Installation

Mounting the product

CMi4140 can be used in either a Kamstrup MULTICAL® 403, MULTICAL® 603, or a MULTICAL® 803 heat/cooling meter. If the module is not mounted in the meter upon delivery, it is easily inserted and installed:

  1. Grab the device by the outer edges.

  2. Gently press it into position in the module slot.

  3. Connect the power connector to the meter power supply.

Connection of the LoRaWAN® antenna

CMi4140 has an option for using either an internal or an external LoRaWAN® antenna. Since both antennas are using the MCX connector, they are interchangeable.

  1. Connect the internal or external or antenna with MCX connector to the module in the meter.

  2. Route the antenna cable (if using an external antenna)

  3. Push the connector gently into the socket on the module.

Caution

If using an external antenna, make sure to mount it at least 0.5 meters away from the meter in order not to cause interference.

Activating the module

Note

Before activating the module, and trying to join a LoRaWAN® network, make sure the LoRaWAN® network server of use is prepared with necessary device and security related information. Security keys for Elvaco devices can be accessed in Elvaco EVO, Elvaco EVO Login.

Upon delivery, the module is set to inactive mode, which means no messages will be transmitted from the module before being activated. The module can be activated either via the buttons on the meter, or via the Elvaco OTC App:

Module activation via meter buttons

  • On MULTICAL® 403, press and hold both buttons on the front of the meter until “CALL” is displayed.

  • On MULTICAL® 603 and MULTICAL® 803, press down the two arrow buttons on the front of the meter until “CALL” is displayed.

Module activation via Elvaco OTC App

  1. Open Elvaco OTC app (available for Android and iOS).

  2. Scan the module (make sure NFC is activated on the phone).

  3. Go to Apply mode.

  4. Set the power mode to Active.

  5. Select Apply settings.

  6. Scan the module to apply new settings.

    To verify that the module has been activated, go to Inspect, scan the module, and make sure that power mode is set to Active.

Tip

  • If the module is mounted inside a MULTICAL® 403, the NFC field is easiest accessible if placing your phone in the middle of the higher part of the back.

  • MULTICAL® 603 has two module slots. If mounted in the left module slot, the NFC field is easiest accessible if placing your phone in the middle of the higher part of the back. If the module is mounted in the right module slot, place your phone to the right of the higher part of the back.

  • If the module is mounted in MULTICAL® 803, the meter needs to be open to access the NFC field. Place your phone close to the CMi4140 when making the NFC scan.

LoRaWAN® network end-device activation

Before being able to transmit data over a LoRaWAN® network, the module must be personalized and activated. This can be done in two different ways for LoRaWAN®, Over-the-air activation (OTAA) or Activation by Personalization (ABP). For security reasons, 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.

In OTAA mode

Before the module is able to transmit messages via 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 receive messages from the module:

Device EUI

16 digit module unique identification number. It is not configurable.

Application key

The application key of each 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.

JoinEUI

Sets the identification number of the join server. The identification number is set to a default value in all devices. The default value is presented in Elvaco OTC configuration options.
In ABP mode

If the 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

Used by both the module and the network server.

Application session key

Used for payload encryption and decryption.

Device address

Unique identifier of the module.

Reading the module status via meter display

In addition to the Elvaco OTC App, the current status of the module can be read via the meter display. To retrieve the status of the module via the meter display, enter the tech loop of the meter display and request the status information of the module. For detailed information, see the Kamstrup MULTICAL® Technical description.

The following table provides a description of how the current status of module is read off the meter’s display.

As an example, if the display shows “5311111”, that means that the module has been activated and has successfully joined the LoRaWAN® network.

Table 215. Module status indication on meter display

Character, MSB -> lsb

Status

1-2

53 = Module identification number (CMi4140)

3

1 = All following characters are set to “1”

0 = One or more of the following characters are set to “0”

4

1 = Meter has granted active mode for the module

0 = Meter has requested the module to be idle

5

1 = Module has joined the LoRaWAN® network

0 = module has not joined the LoRaWAN® network

6

1 = Module SuperCap has been charged

0 = Module SuperCap is charging

7

1 = Module is active

0 = Module is inactive

Was this article helpful?

0 out of 0 found this helpful
Have more questions? Submit a request

Related articles

Comments (0 comments)

Article is closed for comments.