🛠 Première configuration du module LoRa

Objectives

Get the LoRa radio of the MKR WAN 1310 up and running: the Murata CMWX1ZZABZ module embeds a second processor (STM32L0 + Semtech SX1276 transceiver) that communicates via AT commands over SPI. We update its firmware, then check the version, band, and radio serial number (deviceEUI). Note: this board has no Wi-Fi or Bluetooth; connectivity is LoRa/LoRaWAN only.

Hardware

• 1 MKR WAN 1310 board with its penta-band antenna screwed onto the micro-UFL connector (never transmit without an antenna)
• Micro-USB cable
• MKRWAN library (v1.1.2) and ArduinoCore-samd core installed

Complete code

// Mise en route du module : version, bande, deviceEUI — MKR WAN 1310
#include <MKRWAN.h>

LoRaModem modem; // module embarqué (SPI + broches de contrôle)

void setup {
  Serial.begin(115200);
  while (!Serial);
  // Étape 1 : lancer l'exemple MKRWAN > MKRWANFWUpdate_standalone UNE fois
  // pour flasher le firmware AT récent (sinon "Firmware version mismatch").
  if (!modem.begin(EU868)) {          // bande choisie à l'exécution (AT+BAND)
    Serial.println("Demarrage module impossible");
    while (1) {}
  }
  Serial.print("Firmware AT : "); Serial.println(modem.version);
  Serial.print("deviceEUI  : "); Serial.println(modem.deviceEUI);
  // Le deviceEUI sert à enregistrer l'objet sur The Things Network.
}

void loop {}

Expected verification

The console displays a firmware version (1.1.x or 1.2.x) and a 16-digit hexadecimal deviceEUI. These two values should be noted for the following LoRaWAN tutorials.

Common errors

• "Firmware version mismatch": new firmware required, first run MKRWANFWUpdate_standalone or FWUpdaterBridge.
• Forgetting the micro-UFL antenna: transmitting without a load, resulting in zero range and risk to the RF stage.
• Confusing it with the MKR WAN 1300: the 1310 uses the SX1276 (137–1020 MHz, selective 433/868/915 MHz) and changes band at runtime; some Arduino sources still mention the SX1272.
• Wrong band: EU868 in Europe; a misconfigured US915 causes impossible joins.
• Known SPI issues on the 1310 (MKRWAN issue #86): completely power cycle the board if the module stops responding.