Project Logs

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• [Rpi server] Wifi USB dongle

  TJ • 07/10/2015 at 10:05 • 0 comments

  Wifi USB dongle configuration on rpi :

  $sudo xemacs /etc/network/interfaces

  auto lo 
   
  iface lo inet loopback 
  iface eth0 inet dhcp 
   
  #allow-hotplug wlan0 
  #iface wlan0 inet manual 
  #wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf 
  #iface default inet dhcp 
   
  auto wlan0 
  allow-hotplug wlan0 
  iface wlan0 inet static 
  address 192.168.1.58 
  netmask 255.255.255.0 
  gateway 192.168.1.1 
  wpa-ssid "SSID"
  wpa-psk "PASSWORD"

  Save file with Ctrl+x, Ctrl+s

  Quit emacs: Ctrl+x, Ctrl-c

  $sudo reboot

• [Trinket sensing] Wires and first screen

  TJ • 06/17/2015 at 14:31 • 0 comments

  Trinket sensing with everything working:

  Sensors, Wifi and Screen test:

          display.println("MODE_MAIN");
          display.println(ipAddr); // ESP 01 - connected
          display.println(humiVal); // Temp & Humi Pro
          display.println(tempVal); // Temp & Humi Pro
          display.println(luxVal); // Digital light sensor
          display.println(moistureVal); // Soil moisture
          display.println(temperatureVal); // Barometer
          display.println(pressureVal); // Barometer
          display.println(atmVal); // Barometer
          display.println(altitudeVal); // Barometer

• [Rpi server] First launch

  TJ • 06/16/2015 at 12:15 • 0 comments

  I've installed the raspbian image on the sd card. https://www.raspberrypi.org/downloads/

  With Apache 2, PHPMyAdmin, MySQL (http://elinux.org/RPi_Apache2, http://elinux.org/RPi_MySQL)

  The database trinket_sensing now contains the temperature table:

  In my case the RPI IP address is 192.168.1.58 (local address)

  With the script below (insertTemp.php) I can add a value.

  <?php
  $servername = "localhost";
  $username = "root";
  $password = "password";
  $dbname = "trinket_sensing";
  
  // Create connection
  $conn = new mysqli($servername, $username, $password, $dbname);
  // Check connection
  if ($conn->connect_error) {
      die("Connection failed: " . $conn->connect_error);
  } 
  
  $sql = "INSERT INTO temperature (id, ts, value) VALUES (NULL, CURRENT_TIMESTAMP, '".$_GET['temp']."')";
  
  if ($conn->query($sql) === TRUE) {
      echo "New record created successfully";
  } else {
      echo "Error: " . $sql . "<br>" . $conn->error;
  }
  
  $conn->close();
  ?>

  I now have a working database test link. I will add all others later.

• [Trinket sensing] ESP-01

  TJ • 06/16/2015 at 10:01 • 0 comments

  Buy

  $3 ESP-01 (ESP8266) module from Price Minister

  Hardware

  Vcc	Trinket VBat pin
  Gnd	Gnd
  CH_PD	Trinket Pin 5
  RESET	Not connected
  GPIO_0	Not connected
  GPIO_2	Not Connected
  RX	Trinket Tx pin
  TX	Trinket Rx pin

  
  

  Arduino Code

  #define WIFI_CH_PD 5
  
  void setup(void)  {
    digitalWrite(WIFI_CH_PD, LOW);
    delay(500);
    digitalWrite(WIFI_CH_PD, HIGH);
    delay(2000);
    Serial.begin(115200);  
  }
  void loop(void) {
    Serial.println("AT");
    //while (!Serial.available()) {}
    while (Serial.available()) {
      char c = Serial.read();
      display.print(c);
    }
    display.println("");
    delay(2000);
  }

• [Trinket sensing] Grove barometer

  TJ • 06/08/2015 at 14:21 • 0 comments

  New Page

  [ADIOS] Grove barometer
  

• [Trinket sensing] Grove digital light sensor

  TJ • 06/08/2015 at 11:57 • 0 comments

  New Page

  [ADIOS] Grove digital light sensor
  

• [Trinket sensing] Push-buttons (using interrupts)

  TJ • 06/08/2015 at 10:27 • 0 comments

  Hardware

  PB1_SIG	Trinket Pin 11
  PB2_SIG	Trinket Pin 12

  Learn about arduino interrupts

  http://playground.arduino.cc/Main/PinChangeInterrupt

  Arduino Code

  #define BUT_RIGHT 11
  #define BUT_LEFT  12
  
  void pciSetup(byte pin)
  {
      *digitalPinToPCMSK(pin) |= bit (digitalPinToPCMSKbit(pin));  // enable pin
      PCIFR  |= bit (digitalPinToPCICRbit(pin)); // clear any outstanding interrupt
      PCICR  |= bit (digitalPinToPCICRbit(pin)); // enable interrupt for the group
  }
  
  ISR (PCINT0_vect) // handle pin change interrupt for D8 to D13 here
  {
   /* if (digitalRead(BUT_RIGHT) == LOW || digitalRead(BUT_LEFT) == LOW)
      display.refresh();*/
  }
  
  void setup(void) {
    pinMode(BUT_RIGHT, INPUT);
    pinMode(BUT_LEFT, INPUT);
  /*
    digitalWrite(BUT_RIGHT,HIGH); // set pullup - not required - hardware pullup
    digitalWrite(BUT_LEFT,HIGH); // set pullup - not required - hardware pullup
  */
    pciSetup(BUT_RIGHT);
    pciSetup(BUT_LEFT);
  }

  
  

• [Trinket sensing] SHARP Memory Display - 1.3" 96x96 Monochrome

  TJ • 06/08/2015 at 09:44 • 0 comments

  Buy

  https://www.adafruit.com/products/1393

  Learn

  https://learn.adafruit.com/adafruit-sharp-memory-display-breakout

  (Link looks down today - http://www.downforeveryoneorjustme.com/learn.adafruit.com/adafruit-sharp-memory-display-breakout)

  C++ Library

  You need the Sharp and GFX libraries from Adafruit

  https://github.com/adafruit/Adafruit_SHARP_Memory_Display
  

  https://github.com/adafruit/Adafruit-GFX-Library
  

  Hardware

  Vin	3.3 V
  Gnd	Gnd
  CLK	Trinket Pin 9
  DI	Trinket Pin 10
  CS	Trinket Pin 4

  Arduino code

  #include <SPI.h>
  #include <Adafruit_GFX.h>
  #include <Adafruit_SharpMem.h>
  
  #define BLACK 0
  #define WHITE 1
  
  // any pins can be used
  #define SHARP_CLK 9
  #define SHARP_DI  10
  #define SHARP_CS  4
  
  Adafruit_SharpMem display(SHARP_CLK, SHARP_DI, SHARP_CS);
  
  void setup(void) {
  
  }
  
  void loop(void) {
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(BLACK);
    display.setCursor(0,0);
    display.setTextColor(WHITE, BLACK); 
    display.print("It works !");
  }
  

  
  

• [Trinket sensing] Grove temperature and humidity sensor pro

  TJ • 06/05/2015 at 07:36 • 0 comments

  Buy

  http://www.seeedstudio.com/depot/grove-temperaturehumidity-sensor-pro-p-838.html

  Wiki

  http://www.seeedstudio.com/wiki/Grove_-_Temperature_and_Humidity_Sensor_Pro

  C++ Library

  https://github.com/Seeed-Studio/Grove_Temperature_And_Humidity_Sensor

  Hardware

  Vcc	3.3 V
  Gnd	Gnd
  Sig	Trinket A0 (Analog 0)

  Arduino code

  #include "DHT.h"
  
  #define DHTPIN      A0
  #define DHTTYPE   DHT22
  
  DHT tempAndHumi(DHTPIN, DHTTYPE);
  
  void loop(void) {
  
  }
  
  void setup(void)  {
    float humiVal = tempAndHumi.readHumidity();
    float tempVal = tempAndHumi.readTemperature();
  }

• [Trinket sensing] Grove moisture sensor

  TJ • 06/05/2015 at 07:31 • 0 comments

  Buy

  http://www.seeedstudio.com/depot/Grove-Moisture-Sensor-p-955.html

  Wiki

  http://www.seeedstudio.com/wiki/Grove_-_Moisture_Sensor
  

  Hardware

  Vcc	3.3 V
  Gnd	Gnd
  Sig	Trinket A1 (Analog 1)

  Arduino code

  #define PIN_MOISTURE A1
  
  void setup(void)  {
    pinMode(PIN_MOISTURE, INPUT);
  }
  
  void loop(void)  {
   int moistureVal = analogRead(PIN_MOISTURE);
  }

  
  

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