joel35 / sine-wave-producer

Creates a sine wave array and publishes to MQTT in a constant loop

Sine Wave Producer

Data

Description

• ts: UNIX timestamp of when data was produced
• x: Float array for graph x-axis
• y: Float array for graph y-axis

Format

{
  "ts": <float>,
  "x": <array>,
  "y": <array>
}

Example with X_LEN of 10

{
  "ts": 1678365923.8776073, 
  "x": [0.0, 0.6981317007977318, 1.3962634015954636, 2.0943951023931953, 2.792526803190927, 3.490658503988659, 4.1887902047863905, 4.886921905584122, 5.585053606381854, 6.283185307179586], 
  "y": [0.8545989080882804, 0.3208684319195699, -0.3629999495997086, -0.8770166204062203, -0.9806674675706343, -0.6254531077538699, 0.022417712317940538, 0.659799035651065, 0.9884530573535778, 0.8545989080882807]
}

Available environment variables

Logging

• LOGLEVEL - Sets logging level (default: INFO)

MQTT client settings

• MQTT_HOST - MQTT broker address (default: localhost)
• MQTT_PORT - MQTT broker port (default: 1883)
• MQTT_TIMEOUT - MQTT client keepalive duration (default: 60)
• ROOT_MQTT_TOPIC - Root MQTT publish topic (default: testing)
• DATA_MQTT_TOPIC - MQTT topic for sine wave data (default: sine_wave)

Application settings

• FPS - Data generation frequency (frames per second) (default: 1)
• X_LEN - Length of generated data array (default: 100)