SORACOM Technology Camp 2018の会場で販売していた『PUSH for Wio』を組み立ててみました ref: https://qiita.com/KazuyukiEguchi/items/79b4a3af1d06757ddb08

pushwio.ino

// Wio LTE用 PUSH-WIO用のコード
// Programed by Kazuyuki Eguchi

// Serial端子に、秋月GPSGROVE - 4ピン-ジャンパメスケーブル 20cm経由で接続
// D38端子に、Grove Button(P)を接続

// TinyGPSPlus 1.0.2 http://arduiniana.org/libraries/tinygpsplus/

#include <WioLTEforArduino.h>
#include <TinyGPS++.h>
#include <stdio.h>

#define APN               "soracom.io"
#define USERNAME          "sora"
#define PASSWORD          "sora"

#define BUTTON_PIN  (WIOLTE_D38)

#define WEBHOOK_EVENTNAME ""
#define WEBHOOK_KEY       ""
#define WEBHOOK_URL       "https://maker.ifttt.com/trigger/"WEBHOOK_EVENTNAME"/with/key/"WEBHOOK_KEY

WioLTE Wio;
TinyGPSPlus gps;

char datetime[50];
char gpsdata[50];

void setup() {
  pinMode(BUTTON_PIN, INPUT);

  delay(200);

  SerialUSB.println("### I/O Initialize.");
  Wio.Init();
  Wio.LedSetRGB(0x00, 0xff, 0x00);

  SerialUSB.println("### Power supply ON.");
  Wio.PowerSupplyGrove(true);
  Wio.PowerSupplyLTE(true);
  delay(500);

  SerialUSB.println("### Turn on or reset.");
  if (!Wio.TurnOnOrReset()) {
    SerialUSB.println("### ERROR! ###");
    return;
  }

  SerialUSB.println("### Connecting to \""APN"\".");
  if (!Wio.Activate(APN, USERNAME, PASSWORD)) {
    SerialUSB.println("### ERROR! ###");
    return;
  }

  Serial.begin(9600);
  sprintf(gpsdata," ");
  sprintf(datetime," ");
  SerialUSB.println("### Setup completed.");
}

void loop() {
  char data[100];
  int status;
  int buttonState = digitalRead(BUTTON_PIN);

  Wio.LedSetRGB(0x00, 0x00, 0xff);

  // SerialUSB.print(buttonState);

  if(gps.date.isValid())
  {
    sprintf(datetime,"%04d/%02d/%02d %02d:%02d:%02d UTC"
    ,gps.date.year()
    ,gps.date.month()
    ,gps.date.day()
    ,gps.time.hour()
    ,gps.time.minute()
    ,gps.time.second());
    // SerialUSB.println(datetime);
  }

  if (gps.location.isUpdated()){
    sprintf(gpsdata,"%f,%f",gps.location.lat(),gps.location.lng());
    // SerialUSB.println(gpsdata);
  }  

  // ボタンを押されたら、IFTTT Webhookで通知する
  if(buttonState == 1)
  {
    Wio.LedSetRGB(0xff, 0x00, 0x00);
    SerialUSB.println("### Post.");
    sprintf(data, "{\"value1\":\"%s\",\"value2\":\"%s\"}",datetime,gpsdata);
    SerialUSB.print("Post:");
    SerialUSB.print(data);
    SerialUSB.println("");
    if (!Wio.HttpPost(WEBHOOK_URL, data, &status)) {
      SerialUSB.println("### ERROR! ###");
      goto err;
    }
    SerialUSB.print("Status:");
    SerialUSB.println(status);
  }

err:
  while (Serial.available()) {
    char data = Serial.read();
    gps.encode(data);
  }
}