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HR 202 Humidity Detection Sensor ModuleFeatures-Adjustable Sensitivity, External GND.Detect Ambient Humidity.Provided with Fixed Bolt Hole, Convenient to Install.Power Indicator Light & Digital Output Indication Lamp.Using LM393 Chip for Stable Work.DO Small Digital Outputs Interface (0 & 1)..

MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector ModuleFeatures-Good sensitivity to Combustible gas in a wide rangeHigh sensitivity to LPG, Propane, and HydrogenLong life and low costSimple drive circuitCan be used as a Digital or analog sensor..

Flame Sensor infrared Receiver Ignition source detection moduleFeatures-Indicator light: a green one for the switch, a red one for power.Built-in a potentiometer for sensitivity control.Onboard signal output indication, output effective signal is high, at the same time the indicator light up, the ou..

Ai Thinker NF-03 Wireless Transceiver ModuleFeatures-Built-in 2.4G antenna, compact size, easy to useSupport data reception of six channelsModulation method: GFSK / FSKSupport 2Mbps/1Mbps/250Kbps data rateInternally integrated high PSRR LDOWide power supply voltage range: 1.9~3.6V..

F11 Square Fresnel Lens for SMD PIR Motion Sensor Pack of 51 Easy to install2. High quality3. Factory price4 Detectable distance: 4m5 Viewing angle: 70°..

HTU21D Temperature and Humidity Sensor ModuleFeatures-    The HTU21D Temperature and Humidity Sensor Module is a low-cost, easy-to-use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for weather sta..

Ai Thinker ESP-01F ESP8285 Serial WiFi ModuleFeatures-The smallest 802.11b/g/n Wi-Fi SOC module Low power 32-bit CPU, can also serve as the application processor Up to 160MHz clock speed Built-in 10 bit high precision ADC Supports UART/GPIO/IIC/PWM/ADC SMD-18 package for eas..

Ai Thinker ESP-01M WiFi ModuleFeatures-The smallest 802.11b/g/n Wi-Fi SoC moduleUses low power 32bit CPU and compatible with an application processorMain frequency up to 160MHzBuilt-in 10Bit high precision ADCSupport UART/GPIO/PWM/ADC interface..

Ai Thinker ESP-01S ESP8266 WiFi ModuleFeatures-1MB (8Mbit) Flash size.Very competitive priceAP, STA, AP+STA modes available.Very simple AT commands, easy to use.Internal LWIP interface.Four pins interface, VCC-3V3, GND, TXD, and RXD. Two extra GPIOs can use.AT commands firmware. New I..