NodeMCU ADXL345
Updated: Dec 6, 2021
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
#include <ESP8266WiFi.h> //The library we will use for the wifi connection
#include <PubSubClient.h> // The library we will use for the mqtt connection
//mqtt connection library settings
WiFiClient espClient;
PubSubClient client(espClient);
//
//settings for internet and mqtt connection
const char* ssid = ""; // wifi SSID
const char* password = ""; // wifi password
const char* mqttServer = ""; // mqtt server ip to be sent by smartespiot by mail
const int mqttPort = ; // mqtt port to be sent by smartespiot by mail
const char* mqttUser = ""; // mqtt username to be sent by smartespiot by mail
const char* mqttPassword = ""; // mqtt pass to be sent by smartespiot by mail
//
/* Assign a unique ID to this sensor at the same time */
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);
void displaySensorDetails(void)
{
sensor_t sensor;
accel.getSensor(&sensor);
Serial.println("------------------------------------");
Serial.print ("Sensor: "); Serial.println(sensor.name);
Serial.print ("Driver Ver: "); Serial.println(sensor.version);
Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println(" m/s^2");
Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println(" m/s^2");
Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println(" m/s^2");
Serial.println("------------------------------------");
Serial.println("");
delay(500);
}
void displayDataRate(void)
{
Serial.print ("Data Rate: ");
switch (accel.getDataRate())
{
case ADXL345_DATARATE_3200_HZ:
Serial.print ("3200 ");
break;
case ADXL345_DATARATE_1600_HZ:
Serial.print ("1600 ");
break;
case ADXL345_DATARATE_800_HZ:
Serial.print ("800 ");
break;
case ADXL345_DATARATE_400_HZ:
Serial.print ("400 ");
break;
case ADXL345_DATARATE_200_HZ:
Serial.print ("200 ");
break;
case ADXL345_DATARATE_100_HZ:
Serial.print ("100 ");
break;
case ADXL345_DATARATE_50_HZ:
Serial.print ("50 ");
break;
case ADXL345_DATARATE_25_HZ:
Serial.print ("25 ");
break;
case ADXL345_DATARATE_12_5_HZ:
Serial.print ("12.5 ");
break;
case ADXL345_DATARATE_6_25HZ:
Serial.print ("6.25 ");
break;
case ADXL345_DATARATE_3_13_HZ:
Serial.print ("3.13 ");
break;
case ADXL345_DATARATE_1_56_HZ:
Serial.print ("1.56 ");
break;
case ADXL345_DATARATE_0_78_HZ:
Serial.print ("0.78 ");
break;
case ADXL345_DATARATE_0_39_HZ:
Serial.print ("0.39 ");
break;
case ADXL345_DATARATE_0_20_HZ:
Serial.print ("0.20 ");
break;
case ADXL345_DATARATE_0_10_HZ:
Serial.print ("0.10 ");
break;
default:
Serial.print ("???? ");
break;
}
Serial.println(" Hz");
}
void displayRange(void)
{
Serial.print ("Range: +/- ");
switch (accel.getRange())
{
case ADXL345_RANGE_16_G:
Serial.print ("16 ");
break;
case ADXL345_RANGE_8_G:
Serial.print ("8 ");
break;
case ADXL345_RANGE_4_G:
Serial.print ("4 ");
break;
case ADXL345_RANGE_2_G:
Serial.print ("2 ");
break;
default:
Serial.print ("?? ");
break;
}
Serial.println(" g");
}
void setup(void)
{
Wire.begin(14, 12);
Serial.begin(9600);
Serial.println("Accelerometer Test"); Serial.println("");
/* Initialise the sensor */
if (!accel.begin())
{
/* There was a problem detecting the ADXL345 ... check your connections */
Serial.println("Ooops, no ADXL345 detected ... Check your wiring!");
while (1);
}
/* Set the range to whatever is appropriate for your project */
accel.setRange(ADXL345_RANGE_16_G);
// accel.setRange(ADXL345_RANGE_8_G);
// accel.setRange(ADXL345_RANGE_4_G);
// accel.setRange(ADXL345_RANGE_2_G);
/* Display some basic information on this sensor */
displaySensorDetails();
/* Display additional settings (outside the scope of sensor_t) */
displayDataRate();
displayRange();
Serial.println("");
WiFi.begin(ssid, password); // start the wifi connection process
while (WiFi.status() != WL_CONNECTED) { //
delay(500); //wait 500ms
Serial.println("Connecting to wifi..."); // wait until the wifi process connects
}
Serial.println("Wifi connection ready :)"); // print the connection made information to the serial port
client.setServer(mqttServer, mqttPort);//start connecting to the mqtt server from the specified port
while (!client.connected()) { //wait until we connect to mqtt
Serial.println("Connecting to MQTT server...");
if (client.connect("SmartEspIOT", mqttUser, mqttPassword )) {//login to mqtt server with username and password with smartespIOT name
Serial.println("MQTT connection established :) ");
} else {
Serial.print("Unable to connect... ");// If the connection cannot be established, let's give a warning
Serial.print(client.state()); // print the problem description
// We can understand the problem according to the information returned from the clients state.
//-4 : MQTT_CONNECTION_TIMEOUT - the server did not respond in the ongoing time
//-3 : MQTT_CONNECTION_LOST - network connection lost
//-2 : MQTT_CONNECT_FAILED - network connection failed
//-1 : MQTT_DISCONNECTED - disconnected
//0 : MQTT_CONNECTED - connection established
//1 : MQTT_CONNECT_BAD_PROTOCOL - The server does not support the requested MQTT version
//2 : MQTT_CONNECT_BAD_CLIENT_ID - The server did not accept your information
//3 : MQTT_CONNECT_UNAVAILABLE - The server did not accept the connectionetmed
//4 : MQTT_CONNECT_BAD_CREDENTIALS - username password not accepted
//5 : MQTT_CONNECT_UNAUTHORIZED - you are not authorized to connect
delay(2000); // wait two seconds and try connecting again
}
}
}
void loop(void)
{
/* Get a new sensor event */
sensors_event_t event;
accel.getEvent(&event);
/* Display the results (acceleration is measured in m/s^2) */
Serial.print("X: "); Serial.print(event.acceleration.x); Serial.print(" ");
Serial.print("Y: "); Serial.print(event.acceleration.y); Serial.print(" ");
Serial.print("Z: "); Serial.print(event.acceleration.z); Serial.print(" "); Serial.println("m/s^2 ");
client.publish("devicename/xacc", String(event.acceleration.x).c_str());// send xacc
client.publish("devicename/yacc", String(event.acceleration.y).c_str());// send yacc
client.publish("devicename/zacc", String(event.acceleration.z).c_str());// send yacc
delay(2000); // wait two seconds and send the message again
}adxl345_smartespiot_web2
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