ADXL335 Triple Axis Accelerometer
Project #11: ESP32 Feather – ADXL335 – Mk08
ESP32 Feather – ADXL335
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ADXL335 Triple Axis Accelerometer
Breakout board for the 3 axis ADXL335 from Analog Devices. This is the latest in a long, proven line of analog sensors – the holy grail of accelerometers. The ADXL335 is a triple axis MEMS accelerometer with extremely low noise and power consumption – only 320uA! The sensor has a full sensing range of +/-3g.
DonLuc1909Mk05
1 x Adafruit HUZZAH32 ESP32 Feather
1 x Adafruit SHARP Memory Display
1 x Adafruit Adalogger FeatherWing – RTC + SD
1 x CR1220 12mm Lithium Battery
1 x 8Gb Micro SD Card
1 x RHT03 Humidity and Temperature Sensor
1 x GPS Receiver GP-20U
1 x ADXL335 Triple Axis Accelerometer
1 x LED Green
1 x Rocker Switches
1 x 100 Ohm
1 x 10K Ohm
14 x Jumper Wires 3″ M/M
6 x Jumper Wires 6″ M/M
5 x Wire
1 x Full-Size Breadboard
1 x Breadboard
1 x SparkFun Cerberus USB Cable
Adafruit HUZZAH32 ESP32 Feather
LG1 – Digital 21
RO1 – Digital 16
RHT – Digital 17
SCK – Digital 13
MOS – Digital 12
SSD – Digital 27
SDA – Digital 23
SCL – Digital 22
SD1 – Digital 33
SC2 – Digital 5
MO2 – Digital 18
MI2 – Digital 19
GPS – Digital 4
ACX – Analog A8
ACY – Analog A7
ACZ – Analog A6
GND – GND
VIN – +3.3V
DL1909Mk05.ino
// ***** Don Luc Electronics *****
// Software Version Information
// Project #11: HUZZAH32 ESP32 Feather - ADXL335 - Mk08
// 09-05
// DL1909Mk05p.ino 11-08
// Adafruit HUZZAH32 ESP32 Feather Board
// SHARP Display
// LED Green
// Adalogger FeatherWing - RTC + SD
// EEPROM
// RHT03 Humidity and Temperature Sensor
// Rocker Switches
// GPS Receiver
// ADXL335 Triple Axis Accelerometer
// include Library Code
// SHARP Memory Display
#include <Adafruit_SharpMem.h>
#include <Adafruit_GFX.h>
// Date and Time
#include "RTClib.h"
// EEPROM library to read EEPROM with unique ID for unit
#include "EEPROM.h"
// RHT Humidity and Temperature Sensor
#include <SparkFun_RHT03.h>
// SD Card
#include "FS.h"
#include "SD.h"
#include "SPI.h"
// GPS Receiver
#include <TinyGPS++.h>
#include <HardwareSerial.h>
// ADXL335 Triple Axis Accelerometer
#include <ADXL335.h>
// SHARP Memory Display
// any pins can be used
#define SHARP_SCK 13
#define SHARP_MOSI 12
#define SHARP_SS 27
// Set the size of the display here, e.g. 144x168!
Adafruit_SharpMem display(SHARP_SCK, SHARP_MOSI, SHARP_SS, 144, 168);
// The currently-available SHARP Memory Display (144x168 pixels)
// requires > 4K of microcontroller RAM; it WILL NOT WORK on Arduino Uno
// or other <4K "classic" devices!
#define BLACK 0
#define WHITE 1
int minorHalfSize; // 1/2 of lesser of display width or height
// LED Green
int iLEDGreen = 21; // LED Green
// PCF8523 Precision RTC
RTC_PCF8523 rtc;
String dateRTC = "";
String timeRTC = "";
// RHT Humidity and Temperature Sensor
const int RHT03_DATA_PIN = 17; // RHT03 data pin Digital 17
RHT03 rht; // This creates a RTH03 object, which we'll use to interact with the sensor
float latestHumidity;
float latestTempC;
float latestTempF;
// SD Card
const int chipSelect = 33; // SD Card
String zzzzzz = "";
// Rocker Switches
int iRow1 = 16; // Rocker Switches Digital 16
int iRow1State = 0; // Variable for reading the pushbutton status
// ESP32 HardwareSerial
HardwareSerial tGPS(2);
// GPS Receiver
#define gpsRXPIN 4
#define gpsTXPIN 36 // This one is unused and doesnt have a conection
// The TinyGPS++ object
TinyGPSPlus gps;
float TargetLat;
float TargetLon;
int Status = 0;
// ADXL335 Triple Axis Accelerometer
const int pin_x = A8;
const int pin_y = A7;
const int pin_z = A6;
const float aref = 3.3;
ADXL335 accel(pin_x, pin_y, pin_z, aref);
String latestX = "";
String latestY = "";
String latestZ = "";
// The current address in the EEPROM (i.e. which byte
// we're going to read to next)
#define EEPROM_SIZE 64
String sver = "9-5.p";
// Unit ID information
String uid = "";
void loop() {
// Receives NEMA data from GPS receiver
// This sketch displays information every time a new sentence is correctly encoded.
while ( tGPS.available() > 0)
if (gps.encode( tGPS.read() ))
{
displayInfo();
}
if (millis() > 5000 && gps.charsProcessed() < 10)
{
while(true);
}
// Date and Time
isRTC();
// RHT03 Humidity and Temperature Sensor
isRHT03();
// SHARP Memory Display On
isDisplayOn();
// Rocker Switched
// Read the state of the iRow1 value
iRow1State = digitalRead(iRow1);
// ADXL335 Triple Axis Accelerometer
getADXL335();
// Check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (iRow1State == HIGH) {
// iLEDGreen
digitalWrite(iLEDGreen, HIGH );
// SD Card
isSD();
} else {
// iLEDGreen
digitalWrite(iLEDGreen, LOW );
}
// Delay
delay( 1000 );
}
getADXL335.ino
// ADXL335 Triple Axis Accelerometer
void getADXL335()
{
// This is required to update the values
accel.update();
// This tells us how long the string is
int string_width;
float x;
float y;
float z;
x = accel.getX();
y = accel.getY();
// If the project is laying flat and top up the z axis reads ~1G
z = accel.getZ();
latestX = formatFloat(x, 2, &string_width);
latestY = formatFloat(y, 2, &string_width);
latestZ = formatFloat(z, 2, &string_width);
}
// Format float library
String formatFloat(double value, int places, int* string_width)
{
// If value is positive infinity
if (isinf(value) > 0)
{
return "+Inf";
}
// Arduino does not seem to have negative infinity
// keeping this code block for reference
// if value is negative infinity
if(isinf(value) < 0)
{
return "-Inf";
}
// If value is not a number
if(isnan(value) > 0)
{
return "NaN";
}
// Always include a space for the dot
int num_width = 1;
// If the number of decimal places is less than 1
if (places < 1)
{
// Set places to 1
places = 1;
// And truncate the value
value = (float)((int)value);
}
// Add the places to the right of the decimal
num_width += places;
// If the value does not contain an integral part
if (value < 1.0 && value > -1.0)
{
// Add one for the integral zero
num_width++;
}
else
{
// Get the integral part and get the number of places to the left of decimal
num_width += ((int)log10(abs(value))) + 1;
}
// If the value in less than 0
if (value < 0.0)
{
// Add a space for the minus sign
num_width++;
}
// Make a string the size of the number plus 1 for string terminator
char s[num_width + 1];
// Put the string terminator at the end
s[num_width] = '\0';
// Initalize the array to all zeros
for (int i = 0; i < num_width; i++)
{
s[i] = '0';
}
// Characters that are not changed by the function below will be zeros
// set the out variable string width lets the caller know what we came up with
*string_width = num_width;
// Use the avr-libc function dtosrtf to format the value
return String(dtostrf(value,num_width,places,s));
}
getDisplay.ino
// SHARP Memory Display On
void isDisplayOn() {
// Clear Display
display.clearDisplay();
// text display date, time, LED on
display.setRotation(4);
display.setTextSize(2);
display.setTextColor(BLACK);
display.setCursor(0,1);
display.println( dateRTC );
display.setCursor(0,17);
display.println( timeRTC );
//display.setTextSize(2);
display.setCursor(0,35);
display.print("Lon: ");
display.println( TargetLon );
display.setCursor(0,55);
display.print("Lat: ");
display.println( TargetLat );
display.setCursor(0,74);
display.print("Hum: ");
display.print( latestHumidity );
display.println("%");
display.setCursor(0,94);
display.print("Cel: ");
display.print( latestTempC );
display.println("*C");
display.setCursor(0,114);
display.print("X: ");
display.println( latestX );
display.setCursor(0,134);
display.print("Y: ");
display.println( latestY );
display.setCursor(0,154);
display.print("Z: ");
display.println( latestZ );
display.refresh();
}
// SHARP Memory Display - UID
void isDisplayUID() {
// text display EEPROM
display.setRotation(4);
display.setTextSize(2);
display.setTextColor(BLACK);
display.setCursor(0,20);
display.print( "UID: " );
display.println( uid );
// display.setTextSize();
display.setTextColor(BLACK);
display.setCursor(0,45);
display.print( "VER: ");
display.println( sver );
display.refresh();
delay( 100 );
}
getEEPROM.ino
// EEPROM
void GetUID()
{
// Get unit ID
uid = "";
for (int x = 0; x < 5; x++)
{
uid = uid + char(EEPROM.read(x));
}
}
getGPS.ino
// GPS Receiver
void setupGPS() {
// Setup GPS
tGPS.begin( 9600 , SERIAL_8N1, gpsRXPIN, gpsTXPIN );
}
// GPS Vector Pointer Target
void displayInfo()
{
// Location
if (gps.location.isValid())
{
TargetLat = gps.location.lat();
TargetLon = gps.location.lng();
Status = 2;
}
else
{
Status = 0;
}
}
getRHT.ino
// RHT03 Humidity and Temperature Sensor
void isRHT03(){
// Call rht.update() to get new humidity and temperature values from the sensor.
int updateRet = rht.update();
// The humidity(), tempC(), and tempF() functions can be called -- after
// a successful update() -- to get the last humidity and temperature value
latestHumidity = rht.humidity();
latestTempC = rht.tempC();
latestTempF = rht.tempF();
}
getRTCpcf8523.ino
// PCF8523 Precision RTC
void setupRTC() {
// pcf8523 Precision RTC
if (! rtc.begin()) {
while (1);
}
if (! rtc.initialized()) {
// Following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2018, 9, 29, 12, 17, 0));
}
}
// Date and Time RTC
void isRTC () {
// Date and Time
DateTime now = rtc.now();
// Date
dateRTC = now.year(), DEC;
dateRTC = dateRTC + "/";
dateRTC = dateRTC + now.month(), DEC;
dateRTC = dateRTC + "/";
dateRTC = dateRTC + now.day(), DEC;
// Time
timeRTC = now.hour(), DEC;
timeRTC = timeRTC + ":";
timeRTC = timeRTC + now.minute(), DEC;
timeRTC = timeRTC + ":";
timeRTC = timeRTC + now.second(), DEC;
}
getSD.ino
// SD Card
void setupSD() {
// SD Card
pinMode( chipSelect , OUTPUT );
if(!SD.begin( chipSelect )){
;
return;
}
uint8_t cardType = SD.cardType();
if(cardType == CARD_NONE){
;
return;
}
//Serial.print("SD Card Type: ");
if(cardType == CARD_MMC){
;
} else if(cardType == CARD_SD){
;
} else if(cardType == CARD_SDHC){
;
} else {
;
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
}
// SD Card
void isSD() {
zzzzzz = "";
zzzzzz = uid + "|" + sver + "|" + dateRTC + "|" + timeRTC + "|" + Status + "|" + TargetLon + "|" + TargetLat + "|" + latestHumidity + "|" + latestTempC + "|" + latestTempF + "|" + latestX + "|" + latestY + "|" + latestZ + "|\r";
char msg[zzzzzz.length() + 1];
zzzzzz.toCharArray(msg, zzzzzz.length() + 1);
appendFile(SD, "/espdata.txt", msg );
}
// List Dir
void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
dirname;
File root = fs.open(dirname);
if(!root){
return;
}
if(!root.isDirectory()){
return;
}
File file = root.openNextFile();
while(file){
if(file.isDirectory()){
file.name();
if(levels){
listDir(fs, file.name(), levels -1);
}
} else {
file.name();
file.size();
}
file = root.openNextFile();
}
}
// Write File
void writeFile(fs::FS &fs, const char * path, const char * message){
path;
File file = fs.open(path, FILE_WRITE);
if(!file){
return;
}
if(file.print(message)){
;
} else {
;
}
file.close();
}
// Append File
void appendFile(fs::FS &fs, const char * path, const char * message){
//Serial.printf("Appending to file: %s\n", path);
path;
File file = fs.open(path, FILE_APPEND);
if(!file){
return;
}
if(file.print(message)){
;
} else {
;
}
file.close();
}
setup.ino
// Setup
void setup() {
// EEPROM with unique ID
EEPROM.begin(EEPROM_SIZE);
// Get Unit ID
GetUID();
// GPS Receiver
// Setup GPS
setupGPS();
// SHARP Display start & clear the display
display.begin();
display.clearDisplay();
isDisplayUID();
delay( 5000 );
// Initialize the LED Green
pinMode(iLEDGreen, OUTPUT);
// PCF8523 Precision RTC
setupRTC();
// Date and Time RTC
isRTC();
// RHT03 Humidity and Temperature Sensor
// Call rht.begin() to initialize the sensor and our data pin
rht.begin(RHT03_DATA_PIN);
// SD Card
setupSD();
// Rocker Switches
pinMode(iRow1, INPUT);
}
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