For a more in-depth guide on how to use this code is in this article.
This project connects an ESP32 (using the esp-idf) to an MQTT broker (provided by Losant) and collects the voltage of its battery source, publishes that voltage to an MQTT topic, and then sends the ESP32 into a deep sleep cycle for 15 minutes.
Since the ESP32 consumes a miniscule amount of power while in deep sleep, this project is great for IoT projects that make use of battery or solar power.
Update the following with your own credentials in main/app_main.c:
#define LOSANT_DEVICE_ID ""
#define LOSANT_ACCESS_KEY ""
#define LOSANT_ACCESS_SECRET ""
#define EXAMPLE_ESP_WIFI_SSID ""
#define EXAMPLE_ESP_WIFI_PASS ""Run idf.py build and confirm successful build.
Upon an successful build, run idf.py -p (PORT) flash monitor which will flash the firmware to the designated port, and open the serial monitor.
To find which port your ESP32 is connected to, see the esp-idf documentation on establishing a serial connection with the ESP32.
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Licensed under the MIT license.