Updating RFL100 firmware - RFL100

Update advisory for RFL100 Wireless Data Logger with firmware version 1.0.0, 1.1.0, or 1.2.0 Technical Note

Document code
Document type
Technical note


  • Computer with a free USB port and an operating system that supports the Media Transfer Protocol (MTP). For example, Windows® 7 and newer.

  • USB connection cable (USB 2.0 type A - micro-B, Vaisala cable 244961). You can also use a generic cable that has all pins connected (not just power).

  • RFL100 firmware update file (.fw) and release notes document from Vaisala. The latest firmware version at the time of publishing this document is 1.5.0, you can download it from this link.

CAUTION Updating RFL100 firmware erases the recorded data on the device. Before updating, verify from the viewLinc Enterprise Server that up-to-date data from this device is available. You can also copy the data from the device for local storage; see Downloading data using service port.

Updating the firmware will not affect the data logger's status in the Vaisala viewLinc Monitoring System. If the device was accepted in the system before the update, it will remain accepted.

  1. If the firmware update file and release notes document are in a zip package, unzip it into a temporary directory.
  2. Before starting the firmware update, read the release notes for a summary of important changes and possible compatibility requirements.
  3. If the RFL100 is switched off, switch it on.
  4. Open the plug that covers the service port and connect the USB cable between your computer and the service port of the RFL100.
    After the computer detects the RFL100 and installs the appropriate driver, it is available for file transfer.
  5. Copy the firmware update file (file name ending in .fw) into the \Data\Update folder on the RFL100. For example, if your computer has a Windows operating system, you can simply drag the file into the correct folder (drag and drop) or use the copy and paste functions. Select to overwrite the old file when prompted.

    If the file is valid, RFL100 begins the update automatically. Do not unplug the cable or turn off the RFL100 during the update.

  6. Monitor the update progress on the display of the RFL100. When the update is done, you will see UPD OK message on the display, after which the RFL100 restarts with the new firmware.
  7. Disconnect the USB cable and close the plug over the service port.