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if (millis() - lastSend > 5000) lastSend = millis(); // Example sensor reading (replace with real sensor) int sensorVal = analogRead(34); char msg[50]; snprintf(msg, 50, "\"sensor\": %d", sensorVal); client.publish(topic, msg); Serial.println(msg);

: Use dynamic Excel or web-based charts that automatically "stretch" or update as new data is inserted. acome iot for pc