shake.ino

#include <Wire.h>
#include <SPI.h>
#include <SparkFunLSM9DS1.h>

LSM9DS1 imu;
#define LSM9DS1_M 0x1E // Would be 0x1C if SDO_M is LOW
#define LSM9DS1_AG  0x6B // Would be 0x6A if SDO_AG is LOW
#define PRINT_SPEED 250 // 250 ms between prints

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>

const char* ssid          = "******";
const char* wifi_password = "******";
const char* mqtt_server   = "******";
const int   port          = ******;
const char* username      = "******";
const char* password      = "******";

WiFiClient espClient;
PubSubClient client(espClient);


void setup() 
{
  Serial.begin(115200);
  setupWifi();
  client.setServer(mqtt_server, port); 
  imu.settings.device.commInterface = IMU_MODE_I2C;
  if (!imu.begin())
  {
    Serial.println("Failed to communicate with LSM9DS1.");
    while (1)
      ;
  }
}

void loop()
{
  if (getGyroZ() > 120.0  || getGyroZ() < -120.0) {
    if (!client.connected()) {
      reconnect();
    }
    client.loop();
    client.publish("key", "shake!");
    Serial.print("shake!");
    delay(1000);
  }
  delay(100);
}

double getGyroZ()
{
  imu.readGyro();
  return imu.calcGyro(imu.gz);
}

void setupWifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, wifi_password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("1-go-ki", username, password)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}