Midea IoT Module Specification

1. Product Overview

The MWB-S-WB01-2 is a fully functional, highly integrated, and low-power consumption Wi-Fi+BLE module dedicated for the Internet of Things, developed by Midea. The module features a built-in PCB antenna design, with a master chip highly integrated with memory, flash, Wi-Fi baseband, and Bluetooth baseband. It supports the IEEE802.11 b/g/n protocol and provides a UART communication interface for host device communication. It is suitable for applications in smart home equipment, remote monitoring equipment, and medical machinery.

The module has the following features:

• Main frequency supports 320MHz, SRAM 384KB, ROM 128KB, and 4M Flash.
• Supports IEEE 802.11b/g/n protocol.
• Supports 20MHz bandwidth in the 2.4GHz frequency band.
• Supports Bluetooth BLE 5.0.
• Supports encryption protocols: WEP, WPA, WPA2, WPA3, TKIP.
• On-board PCB antenna.
• Operating temperature: -20°C to 85°C.

Figure 1.1. Block diagram of the MWB-S-WB01-2 module scheme: The image shows a printed circuit board (PCB) with a central integrated circuit (IC) chip, a PCB antenna trace, and several connector pads labeled GND, TX, RX, VCC. Markings on the PCB include 'M-Smart', 'RoHS 94V-0', 'CMIIT ID', 'Power: DC 5V/0.5A', 'Model: MWB-S-WB01-2', and 'E-100M-S-BAN'.

2. Top View

Front view: The front view of the module shows the PCB with the 'M-Smart' logo, various components, and markings including 'CMIIT ID', 'Power: DC 5V/0.5A', and the model number. The rear view shows more components and connector pads labeled 'TX1', 'RX1', 'TX0', 'RX0', 'SEL', and 'GND'.

3. Radio Frequency (RF) Characteristics

3.1. Basic RF Parameters

3.2. RF Output Power

3.3. RF Receiver Sensitivity

3.4. Module Antenna Characteristics

The passive performance of the antenna for this module shall meet the following requirements:

The antenna drawing of the module is as follows: A dimensional drawing of the module's antenna area, showing key dimensions such as 1.00, 2.50, 3.00, 14.50, 0.50, 3.30, 4.30, and 5.70, indicating the physical layout and size constraints for antenna placement.

It is necessary to pay attention to the following points when the module antenna is placed:

• The module is recommended to be placed at the edge of the electronic control board, with the antenna facing outward, away from metal parts and high-frequency signal lines.
• Routing under the PCB antenna is forbidden, and clearance processing should be done. Routing of high-speed signals around and below the module shall be avoided. If the module cannot be avoided during routing, it is recommended to strictly follow the high-frequency signal routing rules and perform signal packaging processing on the high-speed signals.
• During installation, the front of the antenna shall avoid the metal shell or parts, so as not to shield the signal. Plastic shelter is allowed, but any interference between any object and the antenna is prohibited.

4. Product Structure Diagram

4.1. Interface Schematics

A diagram illustrating the top view of the module's terminal interface, showing four connection pads labeled 'GND', 'TX', 'RX', and 'VCC'.

Wiring instructions: The RXD and TXD pins of the Wi-Fi Bluetooth module are connected to the TXD and RXD pins at the communication end, and the VCC is connected to 5V level. GND refers to the grounding. After the module is powered on, the RX terminal is used for receiving and the TX terminal is used for transmitting.

4.2. Label Requirements

A diagram detailing the label dimensions (13.5*9.5mm) and content. It includes a two-dimensional barcode, the model number 'MWB-S-WB01-2', power supply 'DC 5V/0.5A', CMIIT ID, MAC address, and manufacturer 'Guangdong Midea Air-Conditioning Equipment Co., Ltd.'.

Label printing requirements: The label size is 13.5*9.5mm, which is white, in standard typeface of Chinese; the size of the two-dimensional code is 5*5mm.

Content of the two-dimensional code: The content of the two-dimensional barcode is described in the following table.

Note:

• Production information (26 digits): 02 XXXXXXXX 170608 000003 0000
• Digits 1-2: represent the production factory.
• Digits 3-10: represent the operation number of the factory.
• Digits 11-16: represent production date. For example, June 8, 2017 is marked as 170608.
• Digits 17-22: reserved.
• Digits 23-26: enterprise code. The internal division in Midea is "0000". Non-Midea enterprise code is based on the software code.
• Software version (12 digits): XXXXXXXXXXXX
• Power supply (4 digits): module working voltage.
• Current (5 digits): 500mA.
• Others: fill-in as required.
• CMIIT ID: fill-in as required.
• Code: It is the code prepared for the module by the centralized purchasing department of Midea.
• Digit segments are separated by ",";

4.3. Shield Cover Size

Dimensional drawings of the shield cover, showing its top, side, and front views. Key dimensions include lengths of 13.8mm, 9.9mm, and widths/heights of 6.29mm, 4.2mm, 0.1mm, 1.5mm, 1.8mm, and a diameter of 1.6mm for a hole.

Technical requirements:

• Material: Copper-Nickel-Zinc Alloy C7701, T=0.2mm, H=1.5mm
• The surface is clean, without burr, flash and other defects.
• Unless otherwise indicated, the dimension tolerance is ±0.1mm.
• Unless otherwise indicated, the corner angle is R0.2mm, and the bending inner angle is less than R0.2mm.

4.4. Pin Drawing

A drawing of the pin header connector, showing its top and side views. Dimensions include pin pitch of 2.54±0.1mm, header width B±0.25mm, and pin diameter SQ0.64±0.05mm. The drawing also indicates pin spacing and overall dimensions.

Technical requirements:

• Rated current: 3A
• Withstand voltage: AC 500V
• Operating temperature: -40°C to +105°C
• Insulation material: black PA6T
• Material: brass
• Plating: G/F Plated Over Nickel

5. Power Consumption

Power consumption in working mode (based on the 2-minute test results of the proposed version):

6. Electrical Parameters

6.1. Absolute Electrical Parameters

Power parameters: (ripple control within 100mV)

6.2. Operating Conditions

The product shall be supplied by ES1/PS1 power source.

7. Compliance Standards and Certifications

The Wi-Fi Bluetooth module shall comply with ROHS environmental assessment certification.

8. Precautions

The Wi-Fi Bluetooth module exposed in the air (The core board inside the module or the whole that is composed of the core board and the substrate) should at least meet the environmental conditions for ordinary consumer electronics, including but not limited to:

• Operating temperature: -20-85°C
• Storage temperature: -40-85°C
• Operating humidity: 0-95 % RH
• Storage humidity: 0-98 % RH
• The module can withstand the thermal shocks every 2h a cycle in the range of -20°C to +85°C.
• There should be no function failure or performance degradation in at least 20 cycles of shocks, without significant tin crack.
• The temperature rise of the circuit components should meet the requirements of their own specifications when operation is performed for long periods of time.
• In the simulation of the transportation process and home application scenarios, the module should be resistant to a certain degree of mechanical shock and drops.
• Through certain protection means, the Wi-Fi Bluetooth module can be provided with higher environmental adaptability. In the design of WiFi Bluetooth module, the margin of performance, size and process required for the implementation of protective means shall be reserved.

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

MODIFICATION: Any changes or modifications not expressly approved by the grantee of this device could void the user's authority to operate the device.

To satisfy FCC exterior labeling requirements, the following text must be placed on the exterior of the end product: "Contains Transmitter module FCC ID: 2ADQOMWBSWB012"

This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body.