Define setting in Wio LTE by OTA (Tag of SORACOM Air SIM)

wio-lte-define-by-ota.ino

/*
  Tag on SORACOM Air SIM 
  key=_conf
  value={"working_mode":"uptime","loop_interval":5000,"send_cloud":true,"endpoint_host":"harvest.soracom.io","endpoint_port":8514} 
  (alt)value={"working_mode":"led","loop_interval":1000}
*/
#include <stdio.h>
#include <string.h>
#include <WioLTEforArduino.h>
WioLTE Wio;
#include <WioLTEClient.h>
WioLTEClient WioClient(&Wio);
#include <ArduinoJson.h>

#define USE_MODEM

#define CONF_TAG_NAME "_conf"
String working_mode;
int loop_interval = 10000;
boolean send_cloud = false;
const char *endpoint_host;
int endpoint_port = 0;

void conf_by_metadata();
void udp_send(const char *host, int port, const char *payload, char response[]);

void setup()
{
  delay(1000);
  SerialUSB.println("");
  SerialUSB.println("%% Wio.Init");
  Wio.Init();
  Wio.PowerSupplyGrove(true);
  Wio.LedSetRGB(0, 20, 16);
#ifdef USE_MODEM
  Wio.PowerSupplyLTE(true);
  delay(5000);
  Wio.LedSetRGB(31, 31, 0);
  SerialUSB.println("%% Wio.TurnOnOrReset");
  if (!Wio.TurnOnOrReset())
  {
    working_mode = "led";
    SerialUSB.println("%% ERROR: Wio.TurnOnOrReset");
    return;
  }

  Wio.LedSetRGB(31, 31, 31);
  SerialUSB.println("%% Wio.Activate");
  delay(5000);
  if (!Wio.Activate("soracom.io", "sora", "sora"))
  {
    SerialUSB.println("%% ERROR: Wio.Activate");
    return;
  }
  Wio.LedSetRGB(0, 0, 31);
  conf_by_metadata();
#endif
  Wio.LedSetRGB(0, 0, 0);
  if (working_mode.equalsIgnoreCase("led"))
  {
    // Setup for parameters in working mode when if you need
  }
  else if (working_mode.equalsIgnoreCase("uptime"))
  {
    // Setup for parameters in working mode when if you need
  }
}

volatile boolean led_state = false;
void loop()
{
  SerialUSB.println("%% loop");
  if (working_mode.equalsIgnoreCase("uptime"))
  {
    char payload[1024];
    sprintf(payload, "{\"uptime\":%lu}", millis() / 1000);
    SerialUSB.println(payload);
    char response[1024];
    if (send_cloud)
    {
      udp_send(endpoint_host, endpoint_port, payload, response);
      SerialUSB.println(response);
    }
    delay(loop_interval);
  }
  else
  {
    led_state = !led_state;
    if (led_state)
    {
      Wio.LedSetRGB(0, 20, 16);
    }
    else
    {
      Wio.LedSetRGB(0, 0, 0);
    }
    delay(loop_interval);
  }
}

void conf_by_metadata()
{
#ifdef USE_MODEM
  char subscriber[2048];
  SerialUSB.println("%% Wio.HttpGet");
  if (!Wio.HttpGet("http://metadata.soracom.io/v1/subscriber", subscriber, sizeof(subscriber)))
  {
    SerialUSB.println("%% ERROR: HttpGet");
    return;
  }
  StaticJsonBuffer<2048> jsonBuffer;
  JsonObject &root = jsonBuffer.parseObject(subscriber);
  if (!root.success())
  {
    SerialUSB.println("%% ERROR: JsonObject(root).success");
    return;
  }
  const char *conf_str = root["tags"][CONF_TAG_NAME];
  SerialUSB.println("conf_str:", conf_str);
  JsonObject &conf = jsonBuffer.parseObject(conf_str);
  if (!conf.success())
  {
    SerialUSB.println("%% ERROR: JsonObject(conf).success");
    return;
  }
  working_mode = conf["working_mode"].as<String>();
  loop_interval = conf["loop_interval"].as<int>();
  send_cloud = conf["send_cloud"].as<boolean>();
  endpoint_host = conf["endpoint_host"];
  endpoint_port = conf["endpoint_port"].as<int>();
#else
  // for development in local
  working_mode = "uptime";
  loop_interval = 3000;
  send_cloud = false;
  endpoint_host = "harvest.soracom.io";
  endpoint_port = 8514;
#endif
}

void udp_send(const char *host, int port, const char *payload, char response[])
{
  int connectId = Wio.SocketOpen(host, port, WIOLTE_UDP);
  if (connectId < 0)
  {
    SerialUSB.println("%% ERROR: Wio.SocketOpen");
    goto err_udp_send;
  }
  if (!Wio.SocketSend(connectId, payload))
  {
    SerialUSB.println("%% ERROR: Wio.SocketSend");
    goto err_udp_send;
  }
  int length;
  char res[1024];
  do
  {
    length = Wio.SocketReceive(connectId, res, sizeof(res));
    if (length < 0)
    {
      SerialUSB.println("%% ERROR: Wio.SocketReceive");
      goto err_udp_send;
    }
  } while (length == 0);
  for (uint16_t i = 0; i < sizeof(res); i++)
    response[i] = res[i];
err_udp_send:
  if (!Wio.SocketClose(connectId))
  {
    SerialUSB.println("%% ERROR: Wio.SocketClose");
  }
}