can I have arduino board technical specification to use it?

[kongaraju]

I am new to hardware, I want to use this project. so I want to buy hardware , please provide me technical specification of Raspberry pi and arduino board.

links will be more helpful

Thanks in advance.

[bkiss]

Hi,

I use Raspberry pi model B,

http://cpcireland.farnell.com/jsp/search/productdetail.jsp?sku=SC12590

with Arduino Uno

http://arduino.cc/en/Main/arduinoBoardUno

and Relay Shield on the top of Arduino:

http://www.seeedstudio.com/wiki/Relay_Shield_V2.0

If you want to get temperature or humidity sensors, i recommend some digital sensors, I use DHT22, but you need to modify the arduino's software.

Best wishes, Barni

[kongaraju]

Thanks Barni,

please provide some more sensors information.

[ni-c]

Hi,

you can find some sensor examples on the Arduino page of the project:

http://ni-c.github.io/heimcontrol.js/plugins/arduino.html

Regards, ni-c

[bkiss]

Kongaraju:

if you want to use DHT22 or DHT11 sensors i will post here the arduino code i use, no problem.

Barni

[cdizzel]

I would really like to see the DHT22 code you use, Im having a few issues. Thanks.

[CarlosCondor]

@cdizzel http://learn.adafruit.com/dht/using-a-dhtxx-sensor

[bkiss]

Huh,

Everything went fine, until the arduino and duino library from raspberry(i think) crashed (?).

Here are the circumstances: i will post here one image showing my problem regarding the DHT22 readings.

I will paste below the arduino code, made from duino and example from the dht22.

---

include

include

define DHTTYPE DHT22

define DHTPIN 2

define DHT2PIN 3

DHT dht(DHTPIN, DHTTYPE); DHT dht2(DHT2PIN, DHTTYPE);

bool debug = true;

int index = 0;

char messageBuffer[12]; char cmd[3]; char pin[3]; char val[4]; char aux[4];

Servo servo;

void setup() { Serial.begin(115200); dht.begin(); dht2.begin(); }

void loop() { while(Serial.available() > 0) { char x = Serial.read(); if (x == '!') index = 0; // start else if (x == '.') process(); // end else messageBuffer[index++] = x; } }

/*

• Deal with a full message and determine function to call */ void process() { index = 0;

  strncpy(cmd, messageBuffer, 2); cmd[2] = '\0'; strncpy(pin, messageBuffer + 2, 2); pin[2] = '\0';

  if (atoi(cmd) > 90) { strncpy(val, messageBuffer + 4, 2); val[2] = '\0'; strncpy(aux, messageBuffer + 6, 3); aux[3] = '\0'; } else { strncpy(val, messageBuffer + 4, 3); val[3] = '\0'; strncpy(aux, messageBuffer + 7, 3); aux[3] = '\0'; }

  if (debug) { Serial.println(messageBuffer); } int cmdid = atoi(cmd);

  // Serial.println(cmd); // Serial.println(pin); // Serial.println(val); // Serial.println(aux);

  switch(cmdid) { case 0: sm(pin,val); break; case 1: dw(pin,val); break; case 2: dr(pin,val); break; case 3: aw(pin,val); break; case 4: ar(pin,val); break; case 97: handlePing(pin,val,aux); break; case 98: handleServo(pin,val,aux); break; case 99: toggleDebug(val); break; default: break; } }

/*

• Toggle debug mode / void toggleDebug(char val) { if (atoi(val) == 0) { debug = false; Serial.println("goodbye"); } else { debug = true; Serial.println("hello"); } }

/*

• Set pin mode / void sm(char pin, char *val) { if (debug) Serial.println("sm"); int p = getPin(pin); if(p == -1) { if(debug) Serial.println("badpin"); return; } if (atoi(val) == 0) { pinMode(p, OUTPUT); } else { pinMode(p, INPUT); } }

/*

• Digital write / void dw(char pin, char *val) { if (debug) Serial.println("dw"); int p = getPin(pin); if(p == -1) { if(debug) Serial.println("badpin"); return; } pinMode(p, OUTPUT); if (atoi(val) == 0) { digitalWrite(p, LOW); } else { digitalWrite(p, HIGH); } }

/*

• Digital read / void dr(char pin, char *val) { if (debug) Serial.println("dr"); int p = getPin(pin); if(p == -1) { if(debug) Serial.println("badpin"); return; } pinMode(p, INPUT); int oraw = digitalRead(p); char m[7]; sprintf(m, "%02d::%02d", p,oraw); Serial.println(m); }

/*

• Analog read _/ void ar(char pin, char val) { if(debug) Serial.println("ar"); int p = getPin(pin); if(p == -1) { if(debug) Serial.println("badpin"); return; } pinMode(p, INPUT); // don't want to sw if (p == 14) { delay(250); float hval = dht2.readHumidity()_10; float tval = dht2.readTemperature()*10; delay(250); int hval1 = hval; int tval1 = tval; char n[8]; char m[8]; sprintf(m, "%s::%03d", pin, hval1);

  sprintf(n, "A1::%03d", tval1);
  Serial.println(m);
  delay(250);
  Serial.println(n);

  // Serial.println(hval); //Serial.println(tval); delay(250);

  }

  if (p == 16) {

  float hval = dht2.readHumidity()*10;
  float tval = dht2.readTemperature()*10;
  int hval1 = hval;
  int tval1 = tval;
  char n[8];
  char m[8];

  sprintf(m, "%s::%03d", pin, hval1); sprintf(n, "A3::%03d", tval1); //Serial.println(m); Serial.println(hval); Serial.println(tval);

  //Serial.println(n);

  }

}

void aw(char pin, char val) { if(debug) Serial.println("aw"); int p = getPin(pin); pinMode(p, OUTPUT); if(p == -1) { if(debug) Serial.println("badpin"); return; } analogWrite(p,atoi(val)); }

int getPin(char *pin) { //Converts to A0-A5, and returns -1 on error int ret = -1; if(pin[0] == 'A' || pin[0] == 'a') { switch(pin[1]) { case '0': ret = A0; break; case '1': ret = A1; break; case '2': ret = A2; break; case '3': ret = A3; break; case '4': ret = A4; break; case '5': ret = A5; break; default: break; } } else { ret = atoi(pin); if(ret == 0 && (pin[0] != '0' || pin[1] != '0')) { ret = -1; } } return ret; }

/*

• Handle Ping commands

• fire, read / void handlePing(char pin, char val, char aux) { if (debug) Serial.println("ss"); int p = getPin(pin);

  if(p == -1) { if(debug) Serial.println("badpin"); return; } Serial.println("got signal");

  // 01(1) Fire and Read if (atoi(val) == 1) { char m[16];

  pinMode(p, OUTPUT); digitalWrite(p, LOW); delayMicroseconds(2); digitalWrite(p, HIGH); delayMicroseconds(5); digitalWrite(p, LOW);

  Serial.println("ping fired");

  pinMode(p, INPUT); sprintf(m, "%s::read::%08d", pin, pulseIn(p, HIGH)); Serial.println(m);

  delay(50); } }

/*

• Handle Servo commands

• attach, detach, write, read, writeMicroseconds, attached / void handleServo(char pin, char val, char aux) { if (debug) Serial.println("ss"); int p = getPin(pin); if(p == -1) { if(debug) Serial.println("badpin"); return; } Serial.println("signal: servo");

  // 00(0) Detach if (atoi(val) == 0) { servo.detach(); char m[12]; sprintf(m, "%s::detached", pin); Serial.println(m);

  // 01(1) Attach } else if (atoi(val) == 1) { // servo.attach(p, 750, 2250); servo.attach(p); char m[12]; sprintf(m, "%s::attached", pin); Serial.println(m);

  // 02(2) Write } else if (atoi(val) == 2) { Serial.println("writing to servo"); Serial.println(atoi(aux)); // Write to servo servo.write(atoi(aux)); delay(15);

  // TODO: Experiment with microsecond pulses // digitalWrite(pin, HIGH); // start the pulse // delayMicroseconds(pulseWidth); // pulse width // digitalWrite(pin, LOW); // stop the pulse

  // 03(3) Read } else if (atoi(val) == 3) { Serial.println("reading servo"); int sval = servo.read(); char m[13]; sprintf(m, "%s::read::%03d", pin, sval); Serial.println(m); } }

---

The main idea is to set on the web interface arduino sensor A0 A1 A2 A3 , and on the arduino i have 2 dht22 sensors.

For one month everything goes well, but now i have many errors on reading, like you see on the picture. Maybe some sync problem, but i'm not shure yet.

I have tryed to solve this:

1. Changed the code on the arduino, and use the original duino code, and set debug to true, to see the communication --- without success
2. Clean install raspbian, recompile node, mongo, etc. so fresh install on another sdcard ---- same problem ----without success
3. Removed every sensor on arduino --- no success
4. Changed the usb cable, power supplyes ---- no success
5. as diagnostic run example js code from duino library --- with success --- readings are OK

---

but something is wrong. :(

Barni

[cdizzel]

Thanks for the help, its much appreciated