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TRIG → any digital output pin
NFC requires a minimum of two devices: one for broadcasting and the second for receiving the signal
Flame sensor module (Analog + Digital): Flame sensor module (Analog + Digital)
This cheap yet efficient RFID card could be the answer to your access controls
digital output Moisture Sensor Grove chemical sensor module general-purpose sensing Soil Moisture Sensor Corrosion Resistant soil moisture sensor general-purpose sensing What you can build
JSN-SR04T 2.0 Waterproof Ultrasonic Distance Sensor gprs TRIG → any digital outputWaterproof Ultrasonic Distance Sensor for Outdoor and Liquid Level Projects The JSN SR04T 2. 0 Waterproof Ultrasonic Ranging Module is the upgrade makers and engineers choose when the standard HC SR04 isn't enough. Its sealed, waterproof transducer probe can be mounted outdoors, near water, or even partially submerged making it the right tool for water tank level monitoring, rain detection, outdoor obstacle avoidance, sump pump automation, fish pond
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