Multi-sensor Example

This project demonstrates the use of multiple sensors integrated into a single device using an ESP32-C6 microcontroller. The sensors included in this example are a light sensor (BH1750) and a pressure sensor (BME280).

Prerequisites

• ESP32-C6 development kit
• ESP-IDF environment set up
• Required hardware components: BH1750 light sensor, BME280 pressure sensor

Getting Started

Hardware Setup

• BH1750 Light Sensor: Measures ambient light levels.
• BME280 Pressure Sensor: Measures atmospheric pressure, temperature, and humidity.

Software Setup

1. Clone the repository containing this example.

2. Navigate to the examples/multisensor_ex directory.

3. Update the submodule(s).

   Bash

   git submodule update --init --recursive
   

4. Add sdkconfig.user in the project root and set the values for your device:

   File

   CONFIG_MQTT_USER="sensgreen-mqtt-user"
   CONFIG_MQTT_PASS="sensgreen-mqtt-password"
   CONFIG_MQTT_HOST="sensgreen-broker"
   CONFIG_MQTT_PORT="broker-port"
   CONFIG_MQTT_TOPIC="sensor/data"
   CONFIG_DEVICE_UID="my-unique-device-id"
   CONFIG_EXAMPLE_WIFI_SSID="my-wifi-ssid"
   CONFIG_EXAMPLE_WIFI_PASSWORD="my-wifi-password"
   

5. Monitor the serial output to view the sensor readings:

   Bash

   idf.py flash monitor --print-filter="app MQTT" -p /dev/ttyACM0
   

6. You should observe a similar output to the following on the serial console:

   Output

   --- esp-idf-monitor 1.6.0 on /dev/ttyACM0 115200
   --- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
   --- Print filter: "app MQTT"
   I (12218) app: [timeSynced,48] mqtt-client started
   I (12698) app: [publishTask,59] {"data":{"humidity":53.419921875,"light":63.33333206176758,"pressure":1010.489990234375,"temperature":25.489999771118164},"deviceEui":"1231231234","timestamp":1748820388730}
   I (12708) MQTT: publishing to topic 'sensor/data/925878', data '{"data":{"humidity":53.419921875,"light":63.33333206176758,"pressure":1010.489990234375,"temperature":25.489999771118164},"deviceEui":"1231231234","timestamp":1748820388730}'
   I (12748) MQTT: msg_id=15511
   

License

This project is licensed under the MIT License. See the LICENSE file for details.

References

• Devkit: https://www.waveshare.com/wiki/ESP32-C6-Zero
• BH1750: https://esphome.io/components/sensor/bh1750.html
• BME280 (I2C): https://esphome.io/components/sensor/bme280.html