Domestic IoT Solutions

Features & Functions

Wide coverage area

LTE, CDMA 1X WIN, CDMA 1X are available in a wide coverage with a stabilize signal.

Communication system Speed
Uplink Downlink
LTE 25Mbps 75Mbps
CDMA 1X WIN 144kbps 2.4Mbps
CDMA 1X 64kbps 144kbps
  • In some areas, the maximum receiving speed is 37.5Mbps and the maximum sending speed is 12.5Mbps.
  • Since this service is provided as a best-effort service, communication speed is subject to the influences of the communication environment and traffic conditions. Even within the service area, data communication may not be available in locations with weak signals.
  • Service area and speed vary depending on the model of your communication module and your rate plan,

KDDI Module Remote Management Service (KDDI MRMS)

Logo: KDDI MRMS Module Remote Management Service

This service allows users to monitor and operate communication module devices remotely via the Internet.
You can check the installation site (GPS information) of a product equipped with a communication module device as well as the signal condition in the surrounding area, and confirm and change the setting of communication module devices.

Figure: KDDI Module Remote Management Service (KDDI MRMS)


Item Details
Remote monitoring function Allows users to check the received signal condition of communication module devices via a network.
Remote operation function Allows users to check and change the detailed setting of communication modules via a network.


Item Charge
Monthly basic charge ¥10,000/ID
SMS distribution charge
(number of distributed SMS mails)
1-1,000 ¥1,000
1,001-10,000 ¥5,000
10,001-30,000 ¥10,000
30,001-50,000 ¥20,000
50,001 and over ¥20,000 is added every 50,000 mails

Supported communication modules

KYM11, WM-M300, WM-M320

Emergency Mail function

Emergency Mail is a service that simultaneously inform you

  • Earthquake early warnings
  • Tsunami warnings
  • disaster information
  • evacuation recommendation

  • This service is only available within Japan (not available overseas).
  • This function does not guarantee advance notification.

Supported modules

KYM11, WM-M300*, WM-M320*, WM-M200A*, WM-M210A*

  • Only the earthquake early warning function is supported.
  • You may receive information regarding an area other than your present location.
  • KDDI assumes no responsibility for damages resulting from non-delivery or delay of information due to communication or system failure, or the content of the information, or any other reasons that are not attributable to the responsibility of KDDI.


Usage fee/Information charge Free


Open link in a new windowJapan Meteorological Agency

GPS function

Due to the adoption of the gpsOne system, which uses the GPS satellite positioning information in combination with the au base station location information, approximate location can be positioned even in places like underground or indoor locations where satellite signals cannot reach, as long as the device is in the au service area. In addition, shorter time is needed for positioning compared to the conventional system of positioning only using the GPS signal.

  • Location positioning is possible without a GPS unit.

Image: GPS function

Protocol conversion function

Data transmitted from a device with embedded communication module is automatically converted to TCP/UDP protocol to be sent out as packets. This saves customer products from having a TCP/UDP stack, enabling product development with reduced cost.

Supported modules

KYM11, WM-M300, WM-M320, WM-M200A, WM-M210A, KCMV-200

Image: Protocol conversion

OTA (Over The Air) function

Lines can be opened or stopped by writing or deleting the ID information of a phone number via wireless operation.
This function can prevent communication charges from being incurred during the manufacturing process of a product or while a product is in stock.

Image: OTA (Over The Air)
Image: OTA (Over The Air)

OTA service charge

Date & Time / Easy location information acquisition function

The accurate time information and the approximate location information based on base station can be acquired with AT commands. This enables the omission of a time server and allows users to know the location the device is used at.

  • All of the indicated amounts exclude tax unless otherwise specified.