Wio LTE M1/NB1 sample program

lte-m-sample.c

#include <WioCellLibforArduino.h>
#include <math.h>

#define L_EQUIP  100
#define L_MSG    100
#define T_SEND   1800
#define APN               "soracom.io"
#define USERNAME          "sora"
#define PASSWORD          "sora"
#define WEBHOOK_URL "http://beam.soracom.io:8888/lte-m/"

WioCellular Wio;

void ColorScale(double value, int *rr, int *gg, int *bb)
{ // https://qiita.com/krsak/items/94fad1d3fffa997cb651
    int r, g, b;
    double  tmp_val = cos( 4 * 3.14159 * value );
    int     col_val = (int)( ( -tmp_val / 2 + 0.5 ) * 255 );
         if ( value >= ( 4.0 / 4.0 ) ) { r = 255;     g = 0;       b = 0;       }
    else if ( value >= ( 3.0 / 4.0 ) ) { r = 255;     g = col_val; b = 0;       }
    else if ( value >= ( 2.0 / 4.0 ) ) { r = col_val; g = 255;     b = 0;       }
    else if ( value >= ( 1.0 / 4.0 ) ) { r = 0;       g = 255;     b = col_val; }
    else if ( value >= ( 0.0 / 4.0 ) ) { r = 0;       g = col_val; b = 255;     }
    else {                               r = 0;       g = 0;       b = 255;     }
    *rr = r; *gg = g; *bb = b;
    return;
}

void setup() {
  delay(200);

  SerialUSB.begin(115200);
  SerialUSB.println("Initialize.");
  Wio.Init();

  SerialUSB.println("Cellular ON.");
  Wio.PowerSupplyCellular(true);
  delay(500);

  SerialUSB.println("LED ON.");
  Wio.PowerSupplyLed(true);
  delay(500);
  Wio.LedSetRGB(1, 1, 1);

  SerialUSB.println("Turn on or reset.");
  if (!Wio.TurnOnOrReset()) {
    Wio.LedSetRGB(1, 0, 0);
    SerialUSB.println("failed.");
  }
  delay(500);
  
  SerialUSB.println("Connecting to \"" APN "\".");
  Wio.SetSelectNetwork(WioCellular::SELECT_NETWORK_MODE_MANUAL_IMSI);
  if (!Wio.Activate(APN, USERNAME, PASSWORD)) {
    Wio.LedSetRGB(1, 0, 0);
    SerialUSB.println("failed.");
  }

  char imei[L_EQUIP]; 
  SerialUSB.print("IMEI: ");
  if (Wio.GetIMEI(imei, L_EQUIP)) SerialUSB.println(imei);
  else                            SerialUSB.println("IMEI read error");

  char imsi[L_EQUIP];
  SerialUSB.print("IMSI: ");
  if (Wio.GetIMSI(imsi, L_EQUIP)) SerialUSB.println(imsi);
  else                            SerialUSB.println("IMSI read error");
}

void loop() {
  static int count=T_SEND;
  int rssi = Wio.GetReceivedSignalStrength();
  char msg[L_MSG];
  sprintf(msg, "Time left: %4d  RSSI: %d dBm", count, rssi);
  SerialUSB.println(msg);
  if (rssi == -999) Wio.LedSetRGB(0, 0, 1);
  else {
    int rr, gg, bb;
    ColorScale((rssi+109)/(109.-53.), &rr, &gg, &bb);
    int r = int (rr/25.5+0.5);
    int g = int (gg/25.5+0.5);
    int b = int (bb/25.5+0.5);
    Wio.LedSetRGB(r, g, b);
  }
  count --;
  if (count == 0) {
    Wio.LedSetRGB(0, 0, 0);
    SerialUSB.println(WEBHOOK_URL);
    char data[150];
    sprintf(data, "{\"rssi\":\"%d\",\"uptime\":\"%lu\"}", rssi, millis() / 1000);
    SerialUSB.print("Post: "); SerialUSB.print(data); SerialUSB.println("");
    int status=0;
    if (!Wio.HttpPost(WEBHOOK_URL, data, &status)) {
      SerialUSB.println("Post failed.");
    } else {
      SerialUSB.print("Status:"); SerialUSB.println(status);
    }
    count = T_SEND;
  }
  delay(2000);
}