2ADQOMDA6K21-22.4G Bluetooth Communication Module

Midea IoT Division 1/14 Midea IoT Division MDA6K21-2 Single Bluetooth Module Specification Manufacturer Name: Midea IoT Division Module Name: 2.4G Bluetooth Communication Module Model: MDA6K21-2 Material code: XXXXXXXXXXXXXXXXX Prepared by: Countersigned by: Reviewed by: This document is confidential information and the final interpretation of all information content contained herein belongs to Midea IoT Division. All copy without authorization and permission is not recognized and should be prohibited. Midea IoT Division Address: Midea Global Innovation Center, Shunde District, Foshan, Guangdong Province, China Tel: Midea IoT Division 2/14 Table of Contents 1. Product Overview ................................................................................................................ 3 2. Top view .............................................................................................................................. 4 3. Radio Frequency (RF) Characteristics ................................................................................. 5 3.1 Transmit (Tx) and Receive (Rx) Characteristics .................................................. 5 3.2 Module Antenna Characteristics ........................................................................... 6 4. Product Structure Diagram .................................................................................................. 7 4.1. PCB size ............................................................................................................... 7 4.2. Interface ................................................................................................................ 8 4.3. Label Requirements .............................................................................................. 9 4.5. Physical Photos ................................................................................................... 11 5. Power Consumption ........................................................................................................... 11 6. Electrical Parameters ......................................................................................................... 12 7 Compliance Standards and Certifications .......................................................................... 12 8. Precautions ......................................................................................................................... 12 8.1 Environmental temperature ................................................................................ 12 8.2 Antenna Layout .................................................................................................. 13 Midea IoT Division 3/14 1. Product Overview MDA6K21-2 is a single Bluetooth solution designed by using BK3431Q_QFN32, and supports BLE 5.0, built-in ARM968E-S core, and 64K RAM. It can support the Bluetooth long-distance transmission and mesh network. ⚫ The features are as follows: ⚫ Supports BLE5.0; ⚫ Supports 512KB Flash and 64KB RAM; ⚫ Support; 16MHz reference clock; ⚫ Supports the mesh networking; The application scenarios are as follows: ➢ Smart Home; ➢ Smart wearable devices; ➢ Instruments and meters ➢ Intelligent transportation ➢ Smart medical ➢ Security devices ➢ Automotive devices ➢ Remote control Midea IoT Division 4/14 2. Top view Front view Rear view Midea IoT Division 5/14 3. Radio Frequency (RF) Characteristics 3.1 Transmit (Tx) and Receive (Rx) Characteristics Table 1: Tx characteristics TX Characteristic Min. Typ. Max. Unit 1. Frequency range 2402 - 2480 MHz 2. Output power -20 5.5 7 dBm 3. Carrier Frequency Offset and Drift 1)Frequency Offset -150 150 KHz 2)Frequency Drift -50 50 KHz 3)Max Drift Rate -20 20 Hz/us 4. Modulation Characteristic △f1avg 225 275 KHz △f2max 185 KHz △f1avg/△f2avg 0.8 1 Hz/Hz 5. In-band Spurious Emission ±2M Offset -20 dBm ＞±3MHz offset -30 dBm Table 2: Rx characteristics RX Characteristic Min. Typ. Max. Unit 1. Frequency range 2402 - 2480 MHz 2. Receiver Sensitivity -94 -97 dBm 3.Max Input -10 dBm 4. C/I Co-channel 7 dB 5. C/I 1MHz -9 6 dB 6. C/I 2MHz -44 dB 7. C/I ≥3MHz -50 dB 8. C/I Image channel -25 - dB Midea IoT Division 6/14 9. C/I Image 1MHz -35 dB 10.Out-of-band blocking @2399 and 2484MHz -15 dBm 2000MHz to 3000MHz -15 dBm 3.2 Module Antenna Characteristics The passive performance of the antenna of the Bluetooth module should meet the following requirements (because the passive performance can only be used as a reference, the antenna performance test is based on the active throughput test). Parameter 2400MHz-2484MHz (in the 2.4G band) Return loss <-10dB Efficiency >40% Frequency 2400MHz 2450MHz 2480MHz VSWR 1.26 1.44 1.89 Frequency 2400MHz 2450MHz 2480MHz S11 -18.58 -14.75 -10.22 Frequency Efficiency Peak Gain(dBi) 2400MHz 41.72% -0.3 2450MHz 48.1% 0.79 2480MHz 41.77% 0.25 Midea IoT Division 7/14 4. Product Structure Diagram 4.1 PCB size PCB thickness: 1.0mm Tolerance: ±0.2mm Material: FR-4 Midea IoT Division 8/14 4.2 Interface Figure 2.1 Terminal Interface Table 2.1 Description of Terminal Interface No. Symbol Description of Wi-Fi module terminal pin 1 V VCC (Power supply) 2 R RXD (Module receive) Midea IoT Division 9/14 3 T TXD (Module transmit) 4 GND symbol GND (Ground) 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. The VCC is connected to 5V level. GND refers to the grounding. After the module is powered on, it implements the receiving via RXD and transmitting via TXD. 4.3. Label Requirements Label printing requirements: Label size is 13.5 * 8.5 mm. Label is white in Song font. Two-dimensional barcode: The content of the two-dimensional barcode is described in the following table. Content of the two-dimensional code Field Character length Remarks CMIITID 10 The content is fixed as "2019DP0665" MAC address 16 Format is fixed as "MAC:XXXXXXXXXXXXXXX" Two- dimensional barcode area Power supply Guangdong Midea Air-Conditionin…

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GD Midea Air-Conditiong Equipment Co., Ltd. Date (23/07/2021) TUV SUD BABT UNLIMITED TCB. Octagon House, Segensworth North, Fareham, Hampshire, PO15 5RL, United Kingdom Dear Sir or Madam, We, GD Midea Air-Conditiong Equipment Co., Ltd. Lingang Road, Beijiao, Shunde Foshan China, hereby authorize Warlen Song TUV SUD Shenzhen Branch ([email protected]) to act as our agent in all matters relating to applications for equipment authorization, including the signing of all documents relating to these matters. Type of equipment: 2.4G Bluetooth Communication Module Model name: MDA6K21-2 FCC ID: 2ADQOMDA6K21-2 This authorization expires on 2022-07-23. Sincerely, Company Officer: Jim Xu Telephone Number: 0757-26339413 Email: [email protected]

GD Midea Air-Conditiong Equipment Co., Ltd Date (23/07/2021) TUV SUD BABT UNLIMITED TCB Octagon House, Segensworth North, Fareham, Hampshire, PO15 5RL, United Kingdom Confidentiality Request FCC ID: 2ADQOMDA6K21-2 Pursuant to Sections 0.457(d)(1)(ii) and 0.459 of the Commission’s Rules, (GD Midea Air- Conditioning Equipment Co., Ltd.) hereby requests permanent confidential treatment of information accompanying this application as outlined below: Common exhibits for which confidentiality is requested are: Schematics Bill of Materials/BOM Block Diagrams Theory of Operation] (GD Midea Air-Conditioning Equipment Co., Ltd.) also hereby requests short-term confidential treatment of information accompanying this application as outlined below for a period of (up to 180) days: Common exhibits for which short-term confidentiality is requested are: Internal Photos External Photos User Manual Test Set-up Photographs The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Yours sincerely, Company Officer: Jim Xu Telephone Number: 0757-26339413 Email: [email protected]

Example of Modular Approval request letter (for TCB – TCB approval): GD Midea Air-Conditiong Equipment Co., Ltd Date (23/07/2021) TUV SUD BABT UNLIMITED TCB Octagon House, Segensworth North, Fareham, Hampshire, PO15 5RL, United Kingdom Dear Sir/Madam, RE: Modular Approval Request for Model: FCC ID: 2ADQOMDA6K21-2 The following attestation addresses the requirements to support modular approval: Modular approval requirement Yes No * (a) The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must be on the module assembly Yes (b) The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal Yes (c) The module must contain power supply regulation on the module Yes (d) The module must contain a permanently attached antenna, or contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) Yes (e) The module must demonstrate compliance in a stand-alone configuration Yes (f) The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) Yes (g) The module must comply with all specific rules applicable to the transmitter. The grantee must provide comprehensive instructions to explain compliance requirements Yes (h) The module must comply with RF exposure requirements Yes * Please provide a detailed explanation if the answer is “No.” Yours sincerely, Name: Jim Xu Telephone Number: 0757-26339413 Email: [email protected]

Label location

RF Antenna

TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R. China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299 Report No: 68.950.21.0496.01 RF exposure Estimation 1. Introduction Product: 2.4G Bluetooth Communication Module Models no.: MDA6K21-2 FCC ID: 2ADQOMDA6K21-2 The Equipment Under Test (EUT) is BT Module supports BLE function. 2. Limit and Guidelines on Exposure to Electromagnetic Fields According to§15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. According to KDB 447498 D01 Mobile Portable RF Exposure v05r01, no SAR required if power is lower than the flowing threshold: The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where • f(GHz) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation25 • The result is rounded to one decimal place for comparison • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. 3. Calculation method [(max. power of` channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 Conducted Power + tune up tolerance =4.72dBm= 2.96mW Distance = 5 mm f = 2.480 GHz [2.96/5] * SQRT (2.480) =0.932 0.932≤ 3.0 Therefore, excluded from SAR testing. - TÜV SÜD Shenzhen LTD. - Reviewed by: Prepared By: John Zhi/EMC Project Manager Warlen Song/EMC Project Engineer Date: 2021-08-09 Date: 2021-08-09

Report Number: 68.950.21.0495.01 EMC_SZ_FR_23.03 FCC Release 2017-06-20 TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R. China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299 Page 1 of 35 FCC - TEST REPORT Report Number : 68.950.21.0495.01 Date of Issue: 2021-08-09 Model : MDA6K21-2 Product Type : 2.4G Bluetooth Communication Module Applicant : GD Midea Air-Conditioning Equipment Co., Ltd. Address : Lingang Road, Beijiao, Shunde 528311 Foshan, Guangdong PEOPLE'S REPUBLIC OF CHINA Manufacturer : GD Midea Air-Conditioning Equipment Co., Ltd. Address : Lingang Road, Beijiao, Shunde 528311 Foshan, Guangdong PEOPLE'S REPUBLIC OF CHINA Test Result : ◼ Positive  Negative Total pages including Appendices : 35 TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch is a subcontractor to TÜV SÜD Product Service GmbH according to the principles outlined in ISO 17025. TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch reports apply only to the specific samples tested under stated test conditions. Construction of the actual test samples has been documented. It is the manufacturer's responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. The manufacturer/importer is responsible to the Competent Authorities in Europe for any modifications made to the production units which result in non-compliance to the relevant regulations. TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch shall have no liability for any deductions, inferences or generalizations drawn by the client or others from TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch issued reports. This report is the confidential property of the client. As a mutual protection to our clients, the public and ourselves, extracts from the test report shall not be reproduced except in full without our written approval Report Number: 68.950.21.0495.01 EMC_SZ_FR_23.03 FCC Release 2017-06-20 TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R. China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299 Page 2 of 35 1 Table of Contents 1 Table of Contents ................................................................................................................................................................ 2 2 Details about the Test Laboratory ..................................................................................................................................... 3 3 Description of the Equipment Under Test........................................................................................................................ 4 4 Summary of Test Standards .............................................................................................................................................. 5 5 Summary of Test Results ................................................................................................................................................... 6 6 General Remarks ................................................................................................................................................................ 7 7 Test Setups .......................................................................................................................................................................... 8 8 Systems test configuration ................................................................................................................................................. 9 9 Technical Requirement .................................................................................................................................................... 10 9.1 Conducted Emission ................................................................................................................................................ 10 9.2 Conducted peak output power................................................................................................................................ 13 9.3 Power spectral density ............................................................................................................................................. 15 9.4 6 dB Bandwidth and 99% Occupied Bandwidth .................................................................................................. 17 9.5 Spurious RF conducted emissions ........................................................................................................................ 20 9.6 Band edge ................................................................................................................................................................. 25 9.7 Spurious radiated emissions for transmitter ......................................................................................................... 27 10 Test Equipment List ...................................................................................................................................................... 34 11 System Measurement Uncertainty ............................................................................................................................. 35 Report Number: 68.950.21.0495.01 EMC_SZ_FR_23.03 FCC Release 2017-06-20 TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R. China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299 Page 3 of 35 2 Details about the Test Laboratory Details about the Test Laboratory Test Site 1 Company name: TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch Building …

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Test Setup Photos Conducted Emission Spurious radiated emissions below 1G Spurious radiated emissions 1G to 18G Spurious radiated emissions Above 18G