【IoT】LTE-M Shield for ArduinoでCBOR形式データをSORACOMに送信してみた

#define CONSOLE Serial
#define INTERVAL_MS (60000)
#define ENDPOINT "uni.soracom.io"
#define SKETCH_NAME "send_uptime_with_soracom_UDP_CBOR"
#define VERSION "1.0"

/* for CBOR */
#include <tinycbor.h>  // https://intel.github.io/tinycbor/current/a00046.html
//#include <float.h>

/* for LTE-M Shield for Arduino */
#define RX 10
#define TX 11
#define BAUDRATE 9600
#define BG96_RESET 15

#define TINY_GSM_MODEM_BG96
#include <TinyGsmClient.h>

#include <SoftwareSerial.h>
SoftwareSerial LTE_M_shieldUART(RX, TX);
TinyGsm modem(LTE_M_shieldUART);
TinyGsmClient ctx(modem);

void setup() {
  CONSOLE.begin(9600);

  CONSOLE.println();
  CONSOLE.print(F("Welcome to "));
  CONSOLE.print(SKETCH_NAME);
  CONSOLE.print(F(" "));
  CONSOLE.println(VERSION);
  /*
  CONSOLE.print(F("resetting module "));
  pinMode(BG96_RESET, OUTPUT);
  digitalWrite(BG96_RESET, LOW);
  delay(300);
  digitalWrite(BG96_RESET, HIGH);
  delay(300);
  digitalWrite(BG96_RESET, LOW);
  CONSOLE.println(F(" done."));
*/
  LTE_M_shieldUART.begin(BAUDRATE);
  /*
  CONSOLE.print(F("modem.restart()"));
  modem.restart();
  CONSOLE.println(F(" done."));
*/
  CONSOLE.print(F("modem.init()"));
  modem.init();
  CONSOLE.println(F(" done."));

  /*
  CONSOLE.print(F("modem.getModemInfo(): "));
  String modemInfo = modem.getModemInfo();
  CONSOLE.println(modemInfo);
*/
  CONSOLE.print(F("waitForNetwork()"));
  while (!modem.waitForNetwork()) CONSOLE.print(".");
  CONSOLE.println(F(" Ok."));

  CONSOLE.print(F("gprsConnect(soracom.io)"));
  modem.gprsConnect("soracom.io", "sora", "sora");
  CONSOLE.println(F(" done."));

  CONSOLE.print(F("isNetworkConnected()"));
  while (!modem.isNetworkConnected()) CONSOLE.print(".");
  CONSOLE.println(F(" Ok."));
  /*
  CONSOLE.print(F("My IP addr: "));
  IPAddress ipaddr = modem.localIP();
  CONSOLE.println(ipaddr);
*/
}

void loop() {
  uint32_t uptime_sec = millis() / 1000;
  CONSOLE.print(F("uptime_sec: "));
  CONSOLE.println(uptime_sec);

  // CBOR
  // バイナリパーサーフォーマット： @cbor
  uint8_t cborData[128];  // この数字が大きいと、UDP接続がfalseになる。
  // Initialize TinyCBOR library.
  TinyCBOR.init();
  // Assign buffer to encoder.
  TinyCBOR.Encoder.init(cborData, sizeof(cborData));

  // Typically, the first element is an array or a map.
  TinyCBOR.Encoder.create_map(1);  //データの数を指定
  {
    TinyCBOR.Encoder.encode_text_stringz("upTime");
    TinyCBOR.Encoder.encode_uint(millis() / 1000);
    //TinyCBOR.Encoder.encode_text_stringz("upTime");
    //TinyCBOR.Encoder.encode_int(millis() / 1000); // int
    //TinyCBOR.Encoder.encode_text_stringz("upTimeFloat");
    //TinyCBOR.Encoder.encode_float(millis() / 1000.0); // float
  }
  TinyCBOR.Encoder.close_container();

  CONSOLE.print(F("cborBufferSize: "));
  CONSOLE.println(TinyCBOR.Encoder.get_buffer_size());

  // SORACOMに接続
  int mux = 0;
  modem.sendAT(GF("+QIOPEN=1,"), mux, GF(",\"UDP\",\""), ENDPOINT, GF("\","), 23080, GF(",0,0"));
  modem.waitResponse();

  // 接続の応答を待つ
  uint32_t timeout_ms = 15 * 1000;  // ライブラリでは150秒だが、長いため15秒とする
  if (modem.waitResponse(timeout_ms, GF(GSM_NL "+QIOPEN:")) != 1) {
    CONSOLE.println(F("failed."));
    delay(3000);
    return;
  }

  // 送信
  CONSOLE.println(F("send"));
  ctx.write(cborData, TinyCBOR.Encoder.get_buffer_size());
  ctx.stop();

  delay(INTERVAL_MS);
} 

TinyCBOR.Encoder.create_map(1);  //データの数を指定
{
  TinyCBOR.Encoder.encode_text_stringz("upTime");
  TinyCBOR.Encoder.encode_uint(millis() / 1000);
}
TinyCBOR.Encoder.close_container();