482 Firmware Update PDF Print


  1. tekmar Gateway 482e
  2. Computer with a serial port (or a USB to serial converter)
  3. Download the firmware & flash magic settings files 482_UpdateC.zip
  4. Unzip the file to a location that you can easily find. The zip contents include 482_flash_magic.fms & 101702_J1196B.hex files.
  5. Download Flash Magic programming software.  Flashmagic.exe This software is windows only, if you are using a Mac you will need to use a virtual machine running windows (e.g. Parallels) in order to run this software.


  1. Install Flash Magic software.
  2. Connect the 482e to the computer with the Flash Magic software installed on it.
  3. Power down the 482e.
  4. Power up the 482e while pressing the test button. Release the test button once the Power and Tx LED are on.
  5. Open the Flash Magic Software and load the 482_flash_magic.fms settings file. (File -> Open Settings -> Locate the settings file on the computer.)
  6. In the area labeled "Step 1" of the Flash Magic software change the "COM Port" to the port that the 482 is connected to. (If a USB-to-Serial converter is used, Start -> Settings -> Control Panel -> System -> Hardware -> Device Manager. Under "Ports", determine the COM Port used by the USB-to-Serial device.)
  7. In the area labeled "Step 3" of the Flash Magic software click on the "Browse" button and locate the 482e firmware (101702_J1196C.hex) on the computer.
  8. Click "Start" in the bottom right hand corner of the Flash Magic software. During programming, the Tx and Rx LED will flicker rapidly.Wait for Flash Magic to say that the programming is "Finished", do not turn off the computer, the 482e or disconnect the 482e from the computer while the update is in progress.
  9. Power off the 482e and disconnect it from the computer.

View of Flash Magic

Software Release Notes


The software now supports slab setpoint only operation for floor temperature control. This requires the thermostat room sensor to be off, and auxiliary sensor to be set to floor.


The HVAC system has energy saving modes to prevent heating during Warm Weather Shut Down (WWSD) or while the Cooling Group Master thermostat is actively cooling. During these energy saving modes, the HeatSetpoint will report 40 degrees Fahrenheit or 4.5 degrees Celsius. Version 'B' corrects the HeatSetpoint behavior so that it continues to report the true heating temperature setpoint set by the user.