2BAS6-BIGcontrol mainboard

Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 1 / 20 BIGTREETECH Pi V1.2 User Manual Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 2 / 20 CONTENTS Revision History .............................................................................. 3 Product Profile ................................................................................ 4 Feature Highlights ........................................................................ 4 Specifications ............................................................................ 4 Dimensions .............................................................................. 5 Peripheral Port ................................................................................ 5 Connector Diagram ....................................................................... 5 Connection Description ........................................................................ 6 Power Supply ............................................................................. 6 40 pins GPIO ............................................................................. 7 ADXL345 Wiring .......................................................................... 7 SPI Display Wiring ........................................................................ 8 Connecting a USB To CAN Module ......................................................... 9 Fan Wiring ............................................................................... 9 HDMI Display Wiring ..................................................................... 10 OS Writing ................................................................................... 11 Download OS Image...................................................................... 11 Download and Install Writing Software ..................................................... 11 Start to Write OS ......................................................................... 11 Using Raspberry Pi Imager ........................................................... 11 Using balenaEtcher .................................................................. 13 Network Configuration ........................................................................ 15 Wired Network ........................................................................... 15 WiFi Setting ............................................................................. 15 Configure the Motherboard ................................................................... 16 SSH Connect to Device ................................................................... 16 Compile MCU Firmware .................................................................. 17 Cautions ..................................................................................... 19 Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 3 / 20 Revision History Version Revisions Date 01.00 Original 2022/12/29 Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 4 / 20 Product Profile BIGTREETECH Pi v1.2 has the same size and the same mounting hole location as Raspberry Pi, with 2.4GHz WiFi built in. Feature Highlights 1. CPU: ALLWINNER H616, Quad-core Cortex-A53 @1.5GHz 2. GPU: Mali G31 MP2, Support OpenGL3.2 3. RAM: 1GB DDR3L SDRAM 4. Display: HDMI2.0A Port, 4K Supported 5. 4 x USB 2.0 Ports 6. Fast Ethernet + 100Mbps WiFi 7. Audio: 3.5mm Jack 8. 40-pin GPIO 9. Display: SPI Port 10. ADXL345 Port 11. Onboard connecting port for USB To CAN Module. 12. Built-in IR Receiver 13. The mounting holes are in the same location as Raspberry Pi. Specifications 1. Product Dimensions: 85 x 56 mm 2. Mounting Size: 64 x 49.4 mm 3. Type-C Input Voltage: DC 5V±5%/2A 4. Input Voltage of Power IN Terminal: DC 12V-24V 5. Pi v1.2 Output Voltage: 3.3V±2%/100mA 6. Pi v1.2 WiFi: 2.4G/802.11 b/g/n Wireless LAN Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 5 / 20 Dimensions Peripheral Port Connector Diagram Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 6 / 20 Connection Description Power Supply USB Power Supply: The SOC's UART converts USB signals through WCH340E. Connect this port to the PC to monitor Pi startup via the serial port tool, and identify faulty parts if there are any. DC12-24V: Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 7 / 20 40 pins GPIO ADXL345 Wiring Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 8 / 20 SPI Display Wiring Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 9 / 20 Connecting a USB To CAN Module Note: when using the U2C module, the SOC's USB2 is used for communication. Fan Wiring Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 10 / 20 HDMI Display Wiring Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 11 / 20 OS Writing Download OS Image Please download and install the OS image we provided: https://github.com/bigtreetech/CB1/releases Download and Install Writing Software Install the official Raspberry Pi Imager: https://www.raspberrypi.com/software/ balenaEtcher: https://www.balena.io/etcher/ Choose one of the above software to download and install. Start to Write OS Using Raspberry Pi Imager 1. Insert a microSD card into your computer via a card reader. 2. Choose OS. Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 12 / 20 3. Select "Use custom", then select the image that you downloaded. 4. Select the microSD card and click "WRITE" (WRITE the image will format the microSD card. Be careful not to select the wrong storage device, otherwise the data will be formatted). Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 13 / 20 5. Wait for the writing to finish. Using balenaEtcher 1. Insert a microSD card into your computer via a card reader. 2. Select the image that you downloaded. Shenzhen BIQU Innovation Technology Co., Ltd. BIGTREETECH 14 / 20 3. Select the microSD card and click "WRITE" (WRITE the image will format the microSD card. Be careful not to select the wrong storage device, otherwise the data will …

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Shenzhen BIQU Innovation Technology Co., Ltd. 2023.04.10 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BAS6-BIG Shenzhen BIQU Innovation Technology Co., Ltd. certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Applicant signature: Applicant printed name: Eric Zhang / General Manager Shenzhen BIQU Innovation Technology Co., Ltd. 2023.04.10 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BAS6-BIG Shenzhen BIQU Innovation Technology Co., Ltd. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, Applicant signature: Applicant printed name: Eric Zhang / General Manager

Shenzhen BIQU Innovation Technology Co., Ltd. U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Baihetian Innovative Solutions FRN: 0033401605 Contact Name: Kenneth Young Street Address: 6837 Chase Rd City/Province/Zip: Dearborn, MI 48126 Telephone No: 313-395-3113 Email: [email protected] This letter is to confirm that we (“the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: Signed by (Printed Name/Title): The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen BIQU Innovation Technology Co., Ltd. Grantee Code: 2BAS6 FCC ID: 2BAS6-BIG Contact Name: Eric Zhang Street Address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Telephone No: 86-137989800510 Email: [email protected] Applicant Signature: Date: 2023.04.10 Signed by (Printed Name/Title): Eric Zhang / General Manager

Shenzhen BIQU Innovation Technology Co., Ltd. 2023.04.10 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: control mainboard MODEL : BIGTREETECH Pi V1.2, BIGTREETECH Pi2, BIGTREETECH Pi3, BIGTREETECH Pi Zero, BIGTREETECH CB1, BIGTREETECH CB1 EMMC, BIGTREETECH CB2, BIGTREETECH PAD7, BIGTREETECH PAD7 Lite, BIGTREETECH PAD5, BIGTREETECH PAD5 Lite FCC ID: 2BAS6-BIG To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Eric Zhang / General Manager Contact information / address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China

Shenzhen BIQU Innovation Technology Co., Ltd. 2023.04.10 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Eric Zhang / General Manager Contact information / address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China

Shenzhen BIQU Innovation Technology Co., Ltd. Model Difference 2023-04-10 EUT NAME: control mainboard MODEL : BIGTREETECH Pi V1.2, BIGTREETECH Pi2, BIGTREETECH Pi3, BIGTREETECH Pi Zero, BIGTREETECH CB1, BIGTREETECH CB1 EMMC, BIGTREETECH CB2, BIGTREETECH PAD7, BIGTREETECH PAD7 Lite, BIGTREETECH PAD5, BIGTREETECH PAD5 Lite FCC ID: 2BAS6-BIG All the model are the same circuit and RF module, except model names. Regards Sincerely Client’s signature: Client’s name / title : Eric Zhang / General Manager Contact information / address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China

External Photos Antenna

10*5mm Label Location FCC ID: 2BAS6-BIG

Internal Photos

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2BAS6-BIG Applied procedures / limit According to FCC §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz * = Plane-wave equivalent power density MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna, R=0.2m TEST RESULTS Conclusion: For the max Power Density(S)(mW/ cm2) : 0.00468＜1, the SAR testing is not required. Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW/ cm2) Result 802.11b 12±1 13 19.95 1.18 (0.71dBi) 0.00468 1 Pass

Page-1- 深圳市东信通电子科技有限公司 ShenZhenEastongElectronictechnologyCo.,LTD APPROVALSHEET FOR Model:PiV1.2 （WIFIbandinternalantenna） IssuedbyCheckedby ConfirmedbyDate2022-06-07 ManufacturerShenZhenEastongElectronictechnologyCo.,LTD Address 409-411,ShanhaiE-commercePort,No.9 HuanchengRoad,YangmeiCommunity,Bantian Street,LonggangDistrict,Shenzhen Page-2- 1Summary Thisreportsummarizestheelectricalresultsoftheproposedantennatosupportthe M4Pprogram.Wetesttheantennawiththelatestversionhandset. 2GeneralDescription 2.1Definitions VSWR:VoltageStandingWaveRate 3MechanicalDescription 4ElectricalPerformance 4.1Set-up 4.1.1VSWRandreturnloss VSWRmeasurements(S 11 )wereperformedusinganAgilentE5070BNetwork Analyzerandthepreviouslydescribedtestfixture.Coaxialchokeswereusedto mitigatesurfacecurrentsontheoutsideofthecabling.Thetestingwasperformedin freespace. 4.1.2Efficiency,GainandTRP/TIS ThegainoftheantennawasmeasuredinDongXin’s3Danechoicchamberin Shenzhen.Thechamberiscapableofdoingtestsfrom380MHzto6GHz.Coaxial chokesonthefeedcablewereusedtomitigatesurfacecurrents.Themeasurement resultsarecalibratedusingdipolestandards.ForTRPandTISthechamberusesa Agilent8960toestablishtheconnectionwiththemobiledevice.DuringTRPteststhe 8960readsthepowerreceivedthroughthechamberprobeswhilstduringTISteststhe 8960transmitsthroughtheprobe.Alldataisafterwardscorrectedbyacalibration table. 4.1.3MatchingCircuitDescription Nomatching. 4.2MeasurementData EffectiveRadiatedPowerSummation Page-3- 5AntennaSize Unit:mm Page-4- 6S11testdata ： Page-5- 7Antennapassivetestdata 8Antenna3Dfigure 2400MHz T0-P0 T45-P0 T90-P0 T180-P0 Page-6- 2450MHz T0-P0 T45-P0 T90-P0 T180-P0 Page-7- 2500MHz T0-P0 T45-P0 T90-P0 T180-P0

No.：BCTC/RF-EMC-005 Page: 1 of 79 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2303474742E Applicant: Shenzhen BIQU Innovation Technology Co., Ltd. Product Name: control mainboard Model/Type reference: BIGTREETECH Pi V1.2 Tested Date: 2023-03-21 to 2023-04-06 Issued Date: 2023-04-07 Report No.: BCTC2303474742E No.：BCTC/RF-EMC-005 Page: 2 of 79 Edition：A.5 FCC ID: 2BAS6-BIG The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: control mainboard Trademark: BIGTREETECH Model/Type reference: BIGTREETECH Pi V1.2 BIGTREETECH Pi2, BIGTREETECH Pi3, BIGTREETECH Pi Zero, BIGTREETECH CB1, BIGTREETECH CB1 EMMC, BIGTREETECH CB2, BIGTREETECH PAD7, BIGTREETECH PAD7 Lite, BIGTREETECH PAD5, BIGTREETECH PAD5 Lite Prepared For: Shenzhen BIQU Innovation Technology Co., Ltd. Address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Manufacturer: Shenzhen BIQU Innovation Technology Co., Ltd. Address: 2004-2005, Building 4, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2023-03-20 Sample tested Date: 2023-03-21 to 2023-04-06 Issue Date: 2023-04-07 Report No.: BCTC2303474742E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is WIFI-2.4GHz band radio test report. Tested by: Approved by: Eric Yang/Project Handler Zero Zhou/Reviewer Report No.: BCTC2303474742E No.：BCTC/RF-EMC-005 Page: 3 of 79 Edition：A.5 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 11 5. Test Facility And Test Instrument Used ............................................................... 12 5.1 Test Facility ......................................................................................................... 12 5.2 Test Instrument Used .......................................................................................... 12 6. Conducted Emissions .......................................................................................... 14 6.1 Block Diagram Of Test Setup .............................................................................. 14 6.2 Limit .................................................................................................................... 14 6.3 Test procedure .................................................................................................... 14 6.4 EUT operating Conditions ................................................................................... 14 6.5 Test Result .......................................................................................................... 15 7. Radiated Emissions ............................................................................................. 17 7.1 Block Diagram Of Test Setup .............................................................................. 17 7.2 Limit .................................................................................................................... 18 7.3 Test procedure .................................................................................................... 19 7.4 EUT Operating Conditions .................................................................................. 20 7.5 Test Result .......................................................................................................... 21 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 25 8.1 Block Diagram Of Test Setup .............................................................................. 25 8.2 Limit .................................................................................................................... 25 8.3 Test procedure .................................................................................................... 26 8.4 EUT Operating Conditions .................................................................................. 26 8.5 Test Result .......................................................................................................... 27 9. Power Spectral Density Test ............................................................................... 29 9.1 Block Diagram Of Test Setup .............................................................................. 29 9.2 Limit .............…

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Conducted emissions Radiated Measurement Photos