2ATM77904Water Leak Sensor 2

Water Leak Sensor 2 YS7904-UC Installaon & User Guide Rev 1.0 Contents In the Box ·············································································1 Introducon ·········································································2 Set Up ··················································································5 Installaon ···········································································7 Using the YoLink App ···························································14 ················About YoLink Control ··········································23 ·27Maintenance ···················· ················································ Specificaons ·············································30························ Troubleshoong ·································································31 Warning ·············································································32 Customer Service & Warranty ··············································34 In the Box 1 A. Water Leak Sensor B. Sensor Cable C. Mounng Hook D. Quick Start Guide C. A. D. B. Introducon The YoLink Water Leak Sensor 2 is a smart water detector, that can detect the presence or absence of water, and can either 2 In water leak detecon mode, provide early warning of water leaks or flooding before costly property damage occurs In water level detecon mode, provide noficaon of no water, for supervision of water supplies for pets, house plants, greenhouses, horculture/agriculture, and so on Depending on your applicaon for the sensor, a choice of cable is required. The sensor cable (included) can be used for both detecon modes, but it is ideal for water leak detecon mode. The water sensor probe (sold separately) is ideal for water level detecon mode Cable Types: (see illustraons, next page) The sensor cable detects water along the length of the cable, while the water sensor probe detects water only at the probe at the end of the cable Depending on the water leak or level detecon mode, the sensor LED will blink red and the sensor sounder will emit loud alarm tones. Noficaons will be sent to you via the YoLink app (available noficaons types are: email, text/SMS and push/banner noficaons on your Apple or Android smartphone, each configurable in app sengs) Operaon & Noficaons: 3 Phono Jack Used for extending sensor cable Status LED * Not visible while there is no operaon with the SET buon or while device is in normal monitoring status Sensor Cable Used for water detecon SET Buon Phono Plug Detector Probe Used for water detecon or low water level warning Phono Plug Mounng Hole OR You can Replace the Sensor Cable with a Water Sensor Probe Instead (Oponal, Sold Separately) Alarm Tones One Beep Device power-up / buon pressed Two Beeps Warning (Two beeps every 2 seconds for the first minute. Two beeps every 5 seconds for the next 12 hours. Sustaining two beeps once a minute aer 12 hours) Phono Jack Used for sensor cable extension Wall-Mounng Slot Baery Compartment Includes two AAA non-rechargeable baeries The LED light indicates the current status of the sensor: 4 Blinking Green Connecng to Cloud Fast Blinking Green Establishing Connecon with YoLink System (YoLink Control) Slow Blinking Green Updang Fast Blinking Red Removing Connecon to YoLink System (YoLink Control) Blinking Red Once Leak or Flooding Warning (water leak detecon mode) Water Exhausted Warning (water level detecon mode) Blinking Red And Green Alternately to Factory DefaultRestoring Set Up Set Up - First-Time YoLink Users (Exisng users proceed to Add Device, next page) * Get ready: your WLeakTo set up and use ater Sensor 2, you will need an Apple iPhone or tablet that is iOS 9.0 or higher, or an Android phone or tablet that is Android 4.4 or higher Follow the steps below to set up your Water Leak Sensor 2 via the YoLink app Download YoLink app through Apple App Store or Google Play Store Log in or create a new account if required Download, and log in to YoLink app 1 * Make sure your hub is connected to the internet (green LED indicator is blinking, blue LED indicator is always on) Set up YoLink Hub 2 YoLink Hub is required to set up your Water Leak Sensor 2. Please set up your YoLink Hub first (refer to YoLink Hub manual) * Ethernet patch cable (included) to your network (router, switch, etc.), recommended, but oponal. Otherwise connect your Hub to your home Wi-Fi network. Refer to the Hub set up manual for more informaon: YS1603-UC_User Guide 5 Power Adapter Hub S E T Add Device Press the SET buon (on front of sensor) once, the Status LED will blink several mes (red, then green). The green LED indicates the device is online and ready to use Tap “ ” buon, then scan QR Code on the device Press the SET buon (on front of sensor) once 2 SET Buon * Status LED will blink red once, then green several mes(If device is working well with connecon to the cloud, it will blink red once only) Tap “ ” buon to add devices 1 6 Installaon The mounng hook is very difficult to relocate aer being affixed to the mounng surface. Test your locaon before affixing the mounng hook to the surface. Use masking or painters sensor tape to secure themounng hook to the surface. Once you have the mounng hook temporarily mounted then hang the sensor on the hook, test out the sensor. With the app in hand, follow the Device Alerts secon on page to test water warning and warning removed using the app and 17 observing the status of the sensor as shown on the app (Water Warning or Water Warning Removed). Oponally, you may set up your automaon (e.g. turn off a valve when water is detected) to funconally test the alert of the sensor - proceed to the following steps for informaon on creang automaons, then return to this step Test the Sensor Locaon Before Installaon This sensor is not waterproof and is designed and intended only for indoor use. Subjecng this device to outdoor environment condions …

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Rev11/20/07 (YoSmartInc.) FederalCommunicationsCommission AuthorizationandEvaluationDivision ConfidentialityRequestregardingapplicationforcertificationofFCCID: 2ATM77904 PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestconfidential treatmentofinformationaccompanyingthisapplicationasoutlinedbelow: ExhibitTypeFileName BlockDiagram, Schematics, OperationalDescription BlockDiagram Schematics OperationalDescription Theabovematerialscontaintradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthesematerialsmaybeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors. TheapplicantunderstandsthatpursuanttoSection0.457oftheRules,disclosureofthis applicationandallaccompanyingdocumentationwillnotbemadebeforethedateoftheGrant forthisapplication. Sincerely, (ManxiangXu)

YoSmartInc. ModelDifference Productdescription:WaterLeakSensor2 Modelname:YS7904-UC,YS7904-UA TradeName:N/A FCCID:2ATM77904 AllthemodelarethesamecircuitandRFmodule,exceptmodelnames. Regards Sincerely Client’ssignature: Client’sname/title:ManxiangXu/N/A Contactinformation/address:17165VonKarmanAvenue,Suite105,IrvineCA,92614,USA

(YoSmartInc.) FederalCommunicationsCommission AuthorizationandEvaluationDivision 1435OaklandMillsRoad Columbia,MD21046 Date:2021/01/21 SUBJECT:FCCApplicationforFCCID:2ATM77904 ToWhomItMayConcern: We,theundersigned,herebyauthorizeAlanMeiatShenzhenBCTCTestingCo.,Ltd.on ourbehalf,toapplytotheFederalCommunicationsCommissiononourequipment.Any andallactscarriedoutbyAlanMeiofShenzhenBCTCTestingCo.,Ltd.onourbehalf shallhavethesameeffectasactsofourown. ThisistoadvisethatweareinfullcompliancewiththeAnti-DrugAbuseAct.We,the applicant,arenotsubjecttoadenialoffederalbenefitspursuanttoSection5301ofthe Anti-DrugActof1988,21USC853a,andnopartytotheapplicationissubjecttoadenial offederalbenefitspursuanttothatsection. Regards, (ManxiangXu)

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Internal Photos Antenna

No.：BCTC/RF-EMC-005 Page 1 of 32 Edition：A.3 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2012774169E Applicant: YoSmart Inc. Product Name: Water Leak Sensor 2 Model/Type Ref.: YS7904-UC Tested Date: 2020-12-15 to 2021-01-08 Issued Date: 2021-01-08 Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 2 of 32 Edition：A.3 FCC ID:2ATM77904 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: Water Leak Sensor 2 Trademark: N/A Model/Type Ref.: YS7904-UC YS7904-UA Prepared For: YoSmart Inc. Address: 17165 Von Karman Avenue, Suite 105, Irvine CA, 92614, USA Manufacturer: YoSmart Inc. Address: 17165 Von Karman Avenue, Suite 105, Irvine CA, 92614, USA Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2020-12-15 Sample tested Date: 2020-12-15 to 2021-01-08 Issue Date: 2021-01-08 Report No.: BCTC2012774169E Test Standards FCC Part15.249 ANSI C63.10-2013 Test Results PASS Tested by: Approved by: Kelsey Tan/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 3 of 32 Edition：A.3 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 ........................................... 8 4.3 Support Equipment ................................................ 9 4.4 Channel List ...................................................... 9 4.5 Test Mode ........................................................ 9 5. TEST FACILITY AND TEST INSTRUMENT USED .................... 10 5.1 Test Facility ...................................................... 10 5.2 Test Instrument Used ............................................. 11 5. CONDUCTED EMISSIONS .......................................... 12 5.1 Block Diagram Of Test Setup ....................................... 12 5.2 Limit ............................................................ 12 5.3 Test procedure ................................................... 12 5.4 EUT operating Conditions .......................................... 13 5.5 Test Result ...................................................... 13 6. RADIATED EMISSIONS ............................................ 14 6.1 Block Diagram Of Test Setup ....................................... 14 6.2 Limit ............................................................ 15 6.3 Test procedure ................................................... 16 6.4 EUT operating Conditions .......................................... 18 6.5 Test Result ...................................................... 19 6.6 Field Strength Calculation .......................................... 23 7. 100 KHZ BANDWIDTH OF FREQUENCY BAND EDGE ................. 24 7.1 Block Diagram Of Test Setup ....................................... 24 7.2 Applicable Standard ............................................... 24 7.3 Test procedure ................................................... 24 7.4 EUT operating Conditions .......................................... 25 7.5 Test Result ...................................................... 25 8. 20 DB BANDWIDTH ................................................ 27 8.1 Block Diagram Of Test Setup ....................................... 27 8.2 Limit ............................................................ 27 8.3 Test procedure ................................................... 27 8.4 EUT OPERATION CONDITIONS ................................... 27 8.5 Test Result ...................................................... 28 9. ANTENNA REQUIREMENT ......................................... 29 9.1 Limit ............................................................ 29 Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 4 of 32 Edition：A.3 9.2 Test Result ...................................................... 29 10. EUT PHOTOGRAPHS ............................................. 30 11. EUT TEST SETUP PHOTOGRAPHS ................................ 31 (Note: N/A means not applicable) Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 5 of 32 Edition：A.3 1. VERSION Report No. Issue Date Description Approved BCTC2012774169E 2021-01-08 Original Valid Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 6 of 32 Edition：A.3 2. TEST SUMMARY The Product has been tested according to the following specifications: No. Test Parameter Clause No Results 1 Conducted Emission 15.207 N/A 2 20dB Bandwidth 15.215 PASS 3 Fundamental &Radiated Spurious Emission Measurement 15.249 PASS 4 Band Edge Emission 15.205 PASS 5 Antenna Requirement 15.203 PASS Report No.: BCTC2012774169E No.：BCTC/RF-EMC-005 Page 7 of 32 Edition：A.3 3. MEASUREMENT UNCERTAINTY Where relevant, the following measurement uncertainty levels have been estimated for tests performed on the Product as specified in CISPR 16-4-2. This uncertainty represents an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=2. No. Item Uncertainty 1 3m camber Radiated spurious emission(30MHz-1GHz) U=4.3dB 2 3m chamber Radiated spurious emission(1GHz-18GHz) U=4.5dB 3 3m chamber Radiated spurious emission(18GHz-40GHz) U=3.34dB 4 Conducted Adjacent channel power U=1.38dB 5 Conducted output power uncertainty Above 1G U=1.576dB 6 Conducted output power uncertainty below 1G U=1.28dB 7 humidi…

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ReportNo.:BCTC2012774169E No.：BCTC/RF-EMC-005Page 31 of 32 Edition：A.3 11.EUTTESTSETUPPHOTOGRAPHS RadiatedMeasurementPhotos