RTR500BW Firmware Update Tool

Software for updating the RTR500BW firmware.


Software for updating the RTR500BW firmware.

Compatible Products RTR500BW
Version Ver. 1.00.29 (February 29, 2024)
File Name app-rtr500bw-firm-10029-all.exe
File Size8.17 MB
Operating Environment Compatible OS *1
Microsoft Windows 11 64bit English
Microsoft Windows 10 32/64bit English
Copyright T&D Corporation
Replication Copying to another media is expressly forbidden
*1: For installation, it is necessary to have Administrator (Computer Administrator) rights.

Important Note

Please also update your RTR500BW for Windows if it is not the latest version.

Firmware Update Procedure

  1. Please make the following preparations before update:
    ・Before connecting a USB cable, make sure that the PC has the USB device driver installed. (By installing the application "RTR500BW for Windows", the USB device driver will also be installed.)
    ・Exit all T&D applications (such as the Settings Utility) running on your computer.
    ・When a LAN cable is connected to RTR500BW, remove the LAN cable from the device.
    ・Using a USB cable, connect the RTR500BW to the PC in which "RTR500BW Firmware Update Tool" will be executed.
  2. Execute the downloaded "RTR500BW Firmware Update Tool".
  3. Please follow the instructions on the screen to update the Firmware.

Revision History

Ver. 1.00.29February 29, 2024

  • The device now automatically restarts if the wireless LAN connection fails continuously.
  • Fixed a problem that could cause the device to stop working when the communication failed because a Repeater lost power during wireless communication.
  • Changed the wireless LAN connection timeout from 6 seconds to 15 seconds.

Ver. 1.00.28November 30, 2023

  • The Wi-Fi driver on the built-in module has been updated to address an issue where the SSID of Wi-Fi 6 compatible wireless LAN access points could not be recognized and connected to.
  • Added a function to the update tool to display a message prompting the user to check the settings which may be causing unnecessary data communication.

Ver. 1.00.27August 24, 2023

  • Fixed a problem that caused communication timeout with T&D Data Server by sending current readings, log data and settings, etc. in succession.
  • Fixed a problem that occurred when measuring noise with the RTR505B and opening its recorded data (.xml file) in T&D Graph, where the data type was displayed as "voltage" in Channel Properties.
  • In the auto-transmission of recorded data after changing the settings of a Remote Unit, only the new data will now be sent instead of all data (including previously sent data).
  • Fixed a problem in which device information was not being registered in T&D Data Server when making a setting change (e.g., registering a Remote Unit) to the RTR500BW at the time of first usage.
  • Fixed a problem that occurred when sending Current Readings of RTR-576 to T&D WebStorage Service, where an abnormal value was displayed when the CO2 measurement had a negative value. (e.g. "-6 ppm" displayed as "4294967290 ppm")
  • When the setting data is corrupted due to power failure during writing the setting data, the data is now automatically restored from the backed-up data.

Ver. 1.00.26March 10, 2023

  • Reduced the frequency of transmission of Base Unit log data to reduce the processing load of the WebStorage server. (The minimum number of log data entries to be sent is now 10 instead of 1.)
  • The host name sent during DHCP connection is now displayed as "RTR500BW".
  • Fixed a problem where DHCP connection failed if there were three or more DNS server addresses included in the DHCP server response.
  • Fixed a problem where incorrect measurement data could be included in the automatic transmission recorded data.
  • HTTP(S) requests are now accepted even when the header names used in HTTP(S) communication are all in lowercase.
  • Removed the dummy Remote Unit information from test data sent to the server in Transmission Test - Test Transmission of Current Readings.

Ver. 1.00.25September 16, 2022

  • Fixed a problem where wireless communication error could continue to occur when internal communication between components failed.
  • Fixed a problem where the date/time information included in the Current Readings data could be incorrect.

Ver. 1.00.24June 21, 2022

  • Changed the default setting of the Recorded Data Transmission Schedule from Every Day 6:00 to Every Day at an hour determined by the time of first communication between the Base Unit and the mobile or Windows app.
  • Fixed an issue that occasionally caused a transmission error when the size of recorded data collected via a Repeater is large.
  • Fixed a problem that occurred when communication with the RTR-600 series (including the discontinued RTR-601 series) failed, where Error Code “0004-0004 Wireless Communication Failure (Repeater)” was output even if the repeater was not used.

Ver. 1.00.23April 15, 2022

  • Added a function to discard corrupted monitoring data when it is received.
  • Fixed a problem that occurred when sending settings while using Adjustment Tools for the RTR505B/RTR-505 with no module connected, where an error was not displayed correctly.
  • Fixed a problem that could cause corruption of output log data.
  • Fixed a problem that occurred when the link was down in a wireless LAN environment where there were multiple access points with the same SSID. Autonomous operation occasionally did not resume even after the link up.
  • Revised the threshold for generating a battery warning for lithium battery-powered Remote Units. (A warning will now be issued at battery level 3 instead of between 3 and 4).

Ver. 1.00.22January 07, 2022

  • Fixed a problem where recorded data with a timestamp in the future was uploaded to a server via automatic transmission, when the clock setting of the Remote Unit RTR-601 or RTR-602 was set to a value preceding GMT (e.g. UTC-8:00).

Ver. 1.00.21December 03, 2021

  • Improved the function to select the AP with the strongest signal if there are multiple APs with the same SSID when connecting to a wireless LAN.
  • When connecting to a wireless LAN, channels 12 and 13 are now available for 2.4Ghz band. (EU model only)
  • Fixed a problem that occurred when the LAN link was down during the HTTP transmission process, where autonomous operation occasionally did not resume even after the link up.
  • Fixed a problem where warning data was not resent to T&D Data Server when the first transmission failed.

Ver. 1.00.20November 15, 2021

  • Fixed the following problems that occurred when using Scale Conversion for the RTR505B (with Voltage, 4-20mA or Pulse modules).
    (1) The current readings/warning data value became abnormal when a negative value was input in the scale conversion formula.
    (2) A warning recovery mail could be sent incorrectly when the measurement exceeded the limit value.
  • Fixed a problem where connection to the wireless LAN access point failed when the Security Mode was set to No security in the Network Settings.

Ver. 1.00.19November 1, 2021

  • Fixed a problem that occurred when communicating with Repeater(s) and Remote Unit(s) via automatic route setting, where wireless communication could fail due to the misselection of the communication route.

Ver. 1.00.18July 28, 2021

  • When a DNS error occurs, the connection to the server is now possible using the previously obtained IP address of the server.
  • Added the Low Speed Operation feature to reduce communication errors caused by slow connection speed.
  • Fixed an error that occurred when using some mobile routers.
  • Fixed a problem where the WiFi connection could fail when there were multiple SSIDs that contain the name specified by the Base Unit but with different WiFi authentication methods.
  • Fixed a problem that occurred when changing the Remote Unit Settings via T&D Webstorage Service from the T&D 500B Utility mobile app, where an error message could be displayed even if the settings were successful.

Ver. 1.00.17June 17, 2021

  • Fixed a problem that occurred when changing warning settings for the RTR505B (Unit V/mA/dB), RTR-505 (Unit V/mA), or RTR-574/576 from the iOS app (T&D 500B Utility) via T&D WebStorage Service, where a warning recovery mail could be sent when a warning occurred.
  • The divided data size of the T2 command WSETF/RSETF has been increased to the same size as the older RTR-500 series.
  • Fixed a problem where a wireless communication error was reported as “0004-0099 (other error)”.
  • When communicating via HTTPS, no more retries are attempted if an invalid certificate error occurs.

Ver. 1.00.16May 20, 2021

  • Fixed a problem that caused a failure to download a large amount of recorded data via LAN.
  • Fixed a problem that occurred when changing any Remote Unit settings from the PC software (RTR500BW Settings Utility) after changing the recording interval of RTR505B to 1 or 2 minutes from the iOS app (T&D 500B Utility), where the current readings of that RTR505B (whose recording interval was changed) would not be transmitted.
  • Fixed a problem that occurred when enabling the daylight savings time in the iOS app (T&D 500B Utility), where the time stamp was not adjusted.
  • Fixed a problem where the transmission of recorded data and warning data could fail when setting the Remote Unit Name to the maximum length of 26 bytes.

Ver. 1.00.15April 19, 2021

  • Added support for "T&D Data Server".
  • Added a function to configure the MTU (Maximum Transmission Unit) size.
  • Fixed a problem where the secondary DNS did not correspond to the primary DNS when making network settings manually.
  • Fixed a problem where the times listed in the Current Readings and Recorded Data (XML files) were not displayed in daylight savings time correctly.
  • Fixed a problem that when RTR-574/576 sensor error occurred, the “CH1 sensor error” notification was sent for any channel error.
  • Fixed a problem that when RTR-574/576 wireless communication error occurred, some channels did not show “Communication Error” in the Current Readings (XML file).
  • Fixed a problem where the value of the warning ID (normally not in use) was set incorrectly in the warning data (XML file) for RTR-503/507/574/576.
  • Fixed an issue of displaying the “USB DISCONNECT” log even when the RTR500BW is connected to the PC via USB.

Ver. 1.00.14 March 22, 2021

  • Fixed a problem of warning data corruption when communication with a Remote Unit failed.
  • Fixed a problem where the result of wireless signal strength test was not displayed for some units when a large number of Remote Units were registered.
  • The MAC address can now be obtained even if the connection to the wireless LAN access point fails.

Ver. 1.00.13 February 18, 2021

  • Added support for the RTR-602.
  • Fixed a problem that occurred when sending the scale converted pulse data (with scale conversion function) to T&D WebStorage Service, where only [converted unit] was displayed with the measurement instead of [converted unit] / [rec interval].
  • Fixed a problem that occurred when sending current readings of RTR-574/576 to T&D WebStorage Service and wireless communication failed, where the updated time indication was not displayed correctly.
  • Fixed a problem where periodic communication with the server was not carried out and setting changes were not applied to the RTR500BW when no Remote Units were registered and autonomous operations such as current readings transmission and warning monitoring were set to OFF.
  • Fixed a problem where changes in autonomous operation settings were not applied to the RTR500BW correctly from the mobile app ”T&D 500B Utility” via T&D WebStorage Service.
  • Added USB and Bluetooth connection/disconnection log to the operation log file.
  • When a warning occurs and recovers within the warning monitoring interval, the alarm contact is now turned on for 10 seconds, the same as the previous model (RTR-500NW/AW).
  • Improved network connection stability.

User Agreement


  1. Although T&D Corporation has carried out operational tests on RTR500BW Firmware Update Tool, hereafter referred to as "the software", we cannot guarantee that all operations will work properly under all conditions.
  2. T&D Corporation shall not accept any responsibility for any damage whether direct or indirect that results from the usage of the software.
  3. Specifications of the software may be subject to change and service may be terminated without advance notice to the user. In such a case T&D Corporation shall not be responsible for any damages whether direct or indirect from the inability to use the software.
  4. T&D Corporation has no obligation to correct any defects found in the software.


  1. All copyrights for the software, including all of the programs and all related documents, are the sole property of T&D Corporation.
  2. The software is for use free of charge. Redistribution is permitted as long as it is to others for non-profit. In this case, all terms and conditions as written in the above disclaimers automatically transfer and hold true and valid for the party to which the program was redistributed. Please note that if you wish to commercially redistribute the program please contact your local distributor or T&D representative.
  3. The reprinting or redistribution for commercial purposes whether in part or in whole, in magazines or as a part of any product is strictly forbidden without the expressed consent of T&D Corporation. Any inquiries concerning commercial redistribution should be directed to the Sales Department of T&D Corporation.
  4. Please do not attempt to make any changes or modifications to the software.
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