Patch Antenna for GSM / 3G / 4G Applications TCRT5000 IR Sensor Module You can use hardwired buttons

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Description

Patch Antenna for GSM 3G 4G Applications TCRT5000 IR Sensor Module You can use hardwired buttons You can use hardwired buttons or sensors connected to GPIO inputs to control the relays locally without WiFi 2K Ohm resistors serve as current limiting elements in LED indicator circuits and display backlighting applications Patch Antenna for GSM 3G 4G Applications

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