INTRODUCTION
CMi4111 is an integrated communication interface that is mounted inside
a Gyr T230/T330 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.
ACTIVATION
Upon delivery, CMi4111 is set to passive mode, which means no messages
will be transmitted from the module. The module is activated via the
Elvaco OTC App which is avaliable in Google Play Store (compatible
with Android phones with Android 5.0 or later).
Start the Elvaco OTC app and place the phone on the front side of the
meter where the CMi4110 is mounted to scan via NFC. In the Elvaco
OTC App, set the Power mode to “Active” and click Apply settings. Place
the phone on the front side of the meter to apply settings.
If the module fails to join the LoRaWAN network at first attempt, it
will retry join attempts according to a schedule designed to conserve
battery. Delay between join attempts increase gradually from 15 seconds
to 24 hours.
CMi4111
Integrated MCM for Gyr
ULTRAHEAT® T230/T330, LoRaWAN
INITIAL DATA RATE CALIBRATION
When activated, CMi4111 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 activating the module, you should make sure to apply the correct
configuration profile by using the Elvaco mobile application Elvaco OTC.
Settings are transferred to the device using NFC. Please make sure NFC
is activated on your phone.
Join EUI -
The Join EUI sets the identification number of the application
server where data from the module will be delivered. The JoinEUI is by
default set to 94193A0307000001 (16 digits) in all CMi4111 devices.
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 CMi4111 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 mobile application for configuration.
Message format -
CMi4111 supports nine different message formats:
Standard, Compact, JSON, Scheduled-daily redundant, Scheduled
Extended, Combined heat/cooling, Simple Billing Plausibility check
and Monitoring. Please refer to the CMi4111 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 how
many messages per day the module transmits. It is possible to set any
transmit interval between 15 minutes and 1440 minutes (24 hours).
EcoMode -
EcoMode can be enabled to guarantee a battery-life of
11 years. The device-specific EcoMode table of the communication
interface 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. See EcoMode table
for CMi4111 below.
Data rate
Transmit interval
DR0
120 minutes
DR1
60 minutes
DR2-DR3
30minutes
DR4-DR5
15 minutes
Configuration lock -
CMi4111 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 (One Touch Commissioning) solution
which includes the mobile application for configuration.
After you have set all 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.
SERVER CONFIGURATION
Before CMi4111 is able to transmit messages on the LoRaWAN network,
device information needs to be added to the network server. More
specifically, the following parameters need to be registered (in OTAA
mode) in order to enable the network server to receive messages from
the module:
•
Device EUI (16-digit number)
•
Application key
•
Join EUI
NOTE
If activation mode is set to “ABP”. the application key does not need to
be added to the network server. Instead, the following information will
be needed: network session key, application session key and device
address.
