SWITCH, route messages based on their property values, DHT11, to detect temperature or humidity levels, GAUGE, to visualize data in a range, RANGE, to map a numeric value to a different range, SERVO, to work with the servo motor, DISPLAY, to visualize the output in OLED, CHART, to visualize data in a line/bar chart, BUZZER, an actuator to output audio, INJECT, injects a message into a flow either manually or at regular intervals

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