This article describes the features of the MT40 - Smart Power Controller page. To access this page, navigate to Sensors > Monitor > Sensors in the Meraki Dashboard.
The device information header section displays the sensor device name, model, MAC address and online or offline status. The navigation tabs to access Device details and Power controls pages are also contained in this section.
Data Time and Value Picker
Use the time range dropdown menu to filter the Device Readings Charts. These charts use aggregated data for optimal page performance, which might result in some data points displaying as an average of available data. To view the complete data, select between Average, Maximum, and Minimum values for that chart.
|Data Point Resolution
|>2 hours <24 hours
|24 hours - 1 week
|1 week - 30 days
The Assigned camera section is visible if a camera is associated with the sensor. It will display a live stream of the camera, a time-stamped list of triggered alerts, and a link to a snapshot of the camera feed at the time an alert was triggered.
Device Readings Charts
The Device Reading Charts display the following data from the MT40:
- Energy: Total energy consumption (kWh)
- Real Power: Real power consumption of downstream device (W)
- Apparent Power: Total power consumption of downstream device (VA)
- Voltage: Difference in electric potential between two points (V)
- Current: Amount of electricity flowing through (A)
- Power Factor: Percentage ratio of real power over apparent power (%)
- Frequency: Rate at which current changes direction per second (Hz)
The Device Details sidebar displays the sensor location, serial number, alert profiles, tags, notes, and firmware version. Click the pencil icon in Sensor alert profiles or Tags to add this sensor to existing Alert Profiles or Tag groups.
The Signal Strength table displays gateways in range of the sensor and their signal strength. The color and status of the RSSI is based on 3 values:
🟢 Green = Stronger than -65 dBm
🟡 Yellow = Between -65 and -85 dBm
🔴 Red = Weaker than -85 dBm
The Last reported column indicates the last time the gateway received an advertisement from this sensor. The Last connected column displays the most recent connection to a specific gateway.
All connections will be rejected when the RSSI is less than, or equal to, -85dBm.
The Power controls panel displays the remote lock-out switch status. It also includes options to enable or disable downstream power, or to power cycle the sensor.
The Power controls feature is only available when the gateway firmware meets the minimum requirements. See the MT40 Installation Guide for more information.
Remote Power Controls
The icon in Remote power controls indicates the current status of the physical remote lock-out switch:
- Enabled: Unlocked state (power commands can be executed remotely)
- Disabled: Locked state (remote power commands are not allowed)
When the lock-out switch is in a disabled state, the downstream power is always on.
The Downstream power toggle displays the current state of the downstream power. Click the toggle to enable or disable downstream power.
The downstream power state persists during upstream power outages. For example, if a downstream power state is off before a power outage, the MT40 will persist this state when the upstream power is restored.
The Start power cycle button sends a command to the MT40 to power off the device, wait 10 seconds, and then power back on. Downstream power must be enabled to issue remote power commands. While the power cycle is running, the Downstream power toggle will reflect the power state.
MT sensors cannot receive further commands if the downstream device is powering any MT gateways. Verify that the downstream device is not powering any MT gateways. If the gateway is no longer reachable, toggle the physical remote lock-out switch on the sensor to recover power.
Power Event Log
The Power event log is a record of all power commands sent to the sensor. The log displays the name and email address of the user who sent the command, the time the command was sent, and the event type of the command. The time displayed is shown in the network timezone.