INTRODUCTION
CMi4170 is an integrated meter connectivity module that is mounted
inside an Engelmann Sensostar S3/SC3 heating/cooling meter to deliver
meter data via a LoRaWAN network. For a complete description of the
product or for information in other languages, please visit the Elvaco AB
website, https://www.elvaco.com.
CMi4170
Integrated MCM for Engelmann Sensostar S3/S3C, LoRaWAN
If the module fails to join the LoRaWAN network, it will perform retries
until it succeeds. The time between each attempt will increase for every
attempt until it is performed once every day.
A new join attempt cycle can be manually started at any time by
rebooting the module (press and hold the push button (4) for 5-15
seconds, release the button when the green LED is lit) or by deactivating
and activating the module using the Elvaco OTC App.
INITIAL DATA RATE CALIBRATION
When activated, CMi4170 will initially transmit messages every minute in
order to let the LoRaWAN network adjust to an optimal data rate. After
three minutes, the module will start using its normal settings where the
message transmit interval is determined by the device configuration.
DEVICE CONFIGURATION
Before configuring the module, please make sure to apply the correct
configuration settings or profile by using the Elvaco OTC App. Settings
are transferred to the device using NFC.
Join EUI -
The Join EUI sets the identification number of the application
server where data from the module will be delivered. The Join EUI is by
default set to 94193A030C000001 in all CMi4170 modules.
Activation type -
There are two different activation types for LoRaWAN:
Over-the-air activation (OTAA) and Activation by personalization (ABP).
Elvaco strongly recommends using OTAA, where all network keys
are generated each time the module joins the LoRaWAN network. In
contrast, for ABP, all keys are set manually and stay constant over time.
Application key -
The application key of each CMi4170 device is
generated by Elvaco and used in OTAA mode to generate network keys
when the module joins the LoRaWAN network. Keys are managed in a
secure way using Elvaco’s OTC (One Touch Commissioning) solution
which includes the Elvaco OTC App for configuration.
Message format -
CMi4170 supports several different message formats.
Please refer to the CMi4170 user’s manual for more information about
the structure and payload of each message format.
Transmit interval -
The transmit interval parameter is used to set the
module transmits messages.
EcoMode -
EcoMode can be enabled to achieve a battery life of 10+1
or 6+1 years. The EcoMode table is then used to determine how often
the module is allowed to transmit data for each data rate. If the transmit
interval exceeds the limit in the EcoMode table, it will be lowered
accordingly.
Configuration lock -
CMi4170 has a configuration lock feature which
can be used to prevent unauthorized users to access the module. When
configuration lock has been enabled, a user needs the device-specific
Product Access Key in order to access the device. Keys are managed
in a secure way using Elvaco’s OTC solution which includes the mobile
application for configuration.
After you have set the configuration parameters, place the phone next
to the meter and click Apply settings. Hold the phone still until it vibrates
three times, this confirms that new settings have successfully been
transferred to the device via NFC.
MOUNTING
CMi4170 is mounted in the module slot of an Engelmann Sensostar S3/
S3C meter. Grab the device by the outer edges and gently press it into
position.
Please make sure that the module’s push button (4) is facing upwards
and that the interface connector of the meter fits the interface
connector of the module (3).
NOTE
Electrostatic-sensitive device. Please observe
the necessary ESD protective measures when
installing the module.
ACTIVATION
By default, CMi4170 is set to passive mode, which means no messages
will be transmitted from the module until it is activated. The module can
be activated in one of the following ways:
By using the Elvaco OTC App:
Open the Elvaco OTC app
(available in Google Play).
1. Scan the module, make sure NFC is activated on the phone.
2. In Elvaco OTC App, go to the “APPLY” tab,
3. Set “Power mode” to “Active”
4. Click “APPLY” in the bottom of the screen
5. Scan the module to apply new settings.
By using the module push button:
Press down the push button of the
module for at least five seconds until the green LED lights up.
By using the Engelmann optical interface configuration tool “Device
monitor”
or
By using using the meter menu
(for further information
please refer to Engelmann documentation).
When activated, CMi4170 will attempt to join the LoRaWAN network by
the following sequence:
1. Red LED – One flash
2. Green and Red LED – Lights simultaneously up for 1 second
3. Green LED – Several flashes while trying to connect to the LoRaWAN
network
4. Green LED – Lights up for 8 seconds when module succeeds in joining
the LoRaWAN network.
1.
Green LED
2.
Red LED
3.
Interface Connector
4.
Push Button
5.
Pulse Input
6.
LoRaWAN Antenna
Note: The NFC antenna
is located in the edge of
the PCB
