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World Clock for M5Stack with 3G Ext. board
/*
* Copyright (c) 2019 Kohei "Max" MATSUSHITA
* Released under the MIT license
* https://opensource.org/licenses/mit-license.php
*/
#include <M5Stack.h>
#define TINY_GSM_MODEM_UBLOX
#include <TinyGsmClient.h>
TinyGsm modem(Serial2); /* 3G board modem */
TinyGsmClient ctx(modem);
void setup() {
Serial.begin(115200);
M5.begin();
M5.Lcd.clear(BLACK);
M5.Lcd.setTextColor(WHITE);
M5.Lcd.println(F("M5Stack + 3G Module"));
M5.Lcd.print(F("modem.restart()"));
Serial2.begin(115200, SERIAL_8N1, 16, 17);
modem.restart();
M5.Lcd.println(F("done"));
M5.Lcd.print(F("getModemInfo:"));
String modemInfo = modem.getModemInfo();
M5.Lcd.println(modemInfo);
M5.Lcd.print(F("waitForNetwork()"));
while (!modem.waitForNetwork()) M5.Lcd.print(".");
M5.Lcd.println(F("Ok"));
M5.Lcd.print(F("gprsConnect(soracom.io)"));
modem.gprsConnect("soracom.io", "sora", "sora");
M5.Lcd.println(F("done"));
M5.Lcd.print(F("isNetworkConnected()"));
while (!modem.isNetworkConnected()) M5.Lcd.print(".");
M5.Lcd.println(F("Ok"));
M5.Lcd.print(F("My IP addr: "));
IPAddress ipaddr = modem.localIP();
M5.Lcd.print(ipaddr);
delay(2000);
}
void loop() {
M5.update();
M5.Lcd.clear(BLACK);
M5.Lcd.setCursor(0, 0);
M5.Lcd.println(F("World Clock from worldtimeapi.org"));
/* HTTP GET example */
if (!ctx.connect("worldtimeapi.org", 80)) {
Serial.println(F("Connect failed."));
return;
}
Serial.println(F("connected."));
/* send request */
ctx.println("GET /api/timezone/Asia/Tokyo.txt HTTP/1.0");
ctx.println("Host: worldtimeapi.org");
ctx.println();
Serial.println("sent.");
/* receive response */
while (ctx.connected()) {
String line = ctx.readStringUntil('\n');
Serial.println(line);
if (line == "\r") {
Serial.println("headers received.");
break;
}
}
char buf[1 * 1024] = {0};
ctx.readBytes(buf, sizeof(buf)); /* body */
ctx.stop();
M5.Lcd.println(buf);
delay(1000 * 10);
}
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