“ESP32 + LoRa” Preparation & Config Parameters

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Preparation


Installing Library


We provided a ESP32 LoRaWAN library, which migration from the LoRaMac-node library:

https://github.com/HelTecAutomation/ESP32_LoRaWAN

Choose one of the following method to install this library:

  1. download a zip file from GitHub using the “Download ZIP” button and install it using the IDE (”Sketch” -> “Include Library” -> “Add .ZIP Library…”

  2. clone this git repository into your sketchbook/libraries folder.

For more information, see https://www.arduino.cc/en/Guide/Libraries.

Configure Parameters

No matter what LoRa management platform is used, DevEui, AppKey, etc. parameters are must needed. And ensure that it is consistent with the relevant settings on the server.

  • The following parameters are essential for OTAA mode:

    • DevEui – Mote device IEEE EUI (big endian), 8 bytes;

    • AppEui – Application IEEE EUI (big endian), 8 bytes;

    • AppKey – AES encryption/decryption cipher application key, 16 bytes;

  • The following parameters are essential for ABP mode:

    • NwkSKey – AES encryption/decryption cipher network session key, 16 bytes;

    • AppSKey – AES encryption/decryption cipher application session key, 16 bytes;

    • DevAddr – Device address on the network (big endian), uint32_t;

Choose an example from menu File -- Examples -- ESP32_LoRaWAN -- OTAA.

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The LoRaWAN relevant parameters are in the .ino file, fix it in the code directly.

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Choose Frequency Band

There are some options in the Arduino Tools menu:

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Board, Upload Speed, CPU Frequency, Core Debug Level, PSRAM are ESP32 chip’s normal option, just keep default. Special notice the LoRaWan Region and LoRaWan Debug Level:

  • LoRaWan Region – LoRaWAN protocol region definition, strictly follow LoRaWAN™ 1.0.2 Regional Parameters rB;

  • LoRaWan Debug Level – Messages printed via serial.

    • None – Default;

    • Freq – Uplink/downlink frequency;

    • Freq && DIO – Uplink/downlink frequency and DIO interrupt information;

    • Freq && DIO && PW – Uplink/downlink frequency, DIO interrupt information and low power status.

  • LORAWAN_DEVEUI – LoRaWAN Device EUI generate method

    • CUSTOM – Defined by the user in the DevEui array of the code, 8 bytes;

    • Generate By ChipID – Generated according to the Chip ID of the chip. Selecting this option will override the setting in the DevEui array in the code.

Note

Print too much messages may cause the system unstable.