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The D1 R2 is a mini wifi board based on ESP-8266EX
This is a bluetooth module for use with any microcontroller
I2C communication to all 3 sensors
7427 (Triple 3-input NOR Gate )
Relay Module 8 Channels - 5V) 3v The D1 R2 is aIntroduction : It is a 8 channel relay board, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It is also able to control various appliances and other equipments with large current. used where it is necessary to control a circuit by a low power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal.
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