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Cisco Meraki

MT Frequently Asked Questions

Overview

This article is intended to provide a summary of the frequently asked questions on MT Sensors.

Connectivity

How do MT’s communicate with the Meraki Dashboard?

MT Sensors uses BLE to communicate with Meraki IoT gateways. Supported IoT gateway devices are 2nd Generation MV’s and Wi-Fi 6 MR’s. Full list of supported gateways below.
 

MV MR
MV12(N/W/WE), MV22(X), MV32, MV72(X) MR36, MR45, MR44, MR46, MR46E, MR55, MR56, MR76, MR86

 

Does MT Sensors support Wifi 5 (802.11ac Wave 2) APs as gateway?

No. At the moment, only Wifi 6 APs(listed above) are supported as gateways. Wifi 5 APs use a different BLE chipset than the WiFi 6 APs. All of our new Wifi 6 APs(and 2nd Gen MV Cameras) have the latest and greatest BLE chipsets that allowed us to have a more robust and secure connection to the MT Sensors.

How does the sensor connect to its gateway?

As long as the minimum requirements are met as per the Installation Guides and the sensor is within range of the gateway, it will automatically connect to any gateway that picks up the BLE advertisement of the sensor

What happens when MT’s can’t communicate with the Cisco Meraki Dashboard?

MT Sensors have onboard storage that will retain the last ~5 days of data. Upon reconnecting to the Cisco Meraki dashboard, all data points will be uploaded.

Sampling rate and frequency of connections

In order to conserve battery life, MT sensors are in sleep mode majority of the time. They wake up at a set regular interval to connect and report the data to the gateway which in turn uploads it to the Meraki Cloud. Below is the sampling rate and connections per device type:

MT10 Data Samping: 2 minutes
Connection Interval: 20 minutes
MT12 Data Sampling: Event Driven
Connection Interval: 20 minutes
MT20 Data Sampling: Event Driven
Connection Interval: 20 minutes

All sensors will wake up immediately if a configured threshold has been violated or if any event occurs in binary sensors like MT12 or MT20.

Deployment 

What Firmware on MV and MR is required for MT to work?

MV

MT sensors can only connect to a compatible MV gateway running MV 4.8+. Please refer to Managing Firmware Upgrade to schedule an upgrade.

MR

In order to use a compatible MR device as a gateway for MT sensors, the Network in question should be set to MR27.5.11. This is a patch release that is based off MR 27.5.1(latest stable) with additional support for MT sensors. Please refer to Managing Firmware Upgrade to schedule an upgrade.

Firmware Upgrade Manager - Meraki Dashboard 2020-11-05 12-52-19(1).png

MR 27.5.1 release DOES NOT SUPPORT MT sensors. The network HAS to be running 27.5.11 for MT sensors to be connected to the eligible MR gateways.

MR 27.5.11 version will only show up on Organization that has at least 1 MT sensor claimed in a network.

 

How far can the MTs be placed from the MR/MV gateway?

MT sensors use BLE 4.2 to communicate with the gateway. Since BLE operates between 2.402 and 2.480 GHz, the range depends on the same principles as 2.4 GHz Wifi. 

How many sensors can be used per gateway?

It is recommended to have a maximum of 8 sensors per gateway to ensure connection quality.

Are MTs rated for outdoor use?

No, MT devices are designed for indoor use only.  The MT12 is IPX5 rated (Can resist a sustained, low-pressure water jet spray) and has a rubber liner to separate the power/battery compartment from being splashed or exposed to water.  Still recommended NOT to submerge in water as the rating states.

What are the supported temperature and humidity ranges for the MT10?

The temperature sensor supports 0°C - 55°C / 32F - 131F (Accuracy: +/- 0.3°C) while using the included AA batteries. The humidity sensor ranges from 0-95%.  That said, it is NOT an outdoor (IP67) or harsh environment rated product. 

Can MT10 be used to monitor temperature and humidity inside of a freezer?

The sensors are not IP rated and we do not recommend installing them inside of freezers.

What part of the MT12 is capable of detecting water?

The full length of the cable can detect water as little as 3mL. The included cable is 8ft long, and can be extended to 16ft with an optional second cable attachment.

How are the MT sensors powered?  

All MT products will come with AA batteries(Alkaline) included, and these batteries will last for about 5 years of powering the unit. That said, if you want a “permanent” powering solution, there will be a USB Power adapter available at launch (MA-PWR-USB-XX) that can be used on the MT10 and MT12.  The MT20 ONLY supports battery operation. 

 5 years of battery life is projected based on the included 2.5V Alkaline batteries. Other types of batteries can be used but the battery life may vary.

Alerting and Monitoring

What kinds of alerting does MT sensors support?

MT sensors support Email and SMS alerts out of the box, no Twilio or similar integrations needed. They also support Webhook alerts out of the box.  It will also support Push updates from the Meraki App. Please refer to Sensor Alert Profile article in order to set up alerting.

Do MT sensors support API’s?

Yes. Sensor API endpoints are currently in Beta version. Please contact Meraki Support to enable the Sensor API endpoints for your organization if you wish to test it.

 

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