Dupa ce m-am tot "jucat" cu minipagini web tip server, cu stil classic si Ajax, am decis sa incerc si folosirea paginii ThingSpeak, care ofera prezentare grafica a unor date si, mai ales, stocare date, care pot fi ulterior prelucrate.
Prima incercare am facut-o folosindu-ma de o placa Arduino Mega cu placa de retea tip shield (Ethernet shield cu W5100) la care am conectat un sensor AM2302 (DHT22):
Sketch-ul folosit se gaseste pe GitHub fiind cel numit ThingSpeak_DHT22_ver1a.ino, in care trebuie sa puneti Write API Key-ul canalului pe care il postati:
Pe canalul ThingSpeak cu 2 valori, cum este facut si sketch-ul, la setari avem:
19.12.2015 Deoarece am avut surpriza neplacuta ca la reincarcarea sketch-ului de pe versiunea Arduino IDE 1.6.5 sa pot trimite date abia la 7 minute (in ecranul serial comenzile se trimiteau litera cu litera), nu la 20 secunde ca de obicei, am modificat sketch-ul pentru versiuni mai stabile (1.0.3..1.0.5), acest sketch fiind ThingSpeak_DHT22_ver1a_ide10.ino .
Am zis sa continui testele pentru comanda unui led conectat la placa de retea pe care le-am prezentat in articolul precedent, de data asta sa am control din afara retelei. Furnizorul de internet, in cazul meu RCS&RDS, are un servicu de alocare a unui nume contului de acasa. Eu am ales numele de tehniq.go.ro:
Alt pas care l-am facut este acela de a deschde un port, ales de mine ca 8081:
La tastarea pentru prima data a adresei tehniq.go.ro:8081 pe ecranul calculatorului, a tabletei sau telefonului mobil vom avea urmatoarea imagine:
Daca se apasa butonul virtual Turn on LED pe ecran va aparea situatia:
si led-ul verde se va aprinde.
Daca se apasa butonul virtual Turn off LED pe ecran va aparea situatia:
iar led-ul verde se va stinge.
21.02.2015
Am mai modificat sketch-ul in functie de observatiile celor care au testat pagina si am afisata temperatura microcontrolului ATmega328 pe pagina, am afisat numarul de aprinderi ale led-ului, am eliminat problemea cresterii nereale prin comanda de "refresh" sau apasare repeatata pe "on", se stocheaza in memoria EEPROM a microcontrolerului numarul de aprinderi si starea anteriora, pentru a nu se sterge datele la un restart sau pana de curent...
- led verde aprins:
- led verde stins:
Am facut, in sfarsit, si un filmulet numit LED controlat prin internet in care se vede modul de control si ce cum reactioneaza montajul prin comanda de pe un telefon conectat la internet:
Sketch-ul folosit de mine, ajuns la versiunea 3f3, este:
/* Created by Rui Santos Visit: http://randomnerdtutorials.com for more arduino projects Modified by Nicu Florica aka niq_ro visit http://nicuflorica.blogspot.ro/ or http://arduinotehniq.blogspot.com or http://www.tehnic.go.ro Arduino with Ethernet Shield */
#include <SPI.h>
#include <Ethernet.h>
int led = 9;
int pos = 0;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac addressbyte ip[] = { 192, 168, 2, 178 }; // ip in lan (that's what you need to use in your browser. ("192.168.1.178")byte gateway[] = { 192, 168, 2, 1 }; // internet access via routerbyte subnet[] = { 255, 255, 255, 0 }; //subnet maskEthernetServer server(8081); //server port String readString;
int clic; // number of mouse clicksint clic1; // number of recovered mouse clicksbyte stare; // 0 is OFF, 1 is ONbyte stare0; // before stateint a = 0; // decinal valueint b = 0; // unitar valueint a1 = 0; // recovered decimal valueint b1 = 0; // recovered unitar value// http://tronixstuff.com/2011/03/16/tutorial-your-arduinos-inbuilt-eeprom/
#include <EEPROM.h>
voidsetup() {
// Open serial communications and wait for port to open:Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
pinMode(led, OUTPUT);
digitalWrite(led, LOW);
// start the Ethernet connection and the server:Ethernet.begin(mac, ip, gateway, subnet);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
a1 = EEPROM.read(100);
b1 = EEPROM.read(101);
// recover number of mouse click
clic = a1*256 + b1;
stare0 = EEPROM.read(102);
}
voidloop() {
// Create a client connectionEthernetClient client = server.available();
if (client) {
while (client.connected()) {
if (client.available()) {
char c = client.read();
//read char by char HTTP requestif (readString.length() < 100) {
//store characters to string
readString += c;
//Serial.print(c);
}
//if HTTP request has endedif (c == '\n') {
Serial.println(readString); //print to serial monitor for debuging
client.println("HTTP/1.1 200 OK"); //send new page
client.println("Content-Type: text/html");
client.println();
client.println("<HTML>");
// add a meta refresh tag, so the browser pulls again every 10 seconds:
client.println("<meta http-equiv=\"refresh\" content=\"10\">");
client.println("<HEAD>");
client.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
client.println("<link rel='stylesheet' type='text/css' href='http://randomnerdtutorials.com/ethernetcss.css' />");
client.println("<TITLE>Arduino with Ethernet Shield</TITLE>");
client.println("</HEAD>");
client.println("<BODY>");
client.println("<H2>tehniq.go.ro by niq_ro</H1>");
client.println("<hr />");
// client.println("<br />");
client.println("<H1>Arduino with Ethernet Shield</H2>");
client.println("<br />");
client.println("<a href=\"/?button1on\"\">Turn On LED</a>");
client.println("<a href=\"/?button1off\"\">Turn Off LED</a><br />");
client.println("<br />");
// client.println("<br />");
client.println("<H2>");
if (readString.indexOf("?button1on") >0){
stare = 1;
// client.print("<p>LED is ON</p>");// digitalWrite(led, HIGH);// clic = clic + 1;
}
if (readString.indexOf("?button1off") >0){
stare = 0;
//client.print("<p>LED is OFF</p>");//digitalWrite(led, LOW);// clic = clic + 1;
}
// read old state:
stare0 == EEPROM.read(102);
if (stare == 1) {
client.print("<p>LED is ON</p>");
digitalWrite(led, HIGH);
if (stare0 == 0) {clic = clic + 1; }
}
if (stare == 0) {
client.print("<p>LED is OFF</p>");
digitalWrite(led, LOW);
// if (stare0 == 1) {clic = clic + 1; }
}
//if (stare0 =! stare) {clic = clic + 1; }
stare0 = stare;
// write & read data in/from internal EEPROM// calculate the unitar and zecinal units
a = clic/256;
b = clic - a*256;
// write in internal eepromEEPROM.write(100,a);
EEPROM.write(101,b);
// read from internal eeprom
a1 = EEPROM.read(100);
b1 = EEPROM.read(101);
// recover number of mouse click
clic1 = a1*256 + b1;
// write state in internal eeprom EEPROM.write(102,stare0);
client.print("<p>LED was on ");
client.print(clic1);
client.print(" times from 13:33 (21.febr.2015)<p>");
client.print("<p>Internal temperature of ATmega328P from Arduino board is ");
client.print(readTemp()/10000);
client.print("<sup>o</sup>");
client.print("C<p>");
// client.println("<br />"); // client.println("<br />");
client.println("<H4>");
client.println("<p>Created by Rui Santos. Visit <a href=http://randomnerdtutorials.com target=blank>http://randomnerdtutorials.com</a> for more projects!</p>");
// client.println("<br />");
client.println("<p>Tested by Nicu Florica aka niq_ro. Visit <a href=http://www.tehnic.go.ro target=blank>http://www.tehnic.go.ro</a> for more projects!</p>");
client.println("<br />");
client.println("<H5>");
client.println("version. 3e2 / 21.02.2015<p>");
client.println("</BODY>");
client.println("</HTML>");
// readString=""; delay(1);
//stopping client
client.stop();
//clearing string for next read
readString="";
}
}
}
}
}
// https://code.google.com/p/tinkerit/wiki/SecretThermometerlong readTemp() {
long result;
// Read temperature sensor against 1.1V reference
ADMUX = _BV(REFS1) | _BV(REFS0) | _BV(MUX3);
delay(2); // Wait for Vref to settle
ADCSRA |= _BV(ADSC); // Convertwhile (bit_is_set(ADCSRA,ADSC));
result = ADCL;
result |= ADCH<<8;
result = (result - 125) * 1075;
return result;
}
22.02.2015 Am realizat un filmulet in limba engleza, numit control a LED from Anywhere in the World in care se vede ca am pus si un senzor de umiditate si temperatura de tip DHT11:
25.02.2015 Cu ajutorul lui Cosmin, un coleg de servici, am pus si partea de parola, dupa cum se vede in filmuletul LED controlat prin internet (2)
poze pierdute repostate in 06.10.2015 Acum ceva timp am folosit placa de retea cu cipset W5100 de tip shield (se aseaza direct pe Arduino Uno, fara alte legaturi) pentru a avea informatii in retea despre temperatura si umiditate (vezi articolul Webserver cu informatii despre temperatura si umiditate oferite de senzorul DHT11), apoi am scris date pe un card SD (vezi Memorare date pe cardul micro SD), acum voi aprinde si stinge un LED. Fizic, placa de retea "shield" cu W5100, arata asa:
La montajul meu am folosit un led multicolor, comandand doar led-ul verde, care e conectat la D9 nefolosit de placa de retea, iar cel rosu si cel albastru sunt conectate pe pini folositi si de placa de retea (D10 si D11):
Starile sunt:
- led verde stins:
- led verde aprins:
Pentru comanda am folosit un telefon conectat prin wireless la retea... dar merge foarte bine si de pe calculator, vedeti in filmuletul LED controlat prin retea sau wireless unde este o varianta simplificata de pagina, doar buton de aprindere si buton de stingere LED, cu indicare stare LED si linkuri la pagina autorului si la a mea:
Poze cu cele 2 stari si pagina nefinisata:
- led verde stins:
- led verde aprins:
Pentru a stii cum e configurata reteaua, se cauta IP-ul calculatorului fix, cu care se face si incarcarea sketch-ului, gasind ca IP-ul este 192.168.2.17, Subset Mask e 255.255.255.1 si Default gateway este 192.168.2.1.. pentru placa de retea folosita la Arduino o sa aloc 192.168.2.178...
Sketch-ul folosit de mine este:
/* Created by Rui Santos Visit: http://randomnerdtutorials.com for more arduino projects Modified by Nicu Florica aka niq_ro visit http://nicuflorica.blogspot.ro/ or http://arduinotehniq.blogspot.com or http://www.tehnic.go.ro Arduino with Ethernet Shield */
#include <SPI.h>
#include <Ethernet.h>
int led = 9;
int pos = 0;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac addressbyte ip[] = { 192, 168, 2, 178 }; // ip in lan (that's what you need to use in your browser. ("192.168.1.178")byte gateway[] = { 192, 168, 2, 1 }; // internet access via routerbyte subnet[] = { 255, 255, 255, 0 }; //subnet maskEthernetServer server(80); //server port String readString;
voidsetup() {
// Open serial communications and wait for port to open:Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
pinMode(led, OUTPUT);
// start the Ethernet connection and the server:Ethernet.begin(mac, ip, gateway, subnet);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
voidloop() {
// Create a client connectionEthernetClient client = server.available();
if (client) {
while (client.connected()) {
if (client.available()) {
char c = client.read();
//read char by char HTTP requestif (readString.length() < 100) {
//store characters to string
readString += c;
//Serial.print(c);
}
//if HTTP request has endedif (c == '\n') {
Serial.println(readString); //print to serial monitor for debuging
client.println("HTTP/1.1 200 OK"); //send new page
client.println("Content-Type: text/html");
client.println();
client.println("<HTML>");
client.println("<HEAD>");
client.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
client.println("<meta name='apple-mobile-web-app-status-bar-style' content='black-translucent' />");
client.println("<link rel='stylesheet' type='text/css' href='http://randomnerdtutorials.com/ethernetcss.css' />");
client.println("<TITLE>Random Nerd Tutorials Project</TITLE>");
client.println("</HEAD>");
client.println("<BODY>");
client.println("<H2>Random Nerd Tutorials Project</H1>");
client.println("<hr />");
client.println("<br />");
client.println("<H1>Arduino with Ethernet Shield</H2>");
client.println("<br />");
client.println("<a href=\"/?button1on\"\">Turn On LED</a>");
client.println("<a href=\"/?button1off\"\">Turn Off LED</a><br />");
client.println("<br />");
client.println("<br />");
client.println("<H2>");
if (readString.indexOf("?button1on") >0){
client.print("<p>LED is ON</p>");
}
if (readString.indexOf("?button1off") >0){
client.print("<p>LED is OFF</p>");
}
client.println("<br />");
client.println("<br />");
client.println("<H4>");
client.println("<p>Created by Rui Santos. Visit <a href=http://randomnerdtutorials.com target=blank>http://randomnerdtutorials.com</a> for more projects!</p>");
client.println("<br />");
client.println("<p>Tested by Nicu Florica aka niq_ro. Visit <a href=http://www.tehnic.go.ro target=blank>http://www.tehnic.go.ro</a> for more projects!</p>");
client.println("<br />");
client.println("</BODY>");
client.println("</HTML>");
delay(1);
//stopping client
client.stop();
//controls the Arduino if you press the buttonsif (readString.indexOf("?button1on") >0){
digitalWrite(led, HIGH);
// client.print("<p>LED is ON</p>");
}
if (readString.indexOf("?button1off") >0){
digitalWrite(led, LOW);
// client.print("<p>LED is OFF</p>");
}
//clearing string for next read
readString="";
}
}
}
}
}
Primul programior (sketch) pe care l-am testat este "ReadWrite", cel in care se creeaza un fisier text, se scrie in el ceva, se salveaza, apoi se deschide si se citeste textul..
am modificat repede textul de scris, obtinand:
Am deschis si programiorul din exemplele librariei SD, numit "CardInfo":
Avand deja realizata partea de indicare pe ecranul LCD 16x2 a temperaturii si umiditatatii oferite de senzorul DTH11, a orei si datei oferite de ceasul de timp real DS1307, am conectat si placa de retea care are si inscriptor de memorie microSD.
Dupa combinarea mai multor sketch-uri si ceva "sudoare", am realizat partea de scriere pe monitorizarea seriala si intr-un fisier pe cardul de memorie microSD:
Sketch-ul meu este:
// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
Dupa ce am lasat conectat montajul mai multe ore, am constatat uneori ca apar erori la citirea datelor din RTC (ore si minute) si apoi la scriere, m-am gandit e cam mare consumul, asa ca am inlocuit cablul usb cu prelungitor cu un cablu de cca. 1m de la un scanner si, totodata, sting lumina de fundal al afisajului cu cristale lichide cand se face scrierea...
O alta solutie, pentru reducerea consumului, este aceea in care sa folosesc doar un modul de microSD...
Sketch-ul modificat este:
// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
