The technician can be in or outside of the vehicle.
The Mini Streamer is valuable for the service technician or vehicle inspector who wants immediate feedback. It is also valuable to measure vehicle performance on a dynamometer or in service repair shop. The technician can be in or outside of the vehicle.
For applications requiring data stroage, the DAWN Mini Logger can upload data in short intervals (i.e. 5 minutes) for near-real time data analysis. The logger sends data to a web-based dashboard that displays the latest data, summarizes the historical data, and automatically provides alerts when user-defined conditions are detected. Example DAWN Dashboards are at http://dashboard.hemdata.com/.
The Mini Streamer can simultaneously acquire and transfer three types of messages:
- Generic OBD-II – standard on all cars and light trucks after 1996 (mode $01) as defined by J1979
- Enhanced OBD – similar to a service scan tool database; specific to each OEM (mode $21 and $22)
- Normal messages – transmitted for normal vehicle operation; no request messages required (These can be any CAN format including J1939 and CANOpen)
The streamer can also transmit GPS data.
J1939 Mini Streamer Specifications
| Protocols | |
| ISO 15765-4 (CAN, 11-/29-bit, 250/500 kbps) | Yes |
| J1939 | Yes |
| J1708 | Yes |
|
No. of Protocol Ports (Channels) |
One CAN Channel (Autodetect: 250, 500kbps, other) |
|
Real-time PC data |
Yes |
|
RT Connections to PC |
WiFi |
|
LEDs for status |
RGB |
|
Operating system |
Proprietary RTOS |
|
GPS (NMEA 0183) |
Internal. |
|
Environment |
|
|
Size (inches) Size (mm) Weight (g) |
J1939 Connector: 1.5 x 1.5 x 1.0 28 |
|
Supply Current: |
80 mA. Up to 200mA with WiFi |
|
Operating Temperature C |
-40 to +110 |
|
Operating voltage |
4 to 30V |
|
Over/Under Voltage protection |
-30 to +100V |
|
Warranty |
1 Year |
Software
Also, HEM Data DawnPlot™ and DAWN MessageMonitor™ work with the Mini Streamer for real-time data and the Mini Logger for stored data.
- Use DawnPlot™ to plot engineering values in real-time on a PC or iPhone/iPad. Features include cursors, drag zooming, multiple y-axis overplots, and histograms.
- Use DAWN MessageMonitor™ to monitor, summarize, and display network traffic in real-time with a PC or iPhone/iPad. Message Monitor has many analysis features, such as sorting, filtering, and plotting specific bytes within messages.
Also, HEM Data creates custom applications. HEM Data will quote a custom app upon request or we can assist the user in developing one.
DawnEdit™ provides the OBD-II and J1939 databases relating parameters to messages. DAWN MessageMonitor™ will help you develop more advanced databases. Using the two software packages together provides an efficient way to reverse engineer messages and to then summarize your results in a standard DawnEdit database.
Reasons to use Message Monitor:
• Reverse engineering
• Understand broadcasted messages
• Determine message update rate
• Debug the Controllers on the Network
• Understand how to initiate Enhanced OBD Diagnostic Session
• Any application where messages are the focus
DawnPlot and MessageMonitor are both available for iPhone/iPad. Also, HEM Data creates custom applications.
Custom DawnPlot iPad App
