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This MicroPython program connects a Raspberry Pi Pico W to a Wi-Fi network and periodically publishes its internal temperature readings to an MQTT topic (pico/w/temperature) on the public HiveMQ broker. It uses the onboard ADC channel to read the internal temperature sensor, converts the analog value into Celsius, and sends it every 5 seconds via MQTT. The script demonstrates Wi-Fi connectivity, sensor data acquisition, and MQTT-based IoT communication — a foundational setup for remote monitoring or IoT data logging projects.
