付録

実験室で赤外リモコン送信テスト

内蔵の赤外LEDを用いて、ビデオカメラ操作する例を リスト 29 に示します。 ライブラリマネージャにて、IRremoteESP8266 をインストールしてください。ちなみに、テストしたバージョンは2.7.15でした。 2.7.15 より新しいバージョンだと、失敗する場合があります。もし最新版を入れてうまくいかない場合はダウングレードしてください。

リスト 29 src/irsend02.ino
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/* IRremoteESP8266: IRsendDemo - demonstrates sending IR codes with IRsend.

   Version 1.1 January, 2019
   Based on Ken Shirriff's IrsendDemo Version 0.1 July, 2009,
   Copyright 2009 Ken Shirriff, http://arcfn.com

   An IR LED circuit *MUST* be connected to the ESP8266 on a pin
   as specified by kIrLed below.

   TL;DR: The IR LED needs to be driven by a transistor for a good result.

   Suggested circuit:
       https://github.com/crankyoldgit/IRremoteESP8266/wiki#ir-sending

   Common mistakes & tips:
 *   * Don't just connect the IR LED directly to the pin, it won't
       have enough current to drive the IR LED effectively.
 *   * Make sure you have the IR LED polarity correct.
       See: https://learn.sparkfun.com/tutorials/polarity/diode-and-led-polarity
 *   * Typical digital camera/phones can be used to see if the IR LED is flashed.
       Replace the IR LED with a normal LED if you don't have a digital camera
       when debugging.
 *   * Avoid using the following pins unless you really know what you are doing:
 *     * Pin 0/D3: Can interfere with the boot/program mode & support circuits.
 *     * Pin 1/TX/TXD0: Any serial transmissions from the ESP8266 will interfere.
 *     * Pin 3/RX/RXD0: Any serial transmissions to the ESP8266 will interfere.
 *   * ESP-01 modules are tricky. We suggest you use a module with more GPIOs
       for your first time. e.g. ESP-12 etc.
*/
#include <M5StickCPlus.h>
#include <IRremoteESP8266.h>
#include <IRsend.h>

const uint16_t kIrLed = 9;  // 赤外LEDが接続されたピン番号

IRsend irsend(kIrLed);  // Set the GPIO to be used to sending the message.

// Example of data captured by IRrecvDumpV2.ino
uint16_t photoshot[99] = {3488, 1740,  438, 424,  438, 1302,  440, 422,  438, 424, 440, 422,  440, 422,
                          440, 422,  438, 424,  438, 424,  438, 424,  438, 424,  438, 426,  438, 424,
                          438, 1302,  440, 422,  442, 422,  440, 424,  438, 424,  438, 424,
                          442, 420,  438, 1304,  438, 1304,  440, 1302,  438, 424,  438, 424,  438, 424,
                          438, 424,  438, 1302,  440, 424,  440, 1302,  440, 422,  438, 424,  440, 422,
                          440, 1302,  438, 1304,  438, 424,  438, 424,  438, 1304,  438, 1302,  438, 424,
                          438, 424,  462, 1278,  464, 1278,  464, 1278,  462, 1280,  460, 1280,  464, 398,
                          464, 398,  438
                         };  // PANASONIC 40040E14667C

uint16_t recording[99] = {3490, 1738,  440, 424,  438, 1304,  438, 424,  438, 424,  438, 424,  438, 424,
                      438, 424,  438, 424,  438, 424,  438, 424,  438, 424,  438, 424,  438, 424,
                      438, 1302,  440, 424,  442, 422,  438, 424,  438, 424,  438, 424,  438, 424,
                      438, 1302,  442, 1302,  438, 1302,  440, 424,  440, 424,  438, 424,  438, 424,
                      438, 1302,  442, 420,  442, 1302,  438, 424,  438, 422,  442, 422,  438, 424,
                      440, 1302,  438, 1302,  438, 424,  438, 424,  438, 1302,  442, 1300,  440, 424,
                      440, 422,  440, 1302,  440, 424,  462, 1278,  464, 400,  464, 398,  464, 1278,  464
                     };  // PANASONIC 40040E143329

void setup() {
  M5.begin();
  Serial.begin(115200);
  M5.Lcd.fillScreen(BLUE);
  irsend.begin();
}

void loop() {
  //  Serial.println("NEC");  //  irsend.sendNEC(0x00FFE01FUL);
  //  Serial.println("Sony"); //  irsend.sendSony(0xa90, 12, 2);  // 12 bits & 2 repeats
  M5.update();
  if (M5.BtnA.wasReleased()) {
    irsend.sendRaw(photoshot, 99, 38);  // Send a raw data capture at 38kHz.
    M5.Lcd.fillScreen(YELLOW);
  } else if (M5.BtnB.wasReleased()) {
    irsend.sendRaw(recording, 99, 38);  // Send a raw data capture at 38kHz.
    M5.Lcd.fillScreen(RED);
  }
  delay(150);
  M5.Lcd.fillScreen(BLUE);
  //  Serial.println("a Samsung A/C state from IRrecvDumpV2");
  //  irsend.sendSamsungAC(samsungState);
  //  delay(2000);
}

気温・湿度・気圧 (ENV II Sensor)

M5Stack社ENV II Unit(U001-B) https://lang-ship.com/blog/work/m5stack-env-ii-unit-u001-b/ の、M5StickCでの使い方(GitHub) に従って、以下2つをライブラリマネージャから入れてください。(または、arduino-cli lib install "Adafruit BMP280 Library" などで。)

  • Adafruit BMP280 Library

  • Adafruit SHT31 Library

上のリンクにあったプログラムとほぼ同じですが、リスト 30 が、気温・湿度・気圧をLCDとシリアルコンソールに出力するプログラムです。(すこしだけ改変しています)

リスト 30 src/env2.ino
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/*
 Please install the < Adafruit BMP280 Library > (https://github.com/adafruit/Adafruit_BMP280_Library)
                     < Adafruit SHT31 Library > (https://github.com/adafruit/Adafruit_SHT31)
   from the library manager before use.
  This code will display the temperature, humidity and air pressure information on the screen
  https://lang-ship.com/blog/work/m5stack-env-ii-unit-u001-b/
  */
#include <M5StickCPlus.h>
#include <Adafruit_BMP280.h>
#include <Adafruit_SHT31.h>
Adafruit_SHT31 sht3x = Adafruit_SHT31(&Wire);
Adafruit_BMP280 bme = Adafruit_BMP280(&Wire);
float tmp = 0.0;
float hum = 0.0;
float pressure = 0.0;
void setup() {
  M5.begin();
  M5.Lcd.setRotation(3);
  M5.Lcd.setTextSize(3);
  Wire.begin(32, 33);
  Serial.println(F("ENV Unit(SHT30 and BMP280) test..."));
  while (!bme.begin(0x76)) {
    Serial.println("Could not find a valid BMP280 sensor, check wiring!");
    M5.Lcd.println("Could not find a valid BMP280 sensor, check wiring!");
  }
  while (!sht3x.begin(0x44)) {
    Serial.println("Could not find a valid SHT3X sensor, check wiring!");
    M5.Lcd.println("Could not find a valid SHT3X sensor, check wiring!");
  }
  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.println("ENV Unit test...");
}
void loop() {
  pressure = bme.readPressure();
  tmp = sht3x.readTemperature();
  hum = sht3x.readHumidity();
  Serial.printf("Temperature: %2.2f*C  Humidity: %0.2f%%  Pressure: %0.2fhPa\r\n", tmp, hum, pressure / 100);
  M5.Lcd.setCursor(0, 25);
  M5.Lcd.setTextColor(WHITE, BLACK);
  M5.Lcd.printf("Temp:%2.2f*C\n", tmp);
  M5.Lcd.printf("Humi:%2.2f%%\n", hum);
  M5.Lcd.printf("Prs :%2.0fhPa\n", pressure / 100);
  delay(1000);
}

警告

ENV II HAT用のプログラムではありません。ENV II HAT用のサンプル

Speaker Hatで音をだす

参考:https://nn-hokuson.hatenablog.com/entry/2017/09/01/092945

ボタンを押したときに、2種類の音を出す例を リスト 31 に示します。また、音データのサンプルを 16k.txt8k.txt におきました。 (16kも8kも、Speaker Hatで聴く分には違いはわかりませんでしたので、8kでいいとおもいます。)

リスト 31 のコメント(黄色ハイライト部分)をよく読んで、タブを追加し、16k.txt と 8k.txt の内容を貼り付けてください。

リスト 31 src/speakerhat01.ino
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#include <M5StickCPlus.h>

const int servo_pin = 26;
uint8_t ledChannel = 0;
uint8_t resolution = 8;
uint32_t sampling_rate = 16000; //16kの場合。8kの場合は、8000

/*
    別タブ(ファイル名はなんでもよい)に、音声データを以下の形式で貼っておく。
    【音1】
    const uint8_t coin05_8k_raw[] PROGMEM = { 0x80, ... };
    const uint32_t coin05_8k_raw_len = 7218; // ←配列のサイズ
    【音2】
    const uint8_t coin05_16k_raw[] PROGMEM = { 0x80, ... };
    const uint32_t coin05_16k_raw_len = 14437; // ←配列のサイズ
    PROGMEM と書くと、フラッシュメモリに配置する

    そのうえで、以下のextern文を、別タブの変数名と合わせて書く。
    変数名を一致させることが重要です。
*/
//    【音1】
extern const uint8_t coin05_8k_raw[];
extern const uint32_t coin05_8k_raw_len;
//    【音2】
extern const uint8_t coin05_16k_raw[];
extern const uint32_t coin05_16k_raw_len;

void setup() {
  // put your setup code here, to run once:
  M5.begin();
  M5.Lcd.setRotation(3);
  M5.Lcd.setCursor(0, 30, 4);
  M5.Lcd.println(" speaker hat test");
  ledcSetup(ledChannel, sampling_rate * 32, resolution);
  ledcAttachPin(servo_pin, ledChannel);
  ledcWrite(ledChannel, 0);
}
void playMusic(const uint8_t* music_data, uint32_t len, uint16_t sample_rate) {
  uint32_t delay_interval = ((uint32_t)1000000 / sample_rate);
  for (int i = 0; i < len; i++) {
    ledcWrite(ledChannel, music_data[i]);
    delayMicroseconds(delay_interval);
  }
  ledcWriteTone(ledChannel, 0);
}
void loop() {
  M5.update();
  if (M5.BtnA.wasReleased()) {
    playMusic(coin05_16k_raw, coin05_16k_raw_len, sampling_rate + 800); //なぜか音が低いので +800した
  } else if (M5.BtnB.wasReleased()) {
    playMusic(coin05_8k_raw, coin05_8k_raw_len, sampling_rate / 2); // 8kなので、2で割った
  }
  ledcWriteTone(ledChannel, 0);
  delay(100);
}

LINE Notify (HTTPS POST)

https://notify-bot.line.me/ja/ で、トークンを取得しておく必要があります。

リスト 32 src/line01.ino
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#include <WiFi.h>
#include <WiFiMulti.h>
#include <WiFiClient.h>
#include <HTTPClient.h>

WiFiMulti WiFiMulti;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP("miura_asp_2g", "********");

  // wait for WiFi connection
  Serial.print("Waiting for WiFi to connect...");
  while ((WiFiMulti.run() != WL_CONNECTED)) {
    Serial.print(".");
    delay(50);
  }
  Serial.println(" connected");
}

void loop() {
  HTTPClient http;

  if (http.begin("https://notify-api.line.me/api/notify")) {  // HTTPS
    http.addHeader("Authorization", "Bearer TOKENTOKENTOKEN"); // ここのTOKENTOKEN... の部分に、取得したTokenを指定する
    http.addHeader("Content-Type", "application/x-www-form-urlencoded"); // format of postdata
    String postdata = "message=日本語でも大丈夫です";
    int httpCode = http.POST(postdata);

    // httpCode will be negative on error
    if (httpCode > 0) {
      // HTTP header has been send and Server response header has been handled
      Serial.printf("[HTTP] GET... code: %d\n", httpCode);

      // file found at server
      if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
        String payload = http.getString();
        Serial.println(payload);
      }
    } else {
      Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
    }
    http.end();
  } else {
    Serial.printf("[HTTP] Unable to connect\n");
  }

  Serial.println();
  Serial.println("Waiting 2 minutes..."); 
  delay(60*2*1000); // 120秒まつ
}