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ESP01_UartWifi_MyFirmata.ino
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/*
ESP-01 + Arduino Uno (without using AT Command)
Author : ChungYi Fu (Kaohsiung, Taiwan) 2018-10-13 16:00
https://www.facebook.com/francefu
Expanding Arduino Serial Port Buffer Size
https://internetofhomethings.com/homethings/?p=927
Control Page (http)
https://github.com/fustyles/Arduino/blob/master/ESP8266_MyFirmata.html
Wifi Command Format :
http://APIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
http://STAIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
Uart Command Format :
?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
Default APIP： 192.168.4.1
http://192.168.4.1/?ip
http://192.168.4.1/?mac
http://192.168.4.1/?restart
http://192.168.4.1/?resetwifi=ssid;password
http://192.168.4.1/?tcp=domain;port;request;wait
http://192.168.4.1/?ifttt=event;key;value1;value2;value3
http://192.168.4.1/?thingspeakupdate=key;field1;field2;field3;field4;field5;field6;field7;field8
http://192.168.4.1/?thingspeakread=request
STAIP：
Query： http://192.168.4.1/?ip
Link：http://192.168.4.1/?resetwifi=ssid;password
If you don't need to get response from ESP8266 and want to execute commands quickly,
you can append a parameter value "stop" at the end of command.
For example:
http://192.168.4.1/?digitalwrite=gpio;value;stop
http://192.168.4.1/?restart=stop
Control Page (http)
Source
https://github.com/fustyles/webduino/blob/master/ESP8266_MyFirmata.html
Page
https://fustyles.github.io/webduino/ESP8266_MyFirmata.html
*/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(0, 2); // ESP01 TX(gpio2)->D10, RX(gpio0)->D11
#include <ESP8266WiFi.h>
// Enter your WiFi ssid and password
const char* ssid = "xxxxx"; //your network SSID
const char* password = "xxxxx"; //your network password
const char* apssid = "MyFirmata ESP01";
const char* appassword = "12345678"; //AP password require at least 8 characters.
WiFiServer server(80);
String Feedback="", Command="",cmd="",str1="",str2="",str3="",str4="",str5="",str6="",str7="",str8="",str9="";
byte ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;
boolean debug = false;
void ExecuteCommand()
{
Serial.println("");
//Serial.println("Command: "+Command);
Serial.println("cmd= "+cmd+" ,str1= "+str1+" ,str2= "+str2+" ,str3= "+str3+" ,str4= "+str4+" ,str5= "+str5+" ,str6= "+str6+" ,str7= "+str7+" ,str8= "+str8+" ,str9= "+str9);
Serial.println("");
if (cmd=="ip")
{
Feedback="AP IP: "+WiFi.softAPIP().toString();
Feedback+=", ";
Feedback+="STA IP: "+WiFi.localIP().toString();
}
else if (cmd=="mac")
{
Feedback="STA MAC: "+WiFi.macAddress();
}
else if (cmd=="restart")
{
setup();
Feedback=Command;
}
else if (cmd=="resetwifi")
{
WiFi.begin(str1.c_str(), str2.c_str());
Serial.print("Connecting to ");
Serial.println(str1);
long int StartTime=millis();
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
if ((StartTime+5000) < millis()) break;
}
Serial.println("");
Serial.println("STAIP: "+WiFi.localIP().toString());
Feedback="STAIP: "+WiFi.localIP().toString();
/*
if (WiFi.localIP().toString()!="0.0.0.0")
{
cmd="ifttt";
str1="eventname";
str2="key";
str3=WiFi.localIP().toString();
ExecuteCommand();
}
*/
}
else if (cmd=="tcp")
{
String domain=str1;
int port=str2.toInt();
String request=str3;
int wait=str4.toInt(); // wait = 0 or 1
Feedback=tcp(domain,request,port,wait);
}
else if (cmd=="ifttt")
{
String domain="maker.ifttt.com";
String request = "/trigger/" + str1 + "/with/key/" + str2;
request += "?value1="+str3+"&value2="+str4+"&value3="+str5;
Feedback=tcp(domain,request,80,0);
}
else if (cmd=="thingspeakupdate")
{
String domain="api.thingspeak.com";
String request = "/update?api_key=" + str1;
request += "&field1="+str2+"&field2="+str3+"&field3="+str4+"&field4="+str5+"&field5="+str6+"&field6="+str7+"&field7="+str8+"&field8="+str9;
Feedback=tcp(domain,request,80,0);
}
else if (cmd=="thingspeakread")
{
String domain="api.thingspeak.com";
String request = str1;
Feedback=tcp(domain,request,80,1);
}
else
{
Feedback="Command is not defined";
mySerial.println(Command); // Send Command to Arduino Uno
mySerial.flush();
delay(10);
}
if (debug==true)
{
Serial.println(Feedback);
mySerial.println(Feedback); // Send Feedback to Arduino Uno
mySerial.flush();
delay(10);
}
}
void setup()
{
mySerial.begin(9600);
mySerial.setTimeout(10);
Serial.begin(115200);
delay(10);
WiFi.mode(WIFI_AP_STA);
WiFi.softAP(apssid, appassword);
//WiFi.softAPConfig(IPAddress(192, 168, 4, 1), IPAddress(192, 168, 4, 1), IPAddress(255, 255, 255, 0));
delay(1000);
Serial.println("");
Serial.println("APIP address: ");
Serial.println(WiFi.softAPIP());
//WiFi.config(IPAddress(192, 168, 201, 100), IPAddress(192, 168, 201, 2), IPAddress(255, 255, 255, 0));
WiFi.begin(ssid, password);
delay(1000);
Serial.println("");
Serial.print("Connecting to ");
Serial.println(ssid);
long int StartTime=millis();
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
if ((StartTime+5000) < millis()) break;
}
if (WiFi.status() == WL_CONNECTED)
{
pinMode(2, OUTPUT);
for (int i=0;i<5;i++)
{
digitalWrite(2,LOW);
delay(100);
digitalWrite(2,HIGH);
delay(100);
}
}
Serial.println("");
Serial.println("STAIP address: ");
Serial.println(WiFi.localIP());
server.begin();
}
void loop()
{
Command="";cmd="";str1="";str2="";str3="";str4="";str5="";str6="";str7="";str8="";str9="";
ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;
if (Serial.available())
{
while (Serial.available())
{
char c=Serial.read();
Serial.print(String(c));
getCommand(c);
delay(1);
}
if (cmd!="") ExecuteCommand();
}
if (mySerial.available())
{
while (mySerial.available())
{
char c=mySerial.read();
getCommand(c);
delay(1);
}
if (cmd!="") ExecuteCommand();
}
WiFiClient client = server.available();
if (client)
{
String currentLine = "";
while (client.connected())
{
if (client.available())
{
char c = client.read();
getCommand(c);
if (c == '\n')
{
if (currentLine.length() == 0)
{
/*
client.println("HTTP/1.1 200 OK");
client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
client.println("Content-Type: application/json;charset=utf-8");
client.println("Access-Control-Allow-Origin: *");
//client.println("Connection: close");
client.println();
client.println("[{\"esp8266\":\""+Feedback+"\"}]");
client.println();
*/
/*
client.println("HTTP/1.1 200 OK");
client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
client.println("Content-Type: text/xml; charset=utf-8");
client.println("Access-Control-Allow-Origin: *");
//client.println("Connection: close");
client.println();
client.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
client.println("<esp8266><feedback>"+Feedback+"</feedback></esp8266>");
client.println();
*/
Feedback+="<br><br>";
Feedback+="<form method=\"get\" action=\"\">";
Feedback+="cmd:";
Feedback+="<select name=\"cmd\" id=\"cmd\">";
Feedback+="<option value=\"ip\">IP</option>";
Feedback+="<option value=\"mac\">MAC</option>";
Feedback+="<option value=\"restart\">Restart</option>";
Feedback+="<option value=\"resetwifi\">ResetWifi</option>";
Feedback+="<option value=\"tcp\">tcp</option>";
Feedback+="<option value=\"ifttt\">ifttt</option>";
Feedback+="<option value=\"thingspeakupdate\">thingspeakupdate</option>";
Feedback+="<option value=\"thingspeakread\">thingspeakread</option>";
Feedback+="</select>";
Feedback+="<br><br>str1:";
Feedback+="<input type=\"text\" name=\"str1\" id=\"str1\" size=\"20\">";
Feedback+="<br><br>str2:";
Feedback+="<input type=\"text\" name=\"str2\" id=\"str2\" size=\"20\">";
Feedback+="<br><br>str3:";
Feedback+="<input type=\"text\" name=\"str3\" id=\"str3\" size=\"20\">";
Feedback+="<br><br>str4:";
Feedback+="<input type=\"text\" name=\"str4\" id=\"str4\" size=\"20\">";
Feedback+="<br>(str4;str5;str6;str7;str8;str9)<br><br>";
Feedback+="<input type=\"button\" value=\"Send\" onclick=\"location.href='?'+cmd.value+'='+str1.value+';'+str2.value+';'+str3.value+';'+str4.value\">";
Feedback+="</form>";
client.println("HTTP/1.1 200 OK");
client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
client.println("Content-Type: text/html; charset=utf-8");
client.println("Access-Control-Allow-Origin: *");
//client.println("Connection: close");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html><head>");
client.println("<meta charset=\"UTF-8\">");
client.println("<meta http-equiv=\"Access-Control-Allow-Origin\" content=\"*\">");
client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
client.println("</head><body>");
client.println(Feedback);
client.println("</body></html>");
client.println();
Feedback="";
break;
} else {
currentLine = "";
}
}
else if (c != '\r')
{
currentLine += c;
}
if ((currentLine.indexOf("/?")!=-1)&&(currentLine.indexOf(" HTTP")!=-1))
{
if (Command.indexOf("stop")!=-1) {
client.println();
client.println();
client.stop();
}
currentLine="";
Feedback="";
ExecuteCommand();
}
}
}
delay(1);
client.stop();
}
}
void getCommand(char c)
{
if (c=='?') ReceiveState=1;
if ((c==' ')||(c=='\r')||(c=='\n')) ReceiveState=0;
if (ReceiveState==1)
{
Command=Command+String(c);
if (c=='=') cmdState=0;
if (c==';') strState++;
if ((cmdState==1)&&((c!='?')||(questionstate==1))) cmd=cmd+String(c);
if ((cmdState==0)&&(strState==1)&&((c!='=')||(equalstate==1))) str1=str1+String(c);
if ((cmdState==0)&&(strState==2)&&(c!=';')) str2=str2+String(c);
if ((cmdState==0)&&(strState==3)&&(c!=';')) str3=str3+String(c);
if ((cmdState==0)&&(strState==4)&&(c!=';')) str4=str4+String(c);
if ((cmdState==0)&&(strState==5)&&(c!=';')) str5=str5+String(c);
if ((cmdState==0)&&(strState==6)&&(c!=';')) str6=str6+String(c);
if ((cmdState==0)&&(strState==7)&&(c!=';')) str7=str7+String(c);
if ((cmdState==0)&&(strState==8)&&(c!=';')) str8=str8+String(c);
if ((cmdState==0)&&(strState>=9)&&((c!=';')||(semicolonstate==1))) str9=str9+String(c);
if (c=='?') questionstate=1;
if (c=='=') equalstate=1;
if ((strState>=9)&&(c==';')) semicolonstate=1;
}
}
String tcp(String domain,String request,int port,byte wait)
{
WiFiClient client_tcp;
if (client_tcp.connect(domain, port))
{
Serial.println("GET " + request);
client_tcp.println("GET " + request + " HTTP/1.1");
client_tcp.println("Host: " + domain);
client_tcp.println("Connection: close");
client_tcp.println();
String getResponse="",Feedback="";
boolean state = false;
int waitTime = 3000; // timeout 3 seconds
long startTime = millis();
while ((startTime + waitTime) > millis())
{
while (client_tcp.available())
{
char c = client_tcp.read();
if (state==true) Feedback += String(c);
if (c == '\n')
{
if (getResponse.length()==0) state=true;
getResponse = "";
}
else if (c != '\r')
getResponse += String(c);
if (wait==1)
startTime = millis();
}
if (wait==0)
if ((state==true)&&(Feedback.length()!= 0)) break;
}
client_tcp.stop();
return Feedback;
}
else
return "Connection failed";
}
/*
Arduino Uno
Uart Command Format:
?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
?tcp=domain;port;request;wait
?ifttt=event;key;value1;value2;value3
?thingspeakupdate=key;field1;field2;field3;field4;field5;field6;field7;field8
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // ESP01 TX(gpio2)->D10, RX(gpio0)->D11
void setup()
{
Serial.begin(9600);
mySerial.begin(9600);
}
void loop()
{
while (mySerial.available())
{
char c=mySerial.read();
Serial.write(c);
}
while (Serial.available())
{
char c=Serial.read();
mySerial.print(c);
}
}
*/