MINEWSEMi ME52BS02 Bluetooth LE Module Owner's Manual

Q: What is the transmission speed supported by ME52BS02?
A: ME52BS02 supports a maximum transmission speed of up to 11kB/s in master-slave switching mode.
Q: Can ME52BS02 be used in Smart Home applications?
A: Yes, ME52BS02 can be utilized in Smart Home, Consumer Electronics, Intelligent Medical Care, Security Equipment, and Automotive Equipment applications.

Version Note

Part Number

Click the icon to view and download the latest product documents electronically. https://en.minewsemi.com/ﬁle/ME52BS02-OM6626_Datasheet_M_EN.pdf

ME52BS02-OM6626
Bluetooth master-slave pass-through module that supports master-slave switching, serial command conﬁguration, and iBeacon broadcast mode The ME52BS02 is a master-slave module that can switch between master and slave modes through commands. The master and slave modes cannot work simultaneously and only support one-to-one connections. By default, the device operates in master mode. In master mode, it can scan and connect to devices through commands. The scan can be conﬁgured to ﬁlter by broadcast name or MAC address to locate relevant devices. Connections can only be initiated by specifying the MAC address. The device communicates with an MCU via a UART interface. In command mode, the UART can be used to send commands to modify parameters such as scan interval, scan timeout, connection interval, broadcast interval, custom broadcast data, and baud rate. The MCU can send a command through UART to switch to slave mode. In slave mode, the device can be in broadcast or connection state, allowing the master device to connect and serve as a bridge for transparent data transmission between the master and the MCU.

FEATURES

KEY PARAMETERS

APPLICATION

BLOCK DIAGRAM

ELECTRICAL SPECIFICATION

CURRENT CONSUMPTION CHARACTERISTICS

The following power consumption test is conducted at room temperature with a power supply voltage of 3.3V. The power consumption of the master mode and the slave mode is inconsistent. When in slave mode, the power consumption is as follows: (broadcast interval is 1s, maximum and minimum connection interval is 20-40ms).

PIN DESCRIPTION

PIN DEFINITION

MODULE OPERATION INSTRUCTION

Tool
PC serial port assistant: Search and download “Serialport Utility” in your browser. The PC serial port assistant is used to debug the UART interface of the module.

Wiring

Power supply
The Module working voltage is 1.8V-3.6V.

SLP(Sleep/Wake)
When pull SLP low, the module in broadcast mode. BLE device can be found by smartphone APP, Device name: Minew_Vxxxxx(default) name, module can be connected with smartphone and enters connection mode. When pull SLP high, device will enter sleep mode.

Note： This pin cannot be left ﬂoating to avoid unpredictable errors.

BTDATA(UART Control)
The BTDATA pin is only valid when SLP is low. SLP is low, BTDATA is low, and when the module is in a broad-cast state, all UART data will be considered as instructions. When the module is connected, all data is considered transparent.

Note：This pin cannot be left ﬂoating to avoid unpredictable errors.

UART Interface:TX and RX
When both SLP and BTDATA in low level, UART port will be activated, the module TX and RX should be connected to MCU RX and TX, then start to communicate through UART.] During module testing, the TX and RX pins can be connected to a USB-to-UART module. This allows sending and receiving UART data through a PC serial port assistant.

Note: If a USB-to-UART module is not available, you can connect the TX and RX pins of two Bluetooth modules in reverse. Then, connect each module to a separate phone, and you can test data pass-through between the two devices.

CON_IND
CON_IND is used to indicate the connection status. It outputs a high level when connected and a low level in other states. This pin can be used to wake up the connected MCU, helping to save power.

FIFO_FULL
FIFO_FULL is used to indicate whether the cache is full or not. When sending large amounts of data from MCU to module, this pin can be used for status checking. If it is high, then the FIFO is full, and UART data should not be transmitted further to avoid packet loss.

Command Instructions
After connecting VCC and GND, grounding the SLP and BTDATA pins places the module in an unconnected state, meaning the module is in command mode with the UART enabled. Commands can be sent to set and query parameters.

For all device commands, the return messages are consistent:

A successful command returns: 54544D3A4F4B0D0A00 (TTM\r\n\0)
A failed command returns: 54544D3A4552500D0A00 (TTM\r\n\0)

After sending a valid setting command, parameters are applied immediately (note: baud rate settings only apply after a reset command is issued). However, these parameters are not retained on power down unless the reset command is sent, which saves them to ﬂash memory.
Below is the list of setting commands:

Note: The ﬁrst and second lines of the command correspond to the HEX format and ASCII format, respectively. When querying parameters, all returned values are in hexadecimal, so commands need to be parsed using hexadecimal numbers.

When SLP and BTDATA are grounded, the device operates in master mode. The relevant parameters for the master mode include scan timeout, scan interval, and connection interval. The command for setting the connection interval applies to both master and slave modes. However, scan timeout and scan interval are only effective in master mode.

Note: To make it easier to ﬁnd the device, RSSI, broadcast name, and MAC address ﬁltering features have been added. Only one of MAC address ﬁltering or broadcast name ﬁltering can be active at a time. Enabling MAC address ﬁltering will automatically disable broadcast name ﬁltering, and enabling broadcast name ﬁltering will automatically disable MAC address ﬁltering.

When functioning as a master, the device needs to send speciﬁc commands to enable Bluetooth operations, such as scanning and initiating a connection to a particular device. Once connected, during data transmission, all data packets are checked to determine if they contain a disconnect command.

Note: The above commands are only effective in master mode. If the device is not in master mode, sending these commands will return TTM: ERP\r\n\0.

For all other device commands, regardless of whether in master or slave mode, as long as the parameter requirements are met, the response will be TTM:OK\r\n\0 and the parameters will take effect in the corresponding role.
In master mode, the device can initiate a connection to a speciﬁed slave device using its MAC address, entering connection mode directly. When the MAC address of the target device is known, scanning is not necessary; you can simply send the connection command.
When switching from master mode to slave mode, the device must ﬁrst ensure it is in an unconnected state. You should invoke the command to set the role, followed by the reset command to successfully switch to the slave role, and vice versa.

When in slave mode, you can set and query many parameters of the broadcast process and connection process as follows:

Regardless of whether in master mode or slave mode, all conﬁguration commands require a reset command to take effect. Query commands will return the relevant parameters, while erroneous commands will return TTM:ERP\r\n\0. For the device as a whole, commands for baud rate and connection interval are effective in both master and slave modes.

Operation Examples

Factory Default Parameters

Broadcast Name: Minew_Vxxxxx
Serial port baud rate: 9600bps,8N1 Transmit power: 0dBm

Minimum and maximum connection interval:

20ms – 40ms
Device Role: Master

Default parameters related to master mode: Scanning timeout: 10s
Scanning interval: 100ms
Default parameters related to slave mode: Broadcast interval: 1s

Broadcast mode: transparent broadcast package Custom data: Minew Tech
Connection password enable: not enabled Connection password: minew123
Major: 0x1234

minor: 0x1235
UUID: 74278BDA-B644-4520-8F0C-720EAF059935 DC_ RC: No DCDC, internal 32k

Parameter Modiﬁcation Example
Connect all pins according to the wiring diagram, grounding SLP and BTDATA to put the device in an unconnected state. At this point, parameters can be set, and regardless of whether in master mode or slave mode, all parameters can be conﬁgured, taking effect immediately.

However, the effective parameters will only be reﬂected in the corresponding role. For example, if the broadcast name is modiﬁed while in master mode, the change will take effect, but it will only be visible when the device switches to slave mode. After sending the reset command, all parameters will be saved during power off.

Note: When you need to modify multiple parameters, you can send all the setting commands ﬁrst and then send the reset command.

When querying device parameters, the values are in hexadecimal format. If ASCII display is selected, the parameter positions may appear as garbled text. In this case, you should set it to HEX display. The parameters will correspond to the positions after “2D” in the output. To check the baud rate, make sure to use HEX display to view the speciﬁc parameters.

Scanning and Connecting to Devices
Send the 54544D3A5343414E (TTM:SCAN) command to scan for a device and obtain its MAC address. The scanned device returns MAC + broadcast name information. Send the 54544D3A434F4E4E2D201907230857 command and the module will connect the device with MAC address 20:19:07:23:08:57. The device connected will return TTM: CONN-MAC-XXXXXXXXXXXXX\r\n\0. Since MAC is a hexadecimal number, the entire command is sent as a hexadecimal number. Once connected you can perform data passthrough.

Master Pass-Through
Data passthrough is possible after the connected command is returned in step 7.3 The prerequisite for correct communication between the module and the slave device is that the slave device must have the same services, features, and their UUIDs and attributes as the module.

Relevant information is provided below:

As an example, the master module connects to the passthrough slave module and then sends the data after connecting.

Slave Broadcastin
After setting the device role to slave mode using the command TTM: ROL-0, data pass-through can occur with a mobile phone. When the SLP pin is low, the device is in broadcast mode. Using the nRF Connect app, you can scan for devices. Once the device is detected, click on “Raw” to view the raw data, which is the unparsed data from the scan. After parsing according to BLE data types, you can refer to the Details section. BLE broadcast data follows a speciﬁc format: Length + Type + Content. The content can vary, while the type is ﬁxed, and the length is determined by the content. The device has two broadcast formats: pass-through broadcast packets and iBeacon broadcast packets. Both formats include four types: Flag (0x01), Broadcast Name (0x09), Service Data (0x16), and Manufacturer Data (0xFF). The diagram below shows the pass-through broadcast packet: Flag, Broadcast Name, and Service Data are included in the broadcast data packet, while Manufacturer Data is found in the response data packet. The content of the Service Data includes the Service Data UUID (E1FF) and MAC Address. The Manufacturer Data consists of the Company ID (3906), Battery Level Information (1 byte), and Custom Data.

Note: The iOS side cannot access the MAC address ﬁeld, so the MAC address is placed back into the broadcast packet to ensure that the iOS app can retrieve the device’s MAC address. Additionally, WeChat Mini Programs cannot access the response data packet, so the MAC address is included in the service data of the broadcast packet to ensure that iOS devices using WeChat Mini Programs can also obtain the device’s MAC address.

The diagram below shows the iBeacon broadcast packet: Flag and Manufacturer Data are included in the broadcast data packet, while Service Data and Broadcast Name are found in the response data packet. The broadcast data packet must follow this ﬁxed format to comply with the iBeacon protocol deﬁnition.
In the Manufacturer Data, 4C 00 represents Apple’s Company ID, and 02 15 is the ﬁxed format for iBeacon, followed by the Proximity UUID (16 bytes), Major (2 bytes), Minor (2 bytes), and Measured Power (1 byte).

In iBeacon broadcast mode, the Manufacturer Data can only have the Proximity UUID, Major, and Minor values modiﬁed.
The Service Data consists of the Service Data UUID (FFE1), Battery Level Information, and MAC Address.

Slave Pass-Through
Based on 6.3.5, when connecting the device using a mobile app, keep the BTDATA pin low to enable data pass-through. If BTDATA is not low, it does not affect the device’s broadcasting and connection capabilities; it simply prevents pass-through functionality.

Using nRF Connect, you can view the speciﬁc Service, Characteristic, and their corresponding Properties The UUID consists of an Alias UUID (2 bytes, located at the 3rd and 4th bytes in the ﬁgure) combined with a Base UUID (the remaining 14 bytes). In the pass-through program, the services and characteristics utilize a standard base UUID, and the following explanation will use the Alias UUID for clariﬁcation.

FFF0 is the Service UUID. FFF1 is for data received by the phone, with the module sending data. FFF2 is for data sent by the phone, with the module receiving data

MECHANICAL DRAWING

Default unit： mm Default tolerance：±0.15

Note: The recommended pad size is 1.8 x 0.8 mm, with the pad extending 0.5 mm outward.

ELECTRICAL SCHEMATIC

Notice:Before placing an order, please conﬁrm the speciﬁc conﬁguration required with the salesperson.

PCB LAYOUT

There should be no GND plane or metal cross-wiring in the module antenna area, and no components should be placed nearby. It is best to make a hollow or clear area, or place it on the edge of the PCB board. The reference example is as follows:

Notice: It is strongly recommended to use the ﬁrst design method. The module antenna design is debugged according to the ﬁrst wiring.

Layout Notes：

The module’s antenna area should be completely clear of any metal obstructions to avoid affecting antenna performance (as shown in the diagram).
Outside the module’s antenna area, try to maintain a solid copper pour to minimize interference from the mainboard signal lines or other sources.

A clear area of at least 4 mm should surround the module’s antenna (including its casing) to reduce interference with the antenna.
Ensure good grounding for components to minimize parasitic inductance.
Do not place copper under the module’s antenna to prevent interference with signal radiation, which could affect transmission distance.

The antenna should be kept away from other circuits to maintain radiation efﬁciency and avoid impacting the normal operation of other circuits.
Position the module as close to the edge of the circuit board as possible, away from other circuitry.
It is recommended to use a ferrite bead for isolation when connecting the module to the power supply.

REFLOW AND SOLDERING

Perform SMT according to the reﬂow oven temperature proﬁle provided below, with a maximum temperature of 260°C;
) Follow IPC/JEDEC standards; Peak temperature: < 260°C; Number of reﬂows: ≤2 times; For SMT involving double-sided placement, it is recommended that the module side undergoes reﬂow soldering only once. For any special processes, please contact our company.
For module SMT, it is recommended to use a local stepped stencil with a thickness of 0.2 mm, and then open the area by 0.8 mm.

After opening, if the entire package is not used at once, it should be stored in a vacuum to prevent long-term exposure to air, which can cause moisture absorption and pad oxidation. If there is a gap of 7 to 30 days before reuse, it is recommended to bake the tape at 65-70°C for 24 hours without unrolling it before returning to SMT.
ESD protection measures should be implemented before using SMT.

PACKAGE INFORMATION

Remarks
General material list for FCL packaging:

Other:
Moisture-proof label (attached to the vacuum bag) Certiﬁcation label (attached to the vacuum bag) Outer box label

Default unit：mm Default tolerance：±0.1

Note: Default weight tolerance all are within 10g（except the special notes）

STORAGE CONDITIONS

Please use this product within 6 months after signing the receipt.This product should be stored without opening the package at an ambient temperature of 5~35°C and a humidity of 20~70%RH.

This product should be left for more than 6 months after receipt and should be conﬁrmed before use.
The product must be stored in a non-corrosive gas (CI2, NH3, SO2, NOx, etc.).
To avoid damaging the packaging material, do not apply any excessive mechanical shocks, including but not limited to sharp objects adhering to the packaging material and product dropping.

This product is suitable for MSL2 (based on JEDEC standard J-STD-020).

After opening the package, the product must be stored at ≤30°C/<60%RH. It is recommended to use the product within 3-6 months after opening the package.
When the color of the indicator in the package changes, the product should be baked before welding.

Baking is not required for one year if exposure is limited to <30°C and 60%RH. Refer to MSL2 for exposure criteria for moisture sensitivity level. If exposed to (≥168h@85°C/60%RH) conditions or stored for more than one year, recommended baking conditions.

120 +5/-5°C, 8 hours, 1 time
Products must be baked individually on heat-resistant trays because the materials (base tape, reel tape, and cover tape) are not heat-resistant, and the packaging material may be deformed at temperatures of 120℃;
90℃ +8/-0℃，24hours，1times
The base tape can be baked together with the product at this temperature. Please pay attention to the uniformity of heat.

HANDLING CONDITIONS

Be careful in handling or transporting products because excessive stress or mechanical shock may break products.
Handle with care if products may have cracks or damages on their terminals. If there is any such damage, the characteristics of products may change. Do not touch products with bare hands that may result in poor solder ability and destroy by static electrical charge.

QUALITY

Cognizant of our commitment to quality, we operate our own factory equipped with state-of-the-art production facilities and a meticulous quality management system. We hold certiﬁcations for ISO9001, ISO14001, ISO27001, OHSA18001, BSCI.
Every product undergoes stringent testing, including transmit power, sensitivity, power consumption, stability, and aging tests. Our fully automated module production line is now in full operation, boasting a production capacity in the millions, capable of meeting high-volume production demands.

COPYRIGHT STATEMENT

This manual and all the contents contained in it are owned by Shenzhen Minewsemi Co., Ltd. and are protected by Chinese laws and applicable international conventions related to copyright laws. The certiﬁed trademarks included in this product and related documents have been licensed for use by MinewSemi. This includes but is not limited to certiﬁcations such as BQB, RoHS, REACH, CE, FCC, BQB, IC, SRRC, TELEC, WPC, RCM, WEEE, etc. The respective textual trademarks and logos belong to their respective owners. For example, the Bluetooth® textual trademark and logo are owned by Bluetooth SIG, Inc. Other trademarks and trade names are those of their respective owners. Due to the small size of the module product, the “®” symbol is omitted from the Bluetooth Primary Trademarks information in compliance with regulations.

The company has the right to change the content of this manual according to the technological development, and the revised version will not be notiﬁed otherwise. Without the written permission and authorization of the company, any individual, company, or organization shall not modify the contents of this manual or use part or all of the contents of this manual in other ways. Violators will be held accountable in accordance with the law.

FCC warning

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

Note: 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 FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Requirement per KDB996369 D03

List of applicable FCC rules

List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15
Subpart since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.10 below concerning the need to notify host manufacturers that further testing is required.3

Explanation: This module meets the requirements of FCC part 15C(15.247).

Summarize the specific operational use conditions
Describe use conditions that are applicable to the modular transmitter, including for example any limits on antennas, etc. For example, if point-to-point antennas are used that require reduction in power or compensation for cable loss, then this information must be in the instructions. If the use condition limitations extend to professional users, then instructions must state that this information also extends to the host manufacturer’s instruction manual. In addition, certain information may also be needed, such as peak gain per frequency band and minimum gain, specifically for master devices in 5 GHz DFS bands.

Explanation: The EUT has a PCB Antenna, , and the antenna use a permanently attached antenna which is not replaceable.

Limited module procedures
If a modular transmitter is approved as a “limited module,” then the module manufacturer is responsible for approving the host environment that the limited module is used with. The manufacturer of a limited module must describe, both in the filing and in the installation instructions, the alternative means that the limited module manufacturer uses to verify that the host meets the necessary requirements to satisfy the module limiting conditions. A limited module manufacturer has the flexibility to define its alternative method to address the conditions that limit the initial approval, such as: shielding, minimum signaling amplitude, buffered modulation/data inputs, or power supply regulation. The alternative method could include that the limited module manufacturer reviews detailed test data or host designs prior to giving the host manufacturer approval.

This limited module procedure is also applicable for RF exposure evaluation when it is necessary to demonstrate compliance in a specific host. The module manufacturer must state how control of the product into which the modular transmitter will be installed will be maintained such that full compliance of the product is always ensured. For additional hosts other than the specific host originally granted with a limited module, a Class II permissive change is required on the module grant to register the additional host as a specific host also approved with the module. Explanation: The module is not a limited module.

Trace antenna designs
For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements.

Information that includes permitted variances (e.g., trace boundary limits, thickness, length, width, shape(s), dielectric constant, and impedance as applicable for each type of antenna);
Each design shall be considered a different type (e.g., antenna length in multiple(s) of frequency, the wavelength, and antenna shape (traces in phase) can affect antenna gain and must be considered);
The parameters shall be provided in a manner permitting host manufacturers to design the printed circuit (PC) board layout;
Appropriate parts by manufacturer and specifications;
Test procedures for design verification; and
Production test procedures for ensuring compliance.

The module grantee shall provide a notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify the module grantee that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the grantee, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application.

Explanation: Yes, The module with trace antenna designs, and This manual has been shown the layout of trace design,, antenna, connectors, and isolation requirements.

RF exposure considerations
It is essential for module grantees to clearly and explicitly state the RF exposure conditions that permit a host product manufacturer to use the module. Two types of instructions are required for RF exposure information:

To the host product manufacturer, to define the application conditions (mobile, portable – xx cm from a person’s body); and
Additional text needed for the host product manufacturer to provide to end users in their end-product manuals. If RF exposure statements and use conditions are not provided, then the host product manufacturer is required to take responsibility of the module through a change in FCC ID (new application).

Explanation: This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment, This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body.” This module is designed to comply with the FCC statement, FCC ID is:2BDJ6-ME52BS02.

Antennas
A list of antennas included in the application for certification must be provided in the instructions. For modular transmitters approved as limited modules, all applicable professional installer instructions must be included as part of the information to the host product manufacturer. The antenna list shall also identify the antenna types (monopole, PIFA, dipole, etc. (note that for example an “omni-directional antenna” is not considered to be a specific “antenna type”)).

For situations where the host product manufacturer is responsible for an external connector, for example with an RF pin and antenna trace design, the integration instructions shall inform the installer that unique antenna connector must be used on the Part 15 authorized transmitters used in the host product. The module manufacturers shall provide a list of acceptable unique connectors. Explanation: The EUT has a PCB Antenna, , and the antenna use a permanently attached antenna which is unique.

Label and compliance information
Grantees are responsible for the continued compliance of their modules to the FCC rules. This includes advising host product manufacturers that they need to provide a physical or e-label stating “Contains FCC ID” with their finished product. See Guidelines for Labeling and User Information for RF Devices – KDB Publication 784748.
Explanation:The host system using this module, should have label in a visible area indicated the following texts: “Contains FCC ID: 2BDJ6-ME52BS02.

Information on test modes and additional testing requirements5
Additional guidance for testing host products is given in KDB Publication 996369 D04 Module Integration Guide. Test modes should take into consideration different operational conditions for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. The grantee should provide information on how to configure test modes for host product evaluation for different operational conditions for a stand-alone modular transmitter in a host, versus with multiple, simultaneously transmitting modules or other transmitters in a host. Grantees can increase the utility of their modular transmitters by providing special means, modes, or instructions that simulates or characterizes a connection by enabling a transmitter. This can greatly simplify a host manufacturer’s determination that a module as installed in a host complies with FCC requirements.
Explanation: Topband can increase the utility of our modular transmitters by providing instructions that simulates or characterizes a connection by enabling a transmitter.

Documents / Resources

	MINEWSEMi ME52BS02 Bluetooth LE Module [pdf] Owner's Manual 2BDJ6-ME52BS02, 2BDJ6ME52BS02, ME52BS02 Bluetooth LE Module, ME52BS02, Bluetooth LE Module, LE Module, Module
	MINEWSEMI ME52BS02 Bluetooth LE Module [pdf] Owner's Manual ME52BS02, 2BDJ6-ME52BS02, 2BDJ6ME52BS02, ME52BS02 Bluetooth LE Module, ME52BS02, Bluetooth LE Module, LE Module, Module

References

User Manual

MINEWSEMi ME52BS02 Bluetooth LE Module

Product Usage Instructions