This is an exemple for ESP32 with arduino framework.
The system send a value, save the LMIC state and go to deep sleep. At wake up if a value was saved the systeme restore the saved state.
This example was tested with HELTEC board.
Only work on EU868.
Use:
- hardware AES for encoding.
- system random generator.
- RTC clock for timing.
Go deep sleep.
Work with platformio.
Open with platformio (VSCODE with Platformio extension)
In src directory create a file named lorakeys.h wich contain the keys declared in network (for exemple https://www.thethingsnetwork.org)
Exemple of file:
// Application in string format.
// For TTN issued EUIs the first bytes should be 70B3D5
constexpr char const appEui[] = "70B3D5XXXXXXXXXX";
// Device EUI in string format.
constexpr char const devEui[] = "XXXXXXXXXXXXXXXX";
// Application key in string format.
constexpr char const appKey[] = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
In main.cpp replace the content of do_send() with the data you want to send.
Check the pin configuration for your board in lmic_pins structure.