Package Included 1 x DHT11 temperature and humidity sensor module 1 x HC-SR501 human infrared sensor module 1 x DS1302 real-time clock module(3V CR2032 battery not included) 1 x Rain sensor module 1 x Sound sensor module 1 x HC-SR04 ultrasonic sensor module 1 x Flame sensor module fire source detection 1 x KY-008 laser sensor module 1 x Photoresistor sensor module photoelectric sensor 1 x YL-69 soil moisture sensor module 1 x Obstacle avoidance sensor module Black and White Line Identification 1 x Vibration sensor module 1 x MQ-2 gas sensor module 1 x 315M wireless transceiver module 1 x Tilt sensor module 1 x One channel TCRT5000 tracing module Specifications 1.KY-008 laser sensor module Operating voltage: 5V Specifications: 15 * 24 mm Light source wavelength: 650 nm 2.Obstacle avoidance sensor module VCC: 3.3V-5V external voltage (can be directly connected to the 5v and 3.3v microcontroller MCU) GND: External GND OUT: Small board digital output interface (0 and 1) Connection method: VCC-VCC; GND-GND; OUT-IO Board size: 3.2 x 1.4cm 3.Flame sensor module Operating voltage: 3.3V-5V Output form: DO digital switching output (0 and 1) and AO analog voltage output Size: 3.2cm x 1.4cm Detect flame or wavelength range (approx): 760 nm to 1100 nm, lighter flame test distance is 80cm, the greater flame, the farther test distance Detection angle is about 60 degree, particularly sensitive to flame photometry Adjustable sensitivity 4.315M wireless transceiver module Operating voltage: DC5V Quiescent current: 4mA Receiving frequency: 315MHz Receiving sensitivity: -105DB Size: 30 x 14 x 7mm 5.Emission head parameters Transmission distance: 20-200 meter (different voltage, different effect) Operating voltage: 3.5-12V Dimension: 19 x 19mm Work: AM Transfer rate: 4KB / S Transmitting power: 10mW Transmission frequency: 315M Pinout left → right: (DATA, VCC, GND) 6.One channel TCRT5000 tracing module Detection distance: about 10mm Operating voltage: 5V, black line output low level, white line output high level 7.Vibration sensor module Operating voltage: 3.3V-5V Output type: Digital switching output (0 and 1) Small PCB board size: 3.2cm x 1.4cm 8.MQ-2 gas sensor module Dimension: 32 x 22 x 27mm The main chip: LM393, ZYMQ-2 gas sensor Operating voltage: 5V DC Dual signal output (analog output, and TTL level output) TTL output valid signal is low level. (When the output low level signal light can be directly connected microcontroller) Analog output: 0 ~ 5V voltage, the higher the concentration the higher the voltage. 9.Sound sensor module Operating voltage: 3.3V-5V Small PCB board size: 3.4cm x 1.6cm 10.DHT11 temperature and humidity sensor module VDD: 3.3-5.5V DC DATA: Serial data NC: No connection GND: Grounding, negative power supply 11.HC-SR04 ultrasonic sensor module Operating voltage: 5V Ultra-small quiescent current: less than 2mA Induction angle: not more than 15 degrees Detection distance: 2cm-400cm High precision: up to 0.3cm