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SmartElex BME680 Temperature, Humidity, Pressure and Gas Sensor Breakout Board PCA9685 16 Channel 12 Bit Servo Motor Driver black wire to both external black wire to both external power supply negative and Arduino ground (common ground reference) or classroom and displays readings on an LCD or sends alerts to your phone via Blynk or MQTT Full I2C and SPI examples are included and VOC gas resistance in a single package
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