2AVTT-XR21A2.4G WIFI module

XR‐21A W IFI modu le Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved   XR-21AUsermanual      Ver sionV1 Copyright©2019 XR‐21A WIFI mo dule Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved  Page 1 of 14 This device is intended only for OEM integrators under the following conditions: 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2) This device and its antenna(s) must not be co‐located with any other transmitters except in accordance with FCC multi‐transmitter product procedures. Referring to the multi‐transmitter policy, multiple‐transmitter(s) and module(s) can be operated simultaneously without C2P. 3) For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by supplied firmware programming tool. OEM shall not supply any tool or info to the end‐user regarding to Regulatory Domain change. USERS MANUAL OF THE END PRODUCT: In the users manual of the end product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated. The end user has to be informed that the FCC radio‐frequency exposure guidelines for an uncontrolled environment can be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment . If the size of the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is required to be available in the users manual: This device complies with Part 15 of FCC rules. Operation is subject to the following two co nditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. LABEL OF THE END PRODUCT: The final end product must be labeled in a visible area with the following " Contains FCC ID:2AVTT-XR21A ". If the size of the end product is larger than 8x10cm, then the following FCC part 15.19 statement has to also be available on the label: This device complies with Part 15 of 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.      XR‐21A WIF I module  Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved Page 2 of 14 1. Product Overview XR‐21A WiFi module was developed for a wide range of IoT applications, Its core processor XR808 integrates the ARM Cortex‐M4F 32‐bit microcontroller in a smaller package, supporting the master clock frequency up to 160MHz; Integrates high‐performance WLAN system with Wi‐Fi MAC/BB/RF/PA/LNA units; Integrates advanced power management units fo r ultr a‐low power consumption with multiple sleep modes and fast wake‐up mechanisms; Integrates hardware encryption engine to supports AES/DES/3DES/SHA‐1/ MD5/ CRC/ SHA256/TRNG ; Integrates large memory and rich peripherals. XR‐21A WiFi module supports standard IEEE802.11 b/g/n protocol, supports RTOS, with a complete TCP/IP protocol stack, Users can use the module to add networking capabilities to existing devices, or can use it as a master design wireless network product, XR808 can be started directly fr om external flash memory, the on‐chip high‐speed buffer memory helps improve system performance and reduce RAM requirements. XR‐21A W IFI modu le  Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved Page 3 of 14 1.1 Appearance Dimensions XR‐21A W IFI modu le  Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved Page 4 of 14 1.2 Features IEEE802.11b/g/n,1x1SISO2.4GHz Built-in ARM Cortex-M4F 32bit MCU with main frequency from 32KHz to 160MHz,supportRTOS Built-in256KBSRAMand160KBROM SupportexternalFlashandeXecuteInPlace(XIP)  8shareduniversalDMAchannels Built-in6ways12bitSARtypeA/Dconverter Built-inWi-FiMAC/BB/RF/PA/LNA SupportWEP,WPA/WPA2,WPS2.0 SupportUART/GPIO/ADC/PWM/I2C/SPIinterface  UseSMD-16assemblemodel Supportmultiplesleepmodesandcurrentaslowas4uAindeepsleep mode SupportAES/DES/3DES/SHA/MD5/CRCencryptionengine SupportSTA/AP/STA+APoperationmodes SupportSmartConfig/AirKiss(WeChat) SupportLocalfirmwareupgradeusingUARTandremoteupgrade（FOTA ）   HasuniversalandfriendlyATcommandset Supportsecondarydevelopment,supportWindows,Linuxdevelopment environment XR‐21A W IFI modu le  Copyright©2019  ShenzhenJiXinInteligenceCo.,LtdAllRightsReserved Page 5 of 14 1.3 Key parameter Table1.1Descriptionofthemainparameters Module model XR-21A Mounting SMD16 Size(mm) 24*16*3(±0.2) Cert. FCC、CE、IC、REACH、…

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Shenzhen Jixin intelligence Co., Ltd {June 19, 2020} Single Modular Approval Request Letter Date: 2020-06-19 FCC ID: 2AVTT-XR21A Type of Equipment: DTS The following requirements according to FCC Part 15.212 are met: 1. “The modular transmitter must have its own RF shielding.”: Answer: The module has its own RF shield 2. “The modular transmitter must have buffered modulation/data inputs.”: Answer: has been integrated in the chipset 3. “The modular transmitter must have its own power supply regulation.”: Answer: is integrated 4. “The modular transmitter must comply with the antenna requirements of section 15.203 and 15.204(C).”: Answer: The module comes with One permanently attached antennas. The spurious emission requirements are fulfilled (see attached test report). 5. “The modular transmitter must be tested in a stand-alone configuration”: Shenzhen Jixin intelligence Co., Ltd Answer: The module has been tested in a standalone configuration, see report for details} 6. “The modular transmitter must be labeled with its own FCC ID number.”: Answer: The module has its own FCC ID number. See the label for details. 7. “The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements.”: Answer:The module meets any specific rules or operational requirements applicable to the transmitter} 8. “The modular transmitter must comply with any applicable RF exposure requirements.”: Answer:The module complies with any applicable RF exposure requirements, as detailed in the instructions.} Please contact me if you have any further questions. Regards, Signature: Name: Huabin Fu Title: CEO Company: Shenzhen Jixin intelligence Co., Ltd

- Page 1 of 2 - Report No.: MTi19111507-6E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China APPENDIX 1: EUT PHOTO Photo 1 (For model XR-21A) Photo 2

SIZE:10mm*3mm FCC ID :2AVTT-XR21A

- Page 2 of 2 - Report No.: MTi19111507-6E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China Photo 3 ----END OF REPORT---- WiFi Antenna

version01 Shenzhen Jixin intelligence Co., Ltd Declaration concerning Antenna Specification It is hereby declared that the product Model No.: XR-21A FCC ID: 2AVTT-XR21A fulfills the requirement in FCC test relating to the antenna type. The device specified above confirms to the FCC recommendations for Internal Antenna antenna type(s) described below: Model No. of antenna: N/A Type of antenna: PCB Antenna Gain of the antenna: 2 dBi Frequency range: 802.11b/g/n20:2412~2462 MHz The mounting of the antenna is fixed to the radio module and no other antenna should be used. Company name: Shenzhen Jixin intelligence Co., Ltd Address: A505 Room, Business Building, Suojia Science Park, Xixiang, Baoan District, Shenzhen, China City: Shenzhen ZIP / Postal code: N/A Country: China Contact: Huabin Fu Date: 19/05/2020 Signature:

This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen Microtest Co., Ltd. Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China MPE REPORT FCC ID: 2AVTT-XR21A Date of issue: Feb. 27, 2020 Report number: MTi19111507-6E2 Sample description: 2.4G WIFI module Model(s): XR-21A Applicant: Shenzhen Jixin intelligence Co., Ltd Address: A505 Room, Business Building, Suojia Science Park, Xixiang, Baoan District, Shenzhen Date of test: Jan. 14, 2020 to Mar. 18, 2020 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 4 - Report No.: MTi19111507-6E2 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China TEST RESULT CERTIFICATION Applicant’s name: Shenzhen Jixin intelligence Co., Ltd Address: A505 Room, Business Building, Suojia Science Park, Xixiang, Baoan District, Shenzhen Manufacture's name: Shenzhen Jixin intelligence Co., Ltd Address: A505 Room, Business Building, Suojia Science Park, Xixiang, Baoan District, Shenzhen Product name: 2.4G WIFI module Trademark: N/A Model and/or type reference . : XR-21A Serial model ........................... : N/A RF exposure procedures ....... : KDB 447498 D01 v06 This device described above has been tested by Shenzhen Microtest Co., Ltd and the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. Tested by: Danny Xu Mar. 18, 2020 Reviewed by: Leo Su Mar. 18, 2020 Approved by: Tom Xue Mar. 18, 2020 - Page 3 of 4 - Report No.: MTi19111507-6E2 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) MPE Calculation Method Friis transmission formula: Pd= (Pout*G)\ (4*pi*R 2 ) Where Pd= Power density in mW/cm2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1415926 R= distance between observation point and center of the radiator in cm(20cm) Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. - Page 4 of 4 - Report No.: MTi19111507-6E2 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China Measurement Result WIFI: Operation Frequency: WIFI 802.11b/g/n HT20: 2412-2462MHz, Power density limited: 1mW/ cm 2 Antenna Type: PCB Antenna; Antenna gain: 2dBi R=20cm mW=10^(dBm/10) antenna gain Numeric=10^(dBi/10)= 10^(2/10)=1.58 Channel Freq. (MHz) modulation conducted power Tune- up power Max Antenna Evaluation result at 20cm Power density Limits (dBm) (dBm) tune-up power Gain Power density(mW/cm2 ) (mW/cm2) (dBm) (mW) Numeric 2412 802.11b 16.77 16±1 17 50.1187 1.58 0.01575 1 2437 16.67 16±1 17 50.1187 1.58 0.01575 1 2462 16.63 16±1 17 50.1187 1.58 0.01575 1 2412 802.11g 14.94 15±1 16 39.8107 1.58 0.01251 1 2437 14.63 15±1 16 39.8107 1.58 0.01251 1 2462 14.46 15±1 16 39.8107 1.58 0.01251 1 2412 802.11n H20 15.02 15±1 16 39.8107 1.58 0.01251 1 2437 14.58 15±1 16 39.8107 1.58 0.01251 1 2462 15.41 15±1 16 39.8107 1.58 0.01251 1 Conclusion: For the max result: 0.01575≤ 1.0 for 1g SAR, No SAR is required. ----END OF REPORT----

This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen Microtest Co., Ltd. Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China Test Report FCC ID:2AVTT-XR21A Date of issue: June 15, 2020 Report number: MTi19111507-6E1 Sample description: 2.4G WIFI module Model(s): XR-21A Applicant: Shenzhen Jixin intelligence Co., Ltd Address: A505 Room, Business Building, Suojia Science Park, Xixiang, Baoan District, Shenzhen Date of test: Jan. 14, 2020 to June 15, 2020 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 52 - Report No.: MTi19111507-6E1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China Table of Contents 1 GENERAL INFORMATION ...................................................................................................................................... 5 1.1 DESCRIPTION OF EUT ................................................................................................................................................... 5 1.2 OPERATION CHANNEL LIST .............................................................................................................................................. 6 1.3 TEST CHANNEL LIST ....................................................................................................................................................... 6 1.4 ANCILLARY EQUIPMENT LIST ........................................................................................................................................... 6 1.5 DESCRIPTION OF SUPPORT UNITS .................................................................................................................................... 6 2 SUMMARY OF TEST RESULTS ................................................................................................................................. 7 3 TEST FACILITIES AND ACCREDITATIONS .................................................................................................................. 8 3.1 TEST LABORATORY ........................................................................................................................................................ 8 3.2 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 8 3.3 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 8 3.4 TEST SOFTWARE ........................................................................................................................................................... 8 4 EQUIPMENT LIST .................................................................................................................................................. 9 5 TEST RESULT ....................................................................................................................................................... 10 5.1 ANTENNA REQUIREMENT ............................................................................................................................................. 10 5.1.1 Standard requirement ....................................................................................................................................... 10 5.1.2 EUT antenna ..................................................................................................................................................... 10 5.2 PEAK OUTPUT POWER ................................................................................................................................................. 11 5.2.1 Limit .................................................................................................................................................................. 11 5.2.2 Test setup .......................................................................................................................................................... 11 5.2.3 Test procedure ................................................................................................................................................... 11 5.2.4 Test results ........................................................................................................................................................ 12 5.3 POWER SPECTRAL DENSITY ........................................................................................................................................... 13 5.3.1 Limit .................................................................................................................................................................. 13 5.3.2 Test setup .......................................................................................................................................................... 13 5.3.3 Test procedure ................................................................................................................................................... 13 5.3.4 Test results ........................................................................................................................................................ 14 5.4 CONDUCTED EMISSION ................................................................................................................................................ 17 5.4.1 Limits ................................................................................................................................................................. 17 5.4…

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- Page 50 of 52 - Report No.: MTi19111507-6E1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China Photographs of the Test Setup Conducted emission Radiated emission - Page 51 of 52 - Report No.: MTi19111507-6E1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: No.102A & 302A, East Block, Hengfang Industrial Park, Xingye Road, Xixiang, Bao'an District, Shenzhen, Guangdong, China