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As of 2025-07-24

TWELITE SPOT Datasheet

Latest Edition

The TWELITE® SPOT Wi-Fi gateway is a product that combines the low-power wireless microcontroller module TWELITE with the ESP32 wireless LAN microcontroller module. By developing firmware for the ESP32, it is possible to link the TWELITE network with the Wi-Fi network.

Please be sure to read Precautions before using the product.

For information on development, please refer to the Start Guide.

Features

Compact package (45mm x 70mm x 22mm)
Low power communication with many TWELITE series products via TWELITE NET
Dedicated parent and relay device apps (App_Wings) pre-installed on TWELITE
Equipped with widely used ESP32 wireless LAN module
Free Arduino-based firmware development environment (ESP32)
Arduino library MWings available for easy communication with TWELITE
Easy-to-use USB-C power supply
Case that can be easily mounted on walls with screws
Built-in PCB antenna
Approved under Japan’s ARIB STD-T66 technical standards (Giteki)
RoHS compliant (10 substances)

Model Number

The model number of TWELITE SPOT is as follows. Please check the sales model number on our website before purchasing.

Product Name	Model Number	Remarks
TWELITE SPOT	MW-B-SPOT-0

Major Components

TWELITE

TWELITE BLUE (TWE-L-WX)

TWELITE Dedicated Antenna

Item	Specification
Antenna Type	Inverted F Antenna (MW-A-P1934)
Gain (Typical on Omnidirectional Plane)	-4.0[dBi] (without case) / -3.0[dBi] (with case)
Polarization	Linear Polarization

Vertical Radiation Pattern

Horizontal Radiation Pattern

Wireless LAN Module

Espressif Systems ESP32-WROOM-32E

Please refer to Espressif Systems’ datasheet for detailed specifications.

The Wi-Fi module may be changed without notice.

Please refer to the Circuit Diagram in this document for the connection to TWELITE.

Enclosure

Takachi Electronics Industry SIM5-7-2W

The enclosure may be changed without notice.

Description of Components

① TWELITE

TWELITE is a wireless microcontroller module used for communication with other TWELITE modules.

② ESP32

Wireless LAN module by Espressif Systems.

③ 7P Interface (TWELITE)

Interface used for updating the TWELITE application. Normally not used.

This is the terminal to connect to TWELITE R3 / R2. Please connect with the correct orientation. Incorrect connection may cause damage.

Power supply is not provided from here. Power is supplied from the USB-C connector.

The following is the signal pin correspondence table:

Name	Signal Name	TWELITE	Description
GND	GND	20, 28, 30, 31, 32	GND
TXD	DIO6	8	UART (PC RX)
PRG	SPIMISO	2	Enter program mode at startup when Low level
RXD	DIO7	9	UART (PC TX)
RST	RESETN	21	Reset at Low level
VCC	-	-	Not connected (Power supplied from side)
SET	DIO12	13	Extended control signal

④ 7P Interface (ESP32)

Interface used for writing ESP32 applications. Normally used for firmware development.

This is the terminal to connect to TWELITE R3 / R2. Please connect with the correct orientation. Incorrect connection may cause damage.

Power supply is not provided from here. Power is supplied from the USB-C connector.

The following is the signal pin correspondence table:

Name	Signal Name	ESP32	Description
GND	GND	1, 38	GND
TXD	IO1	35	UART (PC RX)
PRG	IO0	25	Enter program mode at startup when Low level
RXD	IO3	34	UART (PC TX)
RST	EN	3	Reset at Low level
VCC	-	-	Not connected (Power supplied from side)
SET	IO2	24	Extended control signal

⑤ Reset Switch (TWELITE)

Resets TWELITE.

⑥ Reset Switch (ESP32)

EN switch of ESP32. Resets ESP32.

⑦ Boot Switch (ESP32)

BOOT switch of ESP32.

Pressing this switch while resetting puts ESP32 into programming mode.

⑧ LED (TWELITE)

Status LED for TWELITE.

In the parent/relay app, the LED lights up at startup or when receiving the command from the super-easy! standard app to pull DO1 Low.

⑨ LED (ESP32)

Status LED for ESP32.

In MWings, passing pin number 18 as the second argument to Twelite.begin() lights this LED at startup, on packet reception, and command transmission.

⑩ USB-C Connector

Power supply only. No signal lines connected.

⑪ Grove I2C Connector (ESP32)

Connected to ESP32’s I2C port (IO21, 22). Can be used to connect OLED displays, etc.

⑫ TWELITE PCB Antenna

MW-A-P1934 PCB antenna.

TWELITE dedicated 2.4GHz inverted F-type antenna formed by circuit patterns on the board.

⑬ Antenna Direction Mark

Indicates the polarization direction of the antenna.

Please align the antenna direction mark with that of the TWELITE series device you are communicating with as much as possible.

External Dimensions

Download the PDF file here

Use two M3 screws to mount on the wall.

Circuit Diagram

Download the PDF file here

Specifications

Recommended Operating Conditions

Item	Symbol	Condition	min	typ	max
Power Supply Voltage	V_CC	Compliant with USB spec	4.5	5.0	5.5	V
Operating Temperature	T_OPR	No condensation	0		60	°C
Operating Humidity	H_OPR	No condensation			85	%

Please refer to the datasheets of individual components for unspecified values.

Precautions

Changing TWELITE Settings

Frequency channels and other settings are changed from the ESP32. Unlike other products, interactive mode cannot be used from the 7P interface. Settings are done using the TWELITE dedicated Arduino library prepared for ESP32.

The 7P interface on the TWELITE side is only used for updating the SPOT dedicated parent app.

About the 7P Interface

Power supply is not provided from the 7P interface. When connecting TWELITE R series, please supply power from the USB-C connector.

About USB Power Supply

Please use an AC adapter that can supply 5V / 1A or more with low noise.

Connecting to a PC

When rewriting the ESP32 firmware, remove the cover of the TWELITE SPOT and connect the TWELITE R3 / R2 to the 7P interface (side marked ESP) as shown below.

Connect the TWELITE R3 / R2 in the same orientation as shown below. Incorrect connection may damage the TWELITE SPOT or TWELITE R3 / R2.

Installation

Please satisfy the following conditions as much as possible.

Point the antenna direction mark vertically (up/down)
- It is preferable to install with the antenna direction mark facing up, but facing down does not cause significant impact.
Align the antenna direction mark of TWELITE SPOT and the child device.
Do not place obstacles between TWELITE SPOT and child devices.

For detailed installation methods of the TWELITE series, please refer to the Installation Guide - For Good Communication.

Disposal

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

Revision History

Version	Date	Summary
1.0.1	2023/06/14	Added Precautions
1.0.0	2023/05/15	Initial Version