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As of 2025-07-24

TWELITE UART (BLUE / RED) Datasheet

Latest Edition

TWELITE UART is ideal for connecting to external microcontrollers via UART. It implements a 7P interface that includes TX, RX, VCC, and GND.

The Serial Communication App (App_Uart) is pre-installed, allowing immediate wireless communication with microcontrollers, etc., simply by wiring.

Users can also edit and rewrite the application (firmware) themselves.

Specifications

Product Model

The model numbers of TWELITE UART are as follows.

Common Name	Sales Code	Remarks
TWELITE UART (BLUE)	MW-B-UART-P	Standard Output, Built-in Antenna
	MW-B-UART-U	Standard Output, Coaxial Connector
TWELITE UART (RED)	MW-R-UART-P	High Output, Built-in Antenna
	MW-R-UART-U	High Output, Coaxial Connector

Sales codes are subject to change. Please refer to our website for the latest information.

Radio / Microcontroller

For specifications of the radio and microcontroller sections, please refer to the TWELITE Datasheet.

Each TWELITE UART includes the following TWELITE module:

Model Number	Included TWELITE
MW-B-UART-P	TWE-L-WX
MW-B-UART-U	TWE-L-U
MW-R-UART-P	MW-R-WX
MW-R-UART-U	MW-R-U

Antenna

The following data is for models with internal antennas (MW-(B/R)-UART-P).

For models with external antennas (MW-(B/R)-UART-U), please refer to the antenna datasheet.

Item	Specification
Antenna Type	MW-A-P1934 (Datasheet)
Gain (Typical Omnidirectional Plane)	`1.4[dBi]`
Polarization	Linear Polarization

Vertical Directional Pattern

Horizontal Directional Pattern

Certifications

	MW-B-UART-(P/U)	MW-R-UART-(P/U)
Certification Model	TWE-001 Lite	TWELITE RED
Construction Design Certification Number	007-AB0031	007-AF0062
FCC ID	2AINN-L1	-
IC ID	21544-L1	-
Remarks	RoHS Compliant	RoHS Compliant

Only MW-B-UART-(P/U) models are approved for overseas use.

Depending on the country of use, labeling such as FCC ID or IC ID may be required on the TWELITE or the product. Please contact us if you believe this applies.

Dimensions

MW-(B/R)-UART-P

PDF

MW-(B/R)-UART-U

PDF

Circuit Diagram

PDF

Characteristics

The following characteristics are specific to TWELITE UART or derived from component datasheets. For unspecified values, please refer to the respective datasheets.

Values are based on semiconductor datasheets.

TWELITE

For details, please refer to the TWELITE Datasheet.

Absolute Maximum Ratings

Parameter	Min	Max	Unit
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

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

Current Consumption

Condition	Typ	Unit
Sleep (RAMOFF, no timer)	0.1	uA
Sleep (RAMON, with timer)	1.5	uA
Tx (CPU doze) MW-B-UART-(P/U)	15.3	mA
Tx (CPU doze) MW-R-UART-(P/U)	23.3	mA
Rx (CPU doze) MW-B-UART-(P/U)	17.0	mA
Rx (CPU doze) MW-R-UART-(P/U)	14.0	mA

I/O Characteristics

Parameter	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 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

Precautions

Wiring Precautions

Inputting signals that do not meet I/O characteristics may damage the product.

For example, microcontrollers operating at 5V cannot be connected directly. Please use voltage level conversion (level shifting).

Also, RS232C cannot be connected directly due to different operating voltages. Use a signal converter between RS232C and UART.

General Notes

Please always evaluate and verify the product in your own usage environment.

For applications requiring high reliability or related to human life, please consult your distributor in advance.

Revision History

Version	Date	Details
1.0.2	2024/3/15	Added examples to Wiring Precautions
1.0.1	2024/2/27	Migrated to new site; minor corrections
1.0.0	2021/9/9	Initial Version