CMa11L
Indoor sensor for temperature / humidity, LoRaWAN
IntroductIon
CMa11L is a sensor that measures temperature and humidity
in an indoor environments and deliver the data to a receiving
application (server) via a LoRaWAN network. For a complete
description of the product or for information in other
languages, visit the Elvaco AB website, http://www.elvaco.
com.
1.
NFC antenna
2.
Green LED
3.
Red LED
4.
Product label
5.
Push button
MountIng
CMa11L is mounted on a wall using the holes on its back
cover. Note that you should never mount the sensor near any
supplementary heat sources, in direct sun or LED light and at
least 1.5 meters above the floor.
ActIvAtIon
Upon delivery, CMa11L is set to passive mode, which means
no messages will be transmitted from the sensor. There are
two ways to activate the product:
1.
Press and hold down the push button (5) for at least 5
seconds and release it once the green LED lights up.
2.
By using the Elvaco OTC App. Set the
Power mode
to
“Active”, place your phone right next to the NFC antenna
(1) and click
Apply settings
.
Upon start-up the module will attempt to join the LoRaWAN
network. A successful join attempt is indicated by an 8-second
light up of the green LED (2).
If the sensor fails to join the LoRaWAN network 6 times, it
will wait for one hour before a new join attempt is performed
in order to conserve battery. A new join attempt cycle can be
initiated manually anytime by pressing the push button (2) for
at least 5 seconds and release it once the green LED lights
up, i.e. same procedure as normal activation.
SAFEtY
The warranty does not cover damage to the product caused
by usage in any other way than described in this manual.
Elvaco AB can not be liable for personal injury or property
damage caused by usage in any other way than described in
this manual.
English
dEvIcE conFIgurAtIon
Before activating the sensor, you should make sure to apply
the correct configuration profile by using the Elvaco OTC App.
Settings are transferred to the sensor using NFC.
Join EUI -
The Join EUI is the ID of your application server
where data from the sensor will be be delivered. The JoinEUI
is by default set to 0x00 00 00 00 00 00 00 00.
Activation type -
There are two different activation types
for CMa11L - Over-the-air activation (OTAA) and Activation by
personalization (ABP). Elvaco strongly recommends using
OTAA, where all session keys automatically generated each
time the sensor 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 device is
generated by Elvaco and used in OTAA mode to generate
session keys each time the sensor joins the LoRaWAN
network. Keys are managed in a secure way using Elvaco’s
OTC* Solution which includes the Elvaco OTC App for
configuration.
Message format -
CMa11L supports three different message
formats:
standard, compact
and
JSON
. Please refer to
the CMa11L user’s manual for more information about the
structure and payload of each message format.
Maximum daily transmissions -
The MaxDTx parameter can
be used to set a maximum limit for how often the sensor is
allowed to transmits messages on the LoRaWAN network.
Configuration lock
-
CMa11L has a configuration lock feature
which can be used to prevent unauthorized users to access
the sensor. When configuration lock has been enabled, a user
needs the device-specific Product Access Key
in order to
access the device.
After you have set all configuration parameters, place the
phone next to the NFC antenna of the sensor (1) and click
Apply settings
. Hold the phone still. New settings will be
transferred to the device using NFC.
InItIAl dAtA rAtE cAlIbrAtIon
When activated, CMa11L will initially transmit data every
minute in order to let the LoRaWAN network adjust to an
optimal data rate. After 10 minutes, the sensor will start using
its normal settings where the message transmit interval is
determined by the EcoMode settings or, if EcoMode has been
disabled, the Tx interval parameter.
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.
*OTC - One-touch commissioning
SErvEr conFIgurAtIon
Before CMa11L is able to transmit messages on the
LoRaWAN network, device information needs to be added
to the network server. More specifically, the following
parameters needs to be registered in order to enable the
network server to deliver and decrypt messages from the
sensor:
•
Device EUI (16-digit number printed on the device label)
•
Application key
•
Join EUI
