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As of 2025-07-24

TWELITE ARIA (BLUE / RED) Datasheet

Latest

TWELITE ARIA is a wireless tag that integrates the TWELITE wireless microcontroller, 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. It starts operating immediately when a coin cell (CR2032) is inserted. With low power consumption, it 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 is a compact wireless tag with excellent transmission range and long battery life.

Specifications

Model Numbers

The model numbers for TWELITE ARIA are as follows.

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

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 MCU section, please refer to the TWELITE datasheet.

TWELITE ARIA includes the following TWELITE modules:

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

Antenna

A reverse-F type 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

	MW-B-ARIA-0	MW-R-ARIA-0
Certification Type	TWE-001 Lite	TWELITE RED
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 and Humidity Sensor: Sensirion SHT40
Magnetic Sensor:
- Initial version: Texas Instruments DRV5032FD
- Units shipped from April 2024: Diodes Incorporated AH1390-HK4-7
Watchdog Timer: Texas Instruments TPL5010
LED: OSRAM Opto Semiconductors LB Q39E-L2OO-35-1

Sensors used may be changed without notice.

For details about each sensor, please refer to the respective datasheets.

Component Names

Appearance may vary depending on the lot. The figure above shows the initial lot.

1. TWELITE

This is the core wireless microcontroller module.

2. LED

Functions as a lamp to indicate status, etc.

3. 7P Interface

Interface used for configuring and writing the application.

This is the connector for TWELITE R2/R3. Be careful with the orientation. Connecting it in reverse while powered may cause damage.

Below is the correspondence table of signal pins.

Name	Signal Name	Description
GND	GND	Ground (negative power line)
TXD	DIO6	Serial line (connect to RX on PC side)
PRG	SPIMISO	Connect to GND to reset; when open or connected to VCC, enters programming mode
RXD	DIO7	Serial line (connect to TX on PC side)
RST	RESETN	Connect to GND to reset
VCC	VCC	Positive power supply
SET	-	Extended control signal

4. Temperature and Humidity Sensor

This is the temperature and humidity sensor.

5. I2C Expansion Port (Initial Lot Only)

Terminal for connecting I2C sensors. Only available on initial lots.

6. Magnetic Sensor

Sensor that detects proximity of a magnet. It is not a geomagnetic sensor.

7. Battery Holder

Coin cell holder for CR2032.

8. PCB Antenna

A PCB antenna formed by circuit patterns on the board.

Mechanical Drawings

Main Unit

PDF

Case

PDF

Circuit Diagram

PDF

Characteristics

This section describes characteristics specific to TWELITE ARIA and excerpts from component datasheets. For any unlisted items, please refer to the respective datasheets.

Values are based on semiconductor datasheets.

TWELITE

For details, refer to the TWELITE datasheet.

Absolute Maximum Ratings

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

Recommended Operating Conditions

	Condition	Min	Typ	Max	Unit
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	Unit
Sleep (RAM OFF, no timer)		0.1	µA
Sleep (RAM ON, with timer)		1.5	µA
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	Unit
DIO Internal Pull-up		40	50	60	kΩ
DIO High Input		VCC×0.7		VCC	V
DIO Low Input		-0.3		VCC×0.27	V
DIO Input Hysteresis		200	310	400	mV
DIO High Output		VCC×0.8		VCC	V
DIO Low Output		0		0.4	V
DIO Sink/Source 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 details, refer to the SHT40 product information.

The temperature and humidity sensor has been verified to be within ±1°C of the calibration value at room temperature before shipment. However, discrepancies may occur due to storage/usage conditions or aging. If more accurate readings are required, please perform calibration in your intended environment and apply corrections.

The temperature and humidity range shown in the table below indicates the sensor’s capability. TWELITE ARIA itself is designed to operate from -30 to 85°C and up to 85% relative humidity.

	Condition	Min	Typ	Max	Unit
Current Consumption	Idle, 25°C		0.1	1.0	µA
	During 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

Initial Version

For details, refer to the DRV5032FD product page.

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

Units Shipped from April 2024

For details, refer to the AH1390-HK4-7 product page.

	Condition	Min	Typ	Max	Unit
Current Consumption	VCC=3.6V		2.2	13	µA
Sampling Period		30	45	80	ms
Magnetic Threshold	S-pole approaching	6	17	25	Gauss
	N-pole approaching	-25	-17	-6	Gauss
	S-pole releasing	2	11	20	Gauss
	N-pole releasing	-20	-11	-2	Gauss

Watchdog Timer

For details, refer to the TPL5010 product page.

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

LED

For details, refer to the LB Q39E-L2OO-35-1 product page.

	Condition	Typ	Unit
Emission Wavelength	If=5mA	470	nm
Luminous Intensity	If=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 functioning properly.

Ensure correct battery orientation. Inserting it backwards may cause overheating and damage.

Due to its structure, the battery holder of TWELITE ARIA is prone to detachment at the soldered area. Please follow the precautions below:

When removing the coin cell, it is recommended to gently press the battery holder from above to avoid stressing the soldered section.
When operating TWELITE ARIA, use a dedicated case to hold down the battery holder from above.

Waterproof Performance

The TWELITE ARIA case is not waterproof.

Disposal

Dispose of this device in accordance with your local municipality’s ordinances and regulations. Please consult your local authorities for details.

General Notes

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

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

Revision History

Version	Date	Description
1.2.1	2024/5/7	Added Component Names
1.2.0	2024/2/27	Added information about the new magnetic sensor
1.1.1	2024/2/27	Migrated to new website, minor corrections
1.1.0	2020/12/10	Added antenna radiation pattern details
1.0.0	2020/12/3	Initial version