meross MR2EHKB WiFi and Bluetooth Module User Manual

meross MR2EHKB WiFi and Bluetooth Module User Manual

Product Description

MR2EHKB module utilizes the Realtek RTL8710 chip, supporting IEEE 802.11b/g/n (2.4GHz band 1T1R 150Mbps). The module has a total of 11 pins/pads, providing up to 9 GPIOports. Some GPIO pins can be multiplexed with other interfaces, such as a maximumof 7 PWMinterfaces, 2 serial ports, and 1 I2C interface.
The module is powered externally at 3.3VDC, with the external power supply needing to support a maximum of 300mA current. It is recommended to use a switching power supply scheme of 1MHz or higher to provide better dynamic response. When selecting the power scheme, be cautious of any noticeable drop or jitter in the 3.3VDC voltage during initial power-on, as this could prevent successful module reset and startup. The module is primarily used in smart home-related devices, including smart sockets, wall switches, light bulbs, and more.

Product Features

• Dual-Mode Support
  MR2EHKB offers simultaneous Wi-Fi and BLE operation, providing devices with dual communication options

• Wireless Connectivity
  Stable Wi-Fi and BLE connections enable wireless communication between devices and networks.

• Low Power Modes
  Multiple low-power modes extend battery life, suitable for energy-saving and mobile devices

• Security
  Supports various security protocols including WPA2, AES, and BLE security features, ensuringdata confidentiality and integrity.

• Cross-Platform Compatibility
  Develop and deploy across multiple operating systems and platforms, providing versatility for various applications.

Dimensions and Packaging

The side view dimensions of the module are shown in the diagram: The module’s PCB thickness is 0.8mm, with components on top reaching a maximum height of 1.0mm. Spatial requirements are recommended to be above 3mm. (Default without shielding cover, device surfaces directlycovered by module label.

Product Specification

• electrical parameters

• normal operating conditions

Parameter| Description| Min| Typical Value| Max| Unit
---|---|---|---|---|---
VCC| Supply Voltage| 2.97| 3.3| 3.63| V
VIO| Input Level| -0.3| –| 3.63| V
VIL| Low-Level Input| -0.3| –| VCC0.25| V
VIH| Hight-Level Input| VCC0.75| –| VCC| V
VOL| Low-Level Output| 0| –| VCC0.15| V
VOH| High-Level Output| VCC0.85| –| VCC| V
IIO| Driving Current| 4| –| 16| mA
TC| Operating Temperature| -20| –| 85| °C

FCC Statement

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.

This equipment 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

Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

This module has been assessed against the following FCC rule parts: CFR 47 FCC Part 15 C(15.247, DTS).It is applicable to the modular transmitter

This radio transmitter 2AMUU-MWA05 has been approved by Federal Communications Commission to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the intercommunicated for any type listed are strictly prohibited for use with this device. The concrete contents to check are the following three points.

1. Must use a PCB antenna with gain not exceeding those shown in the table below.
2. Should be installed so that the end user cannot modify the antenna
3. Feed line should be designed in 50ohm

Fine-tuning of return loss etc. can be performed using a matching network. The antenna shall not be accessible for modification or change by the end user

The module complies with FCC Part 15.247 and apply for Single module approval.

Trace antenna designs: Not applicable. The device must be professionally installed The intended use is generally not for the general public. It is generally for industry/commercial use.

The connector is within the transmitter enclosure and can only be accessed by disassembly of the transmitter which is not normally required. the user has no access to the connector. Installation must be controlled. Installation requires

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of therebetween the radiator & your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Antenna type and antenna gain:

Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as “Contains FCC ID: 2 AMUU MWA 05”; any similar wording that expresses the same meaning may be used.

Testing of the host product with all the transmitters installed – referred to as the composite investigation test- is recommended, to verify that the host product meets all the applicable FCC rules. The radio spectrum is to be investigated with all the transmitters in the final host product functioning to determine that no emissions exceed the highest limit permitted for any one individual transmitter as required by Section 2.947(f). The host manufacturer is responsible to ensure that when their product operates as intended it does not have any emissions present that are out of compliance that were not present when the transmitters were tested individually. If the modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions)

The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration.

Any company of the host device which installs this modular should perform the test of radiated &conducted emission and spurious emission etc. according to FCC Part 15C: 15.247 and 15.209 &15.207, 15B class B requirement, only if the test result complies with FCC part 15C: 15.247 and 15.209 & 15.207, 15B class B requirement. Then the host can be sold legally.
The host product manufacturer is responsible for compliance with any other FCC rules that applyto the  host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.

The host manufacture is recommended to use D04 Module Integration Guide recommending as “best practice” RF design engineering testing and evaluation in case non-linear interactions generate additional non-compliant limits due to module placement to host components or properties.

This module is stand-alone modular. If the end product will involve the Multiple simultaneouslytransmitting conditioner different operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module manufacturer for the installation method in end system.

Canada Statement

This device complies with Industry Canada’s license-exempt RSSs. Operation is subject to the following two conditions:

1. This device may not cause interference; and
2. This device must accept any interference, including interference that may cause undesired operation of the device.

Please notice that if the ISED certification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must alsodisplay a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains IC:24963-MWA05” any similar wording that expresses the same meaning may be used.

The device meets the exemption from the routine evaluation limits in section 2.5 of RSS 102 and compliance with RSS-102 RF exposure, users can obtain Canadian information on RF exposure and compliance.

This radio transmitter-MWA05 has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain

Antenna type and antenna gain:
2.4G WIFI Antenna

Notice to OEM integrator

Must use the device only in host devices that meet the FCC/ISED RF exposure category of mobile, which means the device is installed and used at distances of at least 20cm from persons.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
The end user manual shall include FCC Part 15 /ISED RSS GEN compliance statements related to the transmitter as show in this manual(FCC/Canada statement).

Host manufacturer is responsible for compliance of the host system with module installed with all other applicable requirements for the system such as Part 15 B, ICES 003.
Host manufacturer is strongly recommended to confirm compliance with FCC/ISED requirements for the transmitter when the module is installed in the host.

The use condition limitations extend to professional users, then instructions must state that this information also extends to the host manufacturer’s instruction manual.

This module is stand-alone modular. If the end product will involve Multiple simultaneously transmitting condition or different operational conditions for a stand-alone modular transmitter in a host, host manufacturer has to consult with module manufacturer for the installation method in the end system.

Any company of the host device which install this modular should perform the test of radiated & condicted emission and spurious emission etc. according to FCC Part 15C: 15.247 and 15.209 & 15.207, 15B class B requirement, only if the test result comply with FCC part 15C: 15.247 and 15.209 & 15.207,15B class B requirement. Then the host can be sold legally.
This modular transmitter is only FCC authorized for the specific rule parts ( 47CFR Part 15.247) listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification.
Host manufacturer is strongly recommended to confirm compliance with FCC/ISED requirements for the transmitter when the module is installed in the host.
Must have on the host device a label showing Contains FCC ID: 2AMUU-MWA05 or IC:24963-MWA05
Both FCC ID and IC ID are not to be placed on the host at the same time and only hosts going into the US can use the FCC ID and only hosts going into Canada can use the IC ID.

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