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As of 2025-07-24

TWELITE ARIA (BLUE / RED) Datasheet

v1.0.1

TWELITE ARIA is a wireless tag that integrates the wireless microcontroller TWELITE, a temperature/humidity sensor, magnetic sensor, coin cell battery holder, and antenna into a single package. It can wirelessly transmit temperature, humidity, and door open/close status.

A dedicated ARIA application (firmware) is pre-installed, so it starts operating as soon as a coin cell (CR2032) is inserted. It features low power consumption and can operate continuously for years.

It is ideal for those who have ideas for using wireless tags but are not confident in hardware or software development, or who have limited development resources.

TWELITE ARIA offers excellent wireless range, long battery life, and a compact form factor.

Specifications

製品型番

The model numbers for TWELITE ARIA are as follows.

Common Name	Product Code	Remarks
TWELITE ARIA (BLUE)	MW-B-ARIA-0	Standard Power
TWELITE ARIA (RED)	MW-R-ARIA-0	High Power

Product codes are subject to change. For the latest product codes, please refer to our official website.

Wireless and MCU Section

For specifications of the wireless and microcontroller sections, please refer to the TWELITE datasheet.

TWELITE ARIA includes the following TWELITE modules:

Model	Included TWELITE
MW-B-ARIA-0	TWE-L-WX
MW-R-ARIA-0	MW-R-WX

Antenna

The inverted-F antenna is adopted.

Item	Specification
Antenna Type	MW-A-P1934 (Datasheet)
Gain (Typical, Omni)	`1.8[dBi]` (without case) / `-0.46[dBi]` (with case)
Polarization	Linear Polarization

Vertical Radiation Pattern

Horizontal Radiation Pattern

Certifications

Item	MW-B-ARIA-0	MW-R-ARIA-0
Certification Type	TWE-001 Lite	TWELITE RED
Japan MIC Certification No.	007-AB0031	007-AF0062
FCC ID	2AINN-L1	-
IC ID	21544-L1	-
Remarks	RoHS Compliant	RoHS Compliant

Only MW-B-ARIA-0 is certified for overseas use.

Depending on the country of use, it may be required to label the TWELITE module or product with FCC ID or IC ID. If you suspect this applies to your use case, please contact us.

Built-in Sensors

Temperature/Humidity Sensor: Sensirion SHT40
Magnetic Sensor: Texas Instruments DRV5032FD
Watchdog Timer: Texas Instruments TPL5010
LED: OSRAM Opto Semiconductors LB Q39E-L2OO-35-1

The sensors used are subject to change without notice.

For details on each sensor, please refer to their respective datasheets.

Mechanical Drawings

Main Unit

PDF

Case

PDF

Circuit Diagram

PDF

Characteristics

This section lists characteristics specific to TWELITE ARIA, as well as references from each component’s datasheet. For items not listed here, please consult the respective datasheets.

Values are based on the semiconductor datasheets.

TWELITE

For details, refer to the TWELITE datasheet.

Absolute Maximum Ratings

	Min	Max
Power Supply (VCC)	-0.3	3.6	V
Analog I/O (VREF/ADC)	-0.3	VCC+0.3	V
Digital I/O	-0.3	VCC+0.3	V

Recommended Operating Conditions

	Condition	Min	Typ	Max
Supply Voltage		2.0	3.0	3.6	V
Start-up Voltage		2.05			V
Operating Temperature	No condensation	-20		75	°C
Operating Humidity	No condensation			85	%RH

Current Consumption

	Condition	Typ
Sleep (Without Timer)		0.1	uA
Sleep (With Timer)		1.5	uA
Tx (CPU doze)	MW-B-ARIA-0	15.3	mA
	MW-R-ARIA-0	23.3	mA
Rx (CPU doze)	MW-B-ARIA-0	17.0	mA
	MW-R-ARIA-0	14.0	mA

I/O Characteristics

	Condition	Min	Typ	Max
DIO Internal Pull-up		40	50	60	kΩ
DIO Hi Input		VCCx0.7		VCC	V
DIO Lo Input		-0.3		VCCx0.27	V
DIO Input Hysteresis		200	310	400	mV
DIO Hi Output		VCCx0.8		VCC	V
DIO Lo Input		0		0.4	V
Load/Sink Current	VCC 2.7~3.6V		4		mA
	VCC 2.2~2.7V		3		mA
	VCC 2.0~2.2V		2.5		mA

Temperature and Humidity Sensor

For more information, see the SHT40 product page.

The temperature and humidity sensor is verified to be within ±1°C of the calibration value performed at room temperature prior to shipment. However, storage conditions, usage environment, and aging may cause deviation from actual values. If accurate readings are required, please perform calibration in your intended environment and apply correction to the measurements.

The temperature and humidity ranges shown in the table below are the sensor’s own limits. Note that TWELITE ARIA is rated for an operating temperature range of -30 to 85°C and humidity up to 85%.

	Condition	Min	Typ	Max	Unit
Current Consumption	Idle state, 25°C		0.1	1.0	µA
	Measurement		350	500	µA
Measurement Range	Temperature	-40		125	°C
	Humidity	0		100	%RH
Resolution	Temperature		0.01		°C
	Humidity		0.01		%RH

Magnetic Sensor

For more information, see the DRV5032FD product page.

	Condition	Min	Typ	Max	Unit
Current Consumption	VCC = 3V		1.6	3.5	µA
Sampling Frequency			20		Hz
Magnetic Threshold	Approaching	±1.5	±3.0	±4.8	mT
	Receding	±0.5	±1.5	±3.0	mT

Watchdog Timer

For more information, see the TPL5010 product page.

	Condition	Min	Typ	Max	Unit
Current Consumption			35	50	nA
Pulse Interval		60	90	120	sec

LED

For more information, see the LB Q39E-L2OO-35-1 product page.

	Condition	Typ	Unit
Emission Wavelength	If = 5mA	470	nm
Luminous Intensity	Vf = 5mA	45	mcd
Limiting Resistor		220	Ω

Precautions

Inserting the Coin Cell

Insert the CR2032 coin cell with the positive side facing the positive side of the holder. If the LED on the TWELITE ARIA blinks three times, it is operating correctly.

Be sure to insert the battery in the correct orientation. Inserting it in reverse may cause overheating and damage.

Also, due to the structure of the TWELITE ARIA’s battery holder, the soldered joints may come loose. Please observe the following precautions:

When removing the coin cell, it is recommended to gently press down on the battery holder from above with your finger to avoid stressing the solder joints.
When using TWELITE ARIA, it is recommended to operate it while pressing the battery holder down with a dedicated case.

Disposal

When disposing of this device, please follow the ordinances and regulations of your local municipality. For details, consult your local government.

General Notes

When using our products, be sure to evaluate and verify them under the actual conditions of your usage environment.

For applications requiring high reliability or involving human safety, please consult your distributor in advance.

Revision History

Version	Date	Details
1.1.1	2024/2/27	Migrated to new website, minor corrections
1.1.0	2020/12/10	Added information on antenna radiation pattern
1.0.0	2020/12/3	Initial release