用搭积木的方式自制一个NFC读卡器

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地铁刷卡、上下班门禁打卡、高铁进站刷身份证、Apple Pay 购物……这些日常使用场景，都使用了 NFC 非接触式识别和互联技术，极大地方便了人们的生活。

不过，目前市面上常见的NFC无线读卡器都使用 WIFI 或蓝牙进行数据传输，功耗较高、且传输距离有限。而如果采用 LoRaWAN^® 传输，则可以解决上述问题。事实上，基于 LoRaWAN^® 的 NFC 读卡器优点突出：

LoRaWAN^®的传输距离远、接收灵敏度高、且功耗低
采用LoRaWAN^® 无线传输的读卡器安装部署方便
能使用电池供电、可持续使用半年以上。

本文将通过瑞科慧联的模块化开发套件 WisBlock 教大家快速搭建一个支持LoRaWAN^® 的无线读卡器，让这个读卡器读到电子标签数据时，可以自动将数据上传到 LoRaWAN^® 服务器上。WisBlock 其实是一个物联网解决方案设计生态系统，由可拼接的模块和易于使用的软件工具组成，可加快物联网产品生产周期、缩短上市时间。

搭建 LoRaWAN^® NFC 读卡器概述

本次搭建使用的硬件是瑞科慧联（RAK）的 WisBlock 套件，MCU 选择的是RAK4631 WisBlock Core 模块，该模块采用强大的 Nordic nRF52840 MCU，可以支持蓝牙 5.0（蓝牙低能耗），以及 Semtech 最新的 LoRa^® 收发器 SX1262，支持 LoRa^® 和蓝牙两种通信模式。该 NFC 还选择了 WisBlock 套件的 RAK13600 NFC 读卡器模组，它使用的是 PN532 芯片，可以支持 ISO/ICE 14443A/B 卡类型的读写，而且还搭配了一个蜂鸣器模组 RAK18001，当 NFC 刷卡有效时，蜂鸣器会发出响声提醒。

对了，该 NFC 读卡器的搭建还会使用到瑞科慧联（RAK）的低代码开发平台 RUI3，它为 WisBlock 提供包含传感器驱动接口、无线发送接口等丰富的 API接口函数，这样我们只需要写少量的应用代码就可以完成此产品搭建了。

硬件电路搭建

硬件准备

首先我们需要准备 RAK4631 模块、RAK5005-O 底板、RAK13600 NFC 读卡器、RAK18001 蜂鸣器、两张 ISO 14443B 卡、一根 LoRa^® 天线、一根 NFC天线、一个 Unify 外壳、一根蓝牙天线（安装在外壳内）。

硬件组装

把 RAK4631 模块扣在 CPU SLOT 的位置，RAK13600 扣在 IO SLOT 的位置，RAK18001 扣在 SLOT A（或者SLOT B），并且使用螺丝把模组固定。

连接 NFC 天线、LoRa^® 天线、蓝牙天线，并安装至外壳中。硬件组装完成之后就可以进行软件设置。

软件环境搭建

在Arduino IDE中添加 RAK4631-R 开发板

打开 Arduino IDE，进入“文件 > 首选项”

单击图中图标，修改“附加开发板管理器网址”选项，将 RAK4631-R WisBlock Core 添加中 Arduino 开发板管理器中。

现在复制这个 URL https://raw.githubusercontent.com/RAKWireless/RAKwireless-Arduino-BSP-Index/main/package_rakwireless.com_rui_index.json 并粘贴至下图所示区域。如果已存在其他链接，将上述链接粘贴至新的一行。完成后，单击“好”。

重启 Arduino IDE。进入“工具 > 开发板：“RAK4631” > 开发板管理器”。

在搜索框中输入“RAK”，窗口会自动出现可用的RAKwireless WisBlock Core Boards，选择“RAKwireless RUI nRF Boards”并安装。

BSP 安装完成后，根据图中路径选择 RAKwireless WisBlock Core模块。

安装使用到的库

现在安装 RAK13600-PN532 库和 Adafruit bus 库：

代码开发

LoRaWAN^® 部分的初始化，此函数可以初始化协议栈的所有参数，入网方式是OTAA，用户需要根据自己的频段，入网参数修改此宏定义，代码中使用的频段是 AS923。

/*************************************

   LoRaWAN band setting:
     RAK_REGION_EU433
     RAK_REGION_CN470
     RAK_REGION_RU864
     RAK_REGION_IN865
     RAK_REGION_EU868
     RAK_REGION_US915
     RAK_REGION_AU915
     RAK_REGION_KR920
     RAK_REGION_AS923

 *************************************/
#define OTAA_BAND     (RAK_REGION_AS923) 
#define OTAA_DEVEUI   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
#define OTAA_APPEUI   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
#define OTAA_APPKEY   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

void lora_init()

/*************************************

LoRaWAN band setting:

RAK_REGION_EU433

RAK_REGION_CN470

RAK_REGION_RU864

RAK_REGION_IN865

RAK_REGION_EU868

RAK_REGION_US915

RAK_REGION_AU915

RAK_REGION_KR920

RAK_REGION_AS923

*************************************/

#define OTAA_BAND (RAK_REGION_AS923)

#define OTAA_DEVEUI {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

#define OTAA_APPEUI {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

#define OTAA_APPKEY {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

void lora_init()

蜂鸣器采用的是 PWM 控制，所以要记住在未使用蜂鸣器时，记得关闭输出。

pinMode(BUZZER_CONTROL,OUTPUT);
 noTone(BUZZER_CONTROL);

1 2	pinMode(BUZZER_CONTROL,OUTPUT); noTone(BUZZER_CONTROL);

NFC 芯片初始化代码，采用 IIC 通信协议，初始化结束后，就可以使用 NFC的刷卡功能了。

nfc.begin();
  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print("Didn't find PN53x board");
    while (1); // halt
  }

  // Got ok data, print it out!
  Serial.print("Found chip PN5"); Serial.println((versiondata >> 24) & 0xFF, HEX);
  Serial.print("Firmware ver. "); Serial.print((versiondata >> 16) & 0xFF, DEC);
  Serial.print('.'); Serial.println((versiondata >> 8) & 0xFF, DEC);
  // Set the max number of retry attempts to read from a card
  // This prevents us from waiting forever for a card, which is
  // the default behaviour of the PN532.
  nfc.setPassiveActivationRetries(0xFF);

  //configure board to read RFID tags
  nfc.SAMConfig();
  
  Serial.println("Waiting for an ISO14443A card");

nfc.begin();

uint32_t versiondata = nfc.getFirmwareVersion();

if (! versiondata) {

Serial.print("Didn't find PN53x board");

while (1); // halt

}

// Got ok data, print it out!

Serial.print("Found chip PN5"); Serial.println((versiondata >> 24) & 0xFF, HEX);

Serial.print("Firmware ver. "); Serial.print((versiondata >> 16) & 0xFF, DEC);

Serial.print('.'); Serial.println((versiondata >> 8) & 0xFF, DEC);

// Set the max number of retry attempts to read from a card

// This prevents us from waiting forever for a card, which is

// the default behaviour of the PN532.

nfc.setPassiveActivationRetries(0xFF);

//configure board to read RFID tags

nfc.SAMConfig();

Serial.println("Waiting for an ISO14443A card");

每间隔 1 秒循环读取是否有 NFC 卡存在，如果读取 ID 成功，蜂鸣器会响 150 毫秒左右，然后发送卡 ID 到 LoRaWAN^® 服务器上。

void loop(void) {
  boolean success;
  uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };	// Buffer to store the returned UID
  uint8_t uidLength;				// Length of the UID (4 or 7 bytes dep        ending on ISO14443A card type)

  // Wait for an ISO14443B type cards (Mifare, etc.).  When one is found
  // 'uid' will be populated with the UID, and uidLength will indicate
  // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
  success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);

  if (success) {
    tone(BUZZER_CONTROL,4000);
    delay(150);
    noTone(BUZZER_CONTROL);
    Serial.println("Found a card!");
    Serial.print("UID Length: "); Serial.print(uidLength, DEC); Serial.println(" byte       s");
    Serial.print("UID Value: ");
    for (uint8_t i = 0; i < uidLength; i++)
    {
      Serial.print(" 0x"); Serial.print(uid[i], HEX);
    }
    Serial.println("");

   digitalWrite(ledPin1, HIGH); // LED turn on when input pin value is HIGH
   delay(150);
   digitalWrite(ledPin1, LOW); // 

  /** Send the data package */
  if (api.lorawan.send(uidLength, (uint8_t *) & uid, 2, true, 1)) 
  {
    Serial.println("Sending is requested");
  } 
  else 
  {
    Serial.println("Sending failed");
  }
    
    // Wait 1 second before continuing
    delay(1000);
  }
  else
  {
    // PN532 probably timed out waiting for a card
    Serial.println("Timed out waiting for a card");
  }
}

void loop(void) {

boolean success;

uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID

uint8_t uidLength; // Length of the UID (4 or 7 bytes dep ending on ISO14443A card type)

// Wait for an ISO14443B type cards (Mifare, etc.). When one is found

// 'uid' will be populated with the UID, and uidLength will indicate

// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)

success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);

if (success) {

tone(BUZZER_CONTROL,4000);

delay(150);

noTone(BUZZER_CONTROL);

Serial.println("Found a card!");

Serial.print("UID Length: "); Serial.print(uidLength, DEC); Serial.println(" byte s");

Serial.print("UID Value: ");

for (uint8_t i = 0; i < uidLength; i++)

{

Serial.print(" 0x"); Serial.print(uid[i], HEX);

}

Serial.println("");

digitalWrite(ledPin1, HIGH); // LED turn on when input pin value is HIGH

delay(150);

digitalWrite(ledPin1, LOW); //

/** Send the data package */

if (api.lorawan.send(uidLength, (uint8_t *) & uid, 2, true, 1))

{

Serial.println("Sending is requested");

}

else

{

Serial.println("Sending failed");

}

// Wait 1 second before continuing

delay(1000);

}

else

{

// PN532 probably timed out waiting for a card

Serial.println("Timed out waiting for a card");

}

数据日志

本地串口日志的信息如下所示：

RAK7268 内置 LoRaWAN^® 服务器日志：

备注：全部源代码如下所示

/**
   @file iso14443a_uid.ino
   @author rakwireless.com
   @brief This example will attempt to connect to an ISO14443A card and read card UID
   @version 0.1
   @date 2021-10-14
   @copyright Copyright (c) 2021
**/
/**************************************************************************/
#include <Wire.h>
#include <SPI.h>
#include <RAK13600-PN532.h> // Click here to get the library: http://librarymanager/All#RAK13600-PN532

/*************************************

   LoRaWAN band setting:
     RAK_REGION_EU433
     RAK_REGION_CN470
     RAK_REGION_RU864
     RAK_REGION_IN865
     RAK_REGION_EU868
     RAK_REGION_US915
     RAK_REGION_AU915
     RAK_REGION_KR920
     RAK_REGION_AS923

 *************************************/

#define OTAA_BAND     (RAK_REGION_AS923) 
#define OTAA_DEVEUI   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
#define OTAA_APPEUI   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}
#define OTAA_APPKEY   {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88} 


// If using the breakout or shield with I2C, define just the pins connected
#define PN532_IRQ   (WB_IO6)
#define PN532_RESET (WB_IO5)  // Not connected by default on the NFC Shield
#define BUZZER_CONTROL  WB_IO1

uint8_t ledPin1 = LED_GREEN;
uint8_t ledPin2 = LED_BLUE;

// Or use this line for a breakout or shield with an I2C connection:
NFC_PN532 nfc(PN532_IRQ, PN532_RESET);

void lora_init();

void setup(void) {
  Serial.begin(115200);
  pinMode(WB_IO2, OUTPUT);
  digitalWrite(WB_IO2, HIGH);

  pinMode(BUZZER_CONTROL,OUTPUT);
  noTone(BUZZER_CONTROL);

  // initialize the LED pin as an output
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);

  lora_init(); 
  
  delay(300);
  while (!Serial) delay(10);
  Serial.println("Hello!");
  nfc.begin();
  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print("Didn't find PN53x board");
    while (1); // halt
  }

  // Got ok data, print it out!
  Serial.print("Found chip PN5"); Serial.println((versiondata >> 24) & 0xFF, HEX);
  Serial.print("Firmware ver. "); Serial.print((versiondata >> 16) & 0xFF, DEC);
  Serial.print('.'); Serial.println((versiondata >> 8) & 0xFF, DEC);
  // Set the max number of retry attempts to read from a card
  // This prevents us from waiting forever for a card, which is
  // the default behaviour of the PN532.
  nfc.setPassiveActivationRetries(0xFF);

  //configure board to read RFID tags
  nfc.SAMConfig();
  
  Serial.println("Waiting for an ISO14443A card");
}

void loop(void) {
  boolean success;
  uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };	// Buffer to store the returned UID
  uint8_t uidLength;				// Length of the UID (4 or 7 bytes depending on ISO14443A card type)

  // Wait for an ISO14443B type cards (Mifare, etc.).  When one is found
  // 'uid' will be populated with the UID, and uidLength will indicate
  // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
  success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);

  if (success) {
    tone(BUZZER_CONTROL,4000);
    delay(150);
    noTone(BUZZER_CONTROL);
    Serial.println("Found a card!");
    Serial.print("UID Length: "); Serial.print(uidLength, DEC); Serial.println(" bytes");
    Serial.print("UID Value: ");
    for (uint8_t i = 0; i < uidLength; i++)
    {
      Serial.print(" 0x"); Serial.print(uid[i], HEX);
    }
    Serial.println("");

   digitalWrite(ledPin1, HIGH); // LED turn on when input pin value is HIGH
   delay(150);
   digitalWrite(ledPin1, LOW); // 

  /** Send the data package */
  if (api.lorawan.send(uidLength, (uint8_t *) & uid, 2, true, 1)) 
  {
    Serial.println("Sending is requested");
  } 
  else 
  {
    Serial.println("Sending failed");
  }
    
    // Wait 1 second before continuing
    delay(1000);
  }
  else
  {
    // PN532 probably timed out waiting for a card
    Serial.println("Timed out waiting for a card");
  }
}


void lora_init()
{
   // OTAA Device EUI MSB first
  uint8_t node_device_eui[8] = OTAA_DEVEUI;
  // OTAA Application EUI MSB first
  uint8_t node_app_eui[8] = OTAA_APPEUI;
  // OTAA Application Key MSB first
  uint8_t node_app_key[16] = OTAA_APPKEY;

  if (!api.lorawan.appeui.set(node_app_eui, 8)) {
    Serial.printf("LoRaWan OTAA - set application EUI is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.appkey.set(node_app_key, 16)) {
    Serial.printf("LoRaWan OTAA - set application key is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.deui.set(node_device_eui, 8)) {
    Serial.printf("LoRaWan OTAA - set device EUI is incorrect! \r\n");
    return;
  }

  if (!api.lorawan.band.set(OTAA_BAND)) {
    Serial.printf("LoRaWan OTAA - set band is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.deviceClass.set(RAK_LORA_CLASS_A)) {
    Serial.printf("LoRaWan OTAA - set device class is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.njm.set(RAK_LORA_OTAA))  // Set the network join mode to OTAA
  {
    Serial.
  printf("LoRaWan OTAA - set network join mode is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.join())  // Join to Gateway
  {
    Serial.printf("LoRaWan OTAA - join fail! \r\n");
    return;
  }

  /** Wait for Join success */
  while (api.lorawan.njs.get() == 0) {
    Serial.print("Wait for LoRaWAN join...");
    api.lorawan.join();
    delay(10000);
  }

  if (!api.lorawan.adr.set(true)) {
    Serial.printf
  ("LoRaWan OTAA - set adaptive data rate is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.rety.set(1)) {
    Serial.printf("LoRaWan OTAA - set retry times is incorrect! \r\n");
    return;
  }
  if (!api.lorawan.cfm.set(1)) {
    Serial.printf("LoRaWan OTAA - set confirm mode is incorrect! \r\n");
    return;
  }

  /** Check LoRaWan Status*/
  Serial.printf("Duty cycle is %s\r\n", api.lorawan.dcs.get()? "ON" : "OFF"); // Check Duty Cycle status
  Serial.printf("Packet is %s\r\n", api.lorawan.cfm.get()? "CONFIRMED" : "UNCONFIRMED");  // Check Confirm status
  uint8_t assigned_dev_addr[4] = { 0 };
  api.lorawan.daddr.get(assigned_dev_addr, 4);
  Serial.printf("Device Address is %02X%02X%02X%02X\r\n", assigned_dev_addr[0], assigned_dev_addr[1], assigned_dev_addr[2], assigned_dev_addr[3]);  // Check Device Address
  Serial.println("");
}

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/**

@file iso14443a_uid.ino

@author rakwireless.com

@brief This example will attempt to connect to an ISO14443A card and read card UID

@version 0.1

@date 2021-10-14

**/

/**************************************************************************/

#include <Wire.h>

#include <SPI.h>

#include <RAK13600-PN532.h> // Click here to get the library: http://librarymanager/All#RAK13600-PN532

/*************************************

LoRaWAN band setting:

RAK_REGION_EU433

RAK_REGION_CN470

RAK_REGION_RU864

RAK_REGION_IN865

RAK_REGION_EU868

RAK_REGION_US915

RAK_REGION_AU915

RAK_REGION_KR920

RAK_REGION_AS923

*************************************/

#define OTAA_BAND (RAK_REGION_AS923)

#define OTAA_DEVEUI {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

#define OTAA_APPEUI {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

#define OTAA_APPKEY {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88}

// If using the breakout or shield with I2C, define just the pins connected

#define PN532_IRQ (WB_IO6)

#define PN532_RESET (WB_IO5) // Not connected by default on the NFC Shield

#define BUZZER_CONTROL WB_IO1

uint8_t ledPin1 = LED_GREEN;

uint8_t ledPin2 = LED_BLUE;

// Or use this line for a breakout or shield with an I2C connection:

NFC_PN532 nfc(PN532_IRQ, PN532_RESET);

void lora_init();

void setup(void) {

Serial.begin(115200);

pinMode(WB_IO2, OUTPUT);

digitalWrite(WB_IO2, HIGH);

pinMode(BUZZER_CONTROL,OUTPUT);

noTone(BUZZER_CONTROL);

// initialize the LED pin as an output

pinMode(ledPin1, OUTPUT);

pinMode(ledPin2, OUTPUT);

lora_init();

delay(300);

while (!Serial) delay(10);

Serial.println("Hello!");

nfc.begin();

uint32_t versiondata = nfc.getFirmwareVersion();

if (! versiondata) {

Serial.print("Didn't find PN53x board");

while (1); // halt

}

// Got ok data, print it out!

Serial.print("Found chip PN5"); Serial.println((versiondata >> 24) & 0xFF, HEX);

Serial.print("Firmware ver. "); Serial.print((versiondata >> 16) & 0xFF, DEC);

Serial.print('.'); Serial.println((versiondata >> 8) & 0xFF, DEC);

// Set the max number of retry attempts to read from a card

// This prevents us from waiting forever for a card, which is

// the default behaviour of the PN532.

nfc.setPassiveActivationRetries(0xFF);

//configure board to read RFID tags

nfc.SAMConfig();

Serial.println("Waiting for an ISO14443A card");

}

void loop(void) {

boolean success;

uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID

uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)

// Wait for an ISO14443B type cards (Mifare, etc.). When one is found

// 'uid' will be populated with the UID, and uidLength will indicate

// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)

success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength);

if (success) {

tone(BUZZER_CONTROL,4000);

delay(150);

noTone(BUZZER_CONTROL);

Serial.println("Found a card!");

Serial.print("UID Length: "); Serial.print(uidLength, DEC); Serial.println(" bytes");

Serial.print("UID Value: ");

for (uint8_t i = 0; i < uidLength; i++)

{

Serial.print(" 0x"); Serial.print(uid[i], HEX);

}

Serial.println("");

digitalWrite(ledPin1, HIGH); // LED turn on when input pin value is HIGH

delay(150);

digitalWrite(ledPin1, LOW); //

/** Send the data package */

if (api.lorawan.send(uidLength, (uint8_t *) & uid, 2, true, 1))

{

Serial.println("Sending is requested");

}

else

{

Serial.println("Sending failed");

}

// Wait 1 second before continuing

delay(1000);

}

else

{

// PN532 probably timed out waiting for a card

Serial.println("Timed out waiting for a card");

}

void lora_init()

{

// OTAA Device EUI MSB first

uint8_t node_device_eui[8] = OTAA_DEVEUI;

// OTAA Application EUI MSB first

uint8_t node_app_eui[8] = OTAA_APPEUI;

// OTAA Application Key MSB first

uint8_t node_app_key[16] = OTAA_APPKEY;

if (!api.lorawan.appeui.set(node_app_eui, 8)) {

Serial.printf("LoRaWan OTAA - set application EUI is incorrect! \r\n");

return;

}

if (!api.lorawan.appkey.set(node_app_key, 16)) {

Serial.printf("LoRaWan OTAA - set application key is incorrect! \r\n");

return;

}

if (!api.lorawan.deui.set(node_device_eui, 8)) {

Serial.printf("LoRaWan OTAA - set device EUI is incorrect! \r\n");

return;

}

if (!api.lorawan.band.set(OTAA_BAND)) {

Serial.printf("LoRaWan OTAA - set band is incorrect! \r\n");

return;

}

if (!api.lorawan.deviceClass.set(RAK_LORA_CLASS_A)) {

Serial.printf("LoRaWan OTAA - set device class is incorrect! \r\n");

return;

}

if (!api.lorawan.njm.set(RAK_LORA_OTAA)) // Set the network join mode to OTAA

{

Serial.

printf("LoRaWan OTAA - set network join mode is incorrect! \r\n");

return;

}

if (!api.lorawan.join()) // Join to Gateway

{

Serial.printf("LoRaWan OTAA - join fail! \r\n");

return;

}

/** Wait for Join success */

while (api.lorawan.njs.get() == 0) {

Serial.print("Wait for LoRaWAN join...");

api.lorawan.join();

delay(10000);

}

if (!api.lorawan.adr.set(true)) {

Serial.printf

("LoRaWan OTAA - set adaptive data rate is incorrect! \r\n");

return;

}

if (!api.lorawan.rety.set(1)) {

Serial.printf("LoRaWan OTAA - set retry times is incorrect! \r\n");

return;

}

if (!api.lorawan.cfm.set(1)) {

Serial.printf("LoRaWan OTAA - set confirm mode is incorrect! \r\n");

return;

}

/** Check LoRaWan Status*/

Serial.printf("Duty cycle is %s\r\n", api.lorawan.dcs.get()? "ON" : "OFF"); // Check Duty Cycle status

Serial.printf("Packet is %s\r\n", api.lorawan.cfm.get()? "CONFIRMED" : "UNCONFIRMED"); // Check Confirm status

uint8_t assigned_dev_addr[4] = { 0 };

api.lorawan.daddr.get(assigned_dev_addr, 4);

Serial.printf("Device Address is %02X%02X%02X%02X\r\n", assigned_dev_addr[0], assigned_dev_addr[1], assigned_dev_addr[2], assigned_dev_addr[3]); // Check Device Address

Serial.println("");

}

Nicholas Dong 董巷

文章翻译者：Nicholas，技术支持工程师、瑞科慧联（RAK）高级工程师，深耕嵌入式开发技术、物联网行业多年，拥有丰富的行业经验和新颖独到的眼光！

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