BMS Monitor Lite

MSRP: $75.00
Janus Technology
Version: 200
Please sign in to buy

This product cannot be added to the
cart because you are not logged in.

Now available on the Control4 iOS and Android apps!


Control4 BMS Monitor Lite is a unique driver from Janus technology for monitoring thermostat and consumption data, providing a simple web interface for viewing this historic data.

It is a perfect lightweight alternative to BMS Monitor if you only need to monitor a single zone (e.g. tracking rack temperature to confirm safe operation).

The driver allows key parameters from one thermostat in your project to be monitored (current temperature, setpoint, HVAC mode and HVAC state). Additionally, outside temperature is obtained from an Internet service, together with a temperature forecast for the rest of the day.

The solution supports any thermostat proxy, v1 or v2 - no special thermostat drivers are required. Furthermore, no additional devices/interfaces are required - all data is stored directly on the main controller, and backed up in persistent memory, so it is preserved across power cycles and even system restores. Up to 30 days' data (or 10K samples) are stored for the monitored elements, with simple navigation between daily and weekly views.

In addition to thermostats, BMS Monitor supports other data visualisations, such as water consumption, energy usage and more! See the FAQ for a full list of supported drivers.

While BMS Monitor Lite allows you to view one thermostat and one utility driver, you may be interested in BMS Monitor - which allows for any number of supported drivers to be monitored simultaneously!



Webview Compatibility

The webview interface is compatible with any Control4 UI. This includes T3/T4 touchscreens, and the iOS and Android apps*.

You can also view the interface from any browser by navigating to the following URL, substituting in the IP address of your main processor;



* iOS and Android apps require OS3.2+


Whats New?

v200 - 03/12/2021

  • Introduced compatibility with the Control4 iOS and Android apps!

v139 - 11/11/2021

  • Added Czech localisation.
  • Added support for the pool proxy.
  • Added support for power consumption & usage variables in updated Shelly EM driver (ChowMain).

v134 - 19/10/2021

  • Allow the week to start on different days (Monday/Saturday/Sunday).
  • Improved reliability of thermostat temperature readings for those using the Fahrenheit scale.

v127 - 11/03/2021

  • Added support for Shelly IoT EM, available here.
  • Allow choosing custom colours and states for timeline variables.
  • When viewing the yearly view of a bar graph, you can toggle between a window size of 1 day and 1 month.
  • Displays usage for the viewed time period for bar graphs.




What driver types are compatible with BMS Monitor?

  • Control4 Zigbee to IO / Contact Sensor (temperature and humidity)
  • Eaton xComfort energy sensor (energy, power, current, voltage)
  • eGauge Monitor (energy usage)
  • Flo by Moen (water consumption)
  • HeroLabs Sonic (water consumption)
  • KNX Generic Monitor (any KNX datatype) – available here
  • Pools (any driver using the C4 pool proxy)
  • Shelly IoT energy meter – available here
  • Thermostats (V1 and V2 proxy)
  • YATUN modbus generic monitor (any NUMBER_VARIABLE connection)
  • YATUN Variable Number driver


Which variables are monitored for thermostats?

Depending on the thermostat driver capabilities, the following variables can be monitored

  • Temperature
  • Setpoint C/F (single setpoint, or seperate Heat/Cool setpoints according to capabilities)
  • HVAC Mode
  • HVAC State
  • Humidity

Additionally, the following data will also be visible alongside the aforementioned variables

  • Outdoor temperature + forecast
  • Outdoor humidity + forecast


Can I use BMS Monitor from my phone/tablet?

You can! From OS3.2, you can now access Colour Wheel from the Control4 iOS and Android apps.


I would like a new driver type / variable to be monitored

We are actively working on this solution to bring other data visualisations into Control4. Please contact us with any suggestions or if you have any specific requirements!

Driver Download (, 3,550 Kb) [Download]