Wio Tracker LTE and SORACOM Harvest w/ Grove touch sensor

WioLTE_MFT2017.ino

/* LED status
 *  bootup = Purple
 *  connect sucessful = Green
 *  Sensor Open = White
 *  Sensor Close = Blue
 */

/*
 * D38: "Grove Touch sensor" or "Magnetic door Switch w/ Grove connector made in max"
 */
#define GROVE_PIN 38

#define LED_PIN 10

#define HOST "harvest.soracom.io"
#define PORT 8514

#define USE_CELLULAR
#include <wiolte-driver.h>
WioLTE wio;

#include <LoopbackStream.h>
LoopbackStream msgpack_buffer;
LoopbackStream json_buffer;
#include "msgpck.h"

void error_led() { wio.LedSetRGB(127, 0, 0); }
void bootup_led() { wio.LedSetRGB(127, 0, 127); }
void connected_led() { wio.LedSetRGB(0, 127, 0); }
void sensor_off() { wio.LedSetRGB(63, 63, 63); }
void sensor_on() { wio.LedSetRGB(0, 0, 127); }

void setup() {
  delay(500);
  SerialUSB.println("board> bootup WioLTE w/ LTE module");
  
  wio.Init();
  bootup_led();
  SerialUSB.println("board> Waiting 15 seconds for Init/PowerOn");
  wio.PowerSupplyLTE(true);
  delay(3000); /* waiting for bootup */
  if (wio.TurnOnOrReset()) {
    SerialUSB.println("modem> TurnOnOrReset successful");
  } else {
    error_led();
    SerialUSB.println("modem> TurnOnOrReset failed");
    return;
  }
  
#ifdef USE_CELLULAR
  if (wio.Activate("soracom.io", "sora", "sora")) {
    connected_led();
    SerialUSB.println("modem> Activate(connect) successful");
    delay(1000);
  } else {
    error_led();
    SerialUSB.println("modem> Activate(connect) failed");
    return;
  }
#endif  
  pinMode(GROVE_PIN, INPUT);
}

uint8_t latest_state = 0;
void loop() {
  uint8_t val = digitalRead(GROVE_PIN);
  SerialUSB.println(val);
  if (val == 0) { sensor_off(); } else { sensor_on(); }
  if (latest_state == val) { return; } else { latest_state = val; }
  
  msgpck_write_map_header(&msgpack_buffer, 1);
  msgpck_write_string(&msgpack_buffer, "val"); /* write key name */
  msgpck_write_integer(&msgpack_buffer, val); /* write value */

  msgpck_to_json(&json_buffer, &msgpack_buffer);
  String json = json_buffer.readString();
  char payload[json.length()+1];
  json.toCharArray(payload, json.length()+1);
  SerialUSB.println(payload);

#ifdef USE_CELLULAR
  int connectId = wio.SocketOpen(HOST, PORT, WIOLTE_UDP);
  SerialUSB.print("modem> ConnectId: ");
  SerialUSB.println(connectId);
  if (connectId < 0) {
    SerialUSB.println("modem> SocketOpen failed");
  }
  
  if (wio.SocketSend(connectId, payload)) {
    SerialUSB.println("modem> SocketSend Successful");
    char res[127];
    if (wio.SocketReceive(connectId, res, sizeof (res)) < 0) {
      SerialUSB.println("modem> SocketReceive failed");
      error_led();
    }
    SerialUSB.println(res);
  } else {
    SerialUSB.println("modem> SocketSend failed");
    error_led();
  }

  if (wio.SocketClose(connectId)) {
    SerialUSB.println("modem> SocketClose Successful");
  } else {
    SerialUSB.println("modem> SocketClose failed");
    error_led();
  }
#endif
}