Austin Dong
For Adafruit HUZZAH ESP8266 Wi Fi chip on the mbed LPC1768. Sets up a web page server that can control a mbed onboard LEDs. Need to configure Wi Fi SSID and PASSWORD first with another program (one time only). See https://developer.mbed.org/users/ausdong/notebook/using-the-adafruit-huzzah-esp8266-to-add-wi-fi-to-/ .
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ESP8266-WEB-Mbed-LPC1768-Controller
by 
jim hamblen
Diff: main.cpp
- Revision:
- 2:d4c6bc0f2dc4
- Parent:
- 1:71ed1afbf344
- Child:
- 3:f7febfa77784
--- a/main.cpp Sun Feb 15 12:05:58 2015 +0000
+++ b/main.cpp Thu Feb 19 23:47:54 2015 +0000
@@ -6,53 +6,58 @@
Serial pc(USBTX, USBRX);
Serial esp(PTE0, PTE1); // tx, rx
+DS18B20 thermom(A0, DS18B20::RES_12_BIT);
+
// Standard Mbed LED definitions
DigitalOut led1(LED_RED); // (PTB18)
DigitalOut led2(LED_GREEN); // (PTB19)
DigitalOut led3(LED_BLUE); // (PTD1)
// Digital Out and In pins, can be configured to any suitable pin depending on Platform
-DigitalOut Out1(PTC7);
-DigitalOut Out2(PTC0);
-DigitalOut Out3(PTC3);
+DigitalOut Out1(D7);
+DigitalOut Out2(D8);
+DigitalOut Out3(D4);
-DigitalIn In1(PTC12);
-DigitalIn In2(PTC13);
-DigitalIn In3(PTC16);
+DigitalIn In1(A2);
+DigitalIn In2(A3);
+DigitalIn In3(A4);
-AnalogIn BATin(PTC1);
-
-DS18B20 thermom(PTB0, DS18B20::RES_12_BIT);
+PwmOut speaker(D5);
+AnalogIn BATin(A1);
Timer t1;
Timer t2;
struct tm t;
-int buflen, DataRX, count, ended, servreq, timeout;
-int bufl, ipdLen, linkID, weberror;
+int buflen, DataRX, count, getcount, ended, servreq, timeout;
+int bufl, ipdLen, linkID, weberror, webcounter;
float temperature, AdcIn, Ht;
float R1=100000, R2=10000; // resistor values to give a 10:1 reduction of measured AnalogIn voltage
char Vcc[10];
char Temp[10];
char temp[10];
+char webcount[8];
+char lasthit[60];
char timebuf[30];
char type[16];
char type1[16];
char channel[2];
char snd[256];
char webdata[1024]; // This may need to be bigger depending on WEB browser used
-char buf[2048]; // Currently using 1407 characters, Increase this if more web page data added
+char buf[4096]; // Currently using 1407 characters, Increase this if more web page data added
void SendCMD(),getreply(),ReadWebData(),startserver(),sendpage(),SendWEB(),sendcheck();
-void gettime(),gettemp(),getbattery(),setRTC();
+void gettime(),gettemp(),getbattery(),setRTC(),beep();
// manual set RTC values
-int minute =58; // 0-59
-int hour =11; // 2-23
-int dayofmonth =15; // 1-31
+int minute =13; // 0-59
+int hour =15; // 2-23
+int dayofmonth =19; // 1-31
int month =2; // 1-12
int year =15; // last 2 digits
+
+int port =90; // set server port
// Serial Interrupt read ESP data
void callback() {
@@ -65,38 +70,46 @@
pc.baud(115200);
esp.baud(115200); // ESP8266 baudrate.
if (time(NULL) < 1420070400) {setRTC();}
-
+ beep();
startserver();
while(1){
if(DataRX==1){
ReadWebData();
+ beep();
if (servreq == 1 && weberror == 0){sendpage();}
pc.printf(" IPD Data:\r\n\n Link ID = %d,\r\n IPD Header Length = %d \r\n IPD Type = %s\r\n", linkID, ipdLen, type);
pc.printf("\n\n HTTP Packet: \n\n%s\n", webdata);
pc.printf(" Web Characters sent : %d\n\n", bufl);
pc.printf(" -------------------------------------\n\n");
esp.attach(&callback);
+ strcpy(lasthit, timebuf);
servreq=0;
- }
+ }
+ if(t2.read()>900){startserver();} // restart server every 15 minutes after no activity in case of ESP lock out.
}
}
// Static WEB page
void sendpage()
{
- gettemp();getbattery();gettime();
-// WEB page data
+ gettemp();getbattery();gettime();
memset(buf, '\0', sizeof(buf));
- strcpy(buf, "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n");
- strcat(buf, "<html><head><title>ESP8266 Mbed</title></head>\r\n");
- strcat(buf, "<body>\r\n");
- strcat(buf, "<h1>ESP8266 Mbed Web Controller</h1>\r\n");
- strcat(buf, "<br /><hr>\r\n");
+
+// WEB page data
+ strcpy(buf, "<!DOCTYPE html>");
+ strcat(buf, "<html><head><title>ESP8266 Mbed</title></head>");
+ strcat(buf, "<body>");
+ strcat(buf, "<div style=\"text-align:center; background-color:#F4F4F4; color:#00AEDB;\"><h1>ESP8266 Mbed Web Controller</h1>");
+ strcat(buf, "Hit Count - ");
+ strcat(buf, webcount);
+ strcat(buf, "<br>Last Hit - ");
+ strcat(buf, lasthit);
+ strcat(buf, "</div><br /><hr>");
strcat(buf, "<h3>Mbed RTC Time - ");
strcat(buf, timebuf);
strcat(buf, "</h3>\r\n");
- strcat(buf, "<p><form method=\"POST\"><strong> Temperature: <input type=\"text\" size=4 value=\"");
+ strcat(buf, "<p><form method=\"POST\"><strong> Temperature: <input type=\"text\" size=6 value=\"");
strcat(buf, Temp);
strcat(buf, "\"> <sup>O</sup>C <form method=\"POST\"> <strong> Battery: <input type=\"text\" size=4 value=\"");
strcat(buf, Vcc);
@@ -122,20 +135,29 @@
if(In2==0){strcat(buf, "<br><input type=\"radio\" name=\"In2\" value=\"0\" > Digital In 2");}
else{strcat(buf, "<br><input type=\"radio\" name=\"In2\" value=\"1\" checked> Digital In 2");}
if(In3==0){strcat(buf, "<br><input type=\"radio\" name=\"In3\" value=\"0\" > Digital In 3");}
- else{strcat(buf, "<br><input type=\"radio\" name=\"In3\" value=\"1\" checked> Digital In 3");}
- strcat(buf, "</strong><p><input type=\"submit\"></form></span>");
- strcat(buf, "</body>\r\n</html>\r\n");
+ else{strcat(buf, "<br><input type=\"radio\" name=\"In3\" value=\"1\" checked> Digital In 3");}
+ strcat(buf, "</strong><p><input type=\"submit\" value=\"send-refresh\" style=\"background: #3498db;");
+ strcat(buf, "background-image:-webkit-linear-gradient(top, #3498db, #2980b9);");
+ strcat(buf, "background-image:linear-gradient(to bottom, #3498db, #2980b9);");
+ strcat(buf, "-webkit-border-radius:12;border-radius: 12px;font-family: Arial;color:#ffffff;font-size:20px;padding:");
+ strcat(buf, "10px 20px 10px 20px; border:solid #103c57 3px;text-decoration: none;");
+ strcat(buf, "background: #3cb0fd;");
+ strcat(buf, "background-image:-webkit-linear-gradient(top,#3cb0fd,#1a5f8a);");
+ strcat(buf, "background-image:linear-gradient(to bottom,#3cb0fd,#1a5f8a);");
+ strcat(buf, "text-decoration:none;\"></form></span>");
strcat(buf, "<p/><h2>How to use:</h2><ul>");
strcat(buf, "<li>Select the Radio buttons to control the digital out pins.</li>");
- strcat(buf, "<li>Click 'Submit Query' to send.</li>");
- strcat(buf, "<li>Use the 'Submit Query' button to refresh the page.</li>");
+ strcat(buf, "<li>Click 'Send-Refresh' to send.</li>");
+ strcat(buf, "<li>Use the 'Send-Refresh' button to refresh the data.</li>");
strcat(buf, "</ul>");
+ strcat(buf, "</body></html>");
// end of WEB page data
bufl = strlen(buf); // get total page buffer length
sprintf(snd,"AT+CIPSEND=%s,%d\r\n", channel, bufl); // send IPD link channel and buffer character length.
SendCMD();
wait_ms(100);
SendWEB(); // send web page
+ memset(buf, '\0', sizeof(buf));
sendcheck();
}
@@ -148,7 +170,7 @@
getreply();
if (strstr(buf, "SEND OK") != NULL) {weberror=0;} // wait for valid SEND OK
}
- t2.stop();
+ t2.reset();
if(weberror==1){
pc.printf("\n\n\n ++++++++++ WEB Connect Error, restarting ... ++++++++++\n\n");
NVIC_SystemReset();}
@@ -178,8 +200,10 @@
sprintf(channel, "%d",linkID);
if (strstr(webdata, "GET") != NULL) {servreq=1;}
if (strstr(webdata, "POST") != NULL) {servreq=1;}
+ webcounter++;
+ sprintf(webcount, "%d",webcounter);
}
- else {strcpy(webdata, buf);weberror=1;}
+ else {strcpy(webdata, buf);weberror=1;}
led3=1;
}
// Starts and restarts webserver if errors detected.
@@ -192,19 +216,22 @@
pc.printf("++++++++++ Resetting ESP ++++++++++\r\n");
strcpy(snd,"AT+RST\r\n");
SendCMD();
- timeout=2000;
+ timeout=2000;getcount=336;
getreply();
if (strstr(buf, "ready") != NULL) {
pc.printf("\n++++++++++ Starting Server ++++++++++\r\n");
strcpy(snd, "AT+CIPMUX=1\r\n"); // set multiple connections.
SendCMD();
- wait_ms(50);
- strcpy(snd, "AT+CIPSERVER=1,80\r\n"); // set to port 80, you can change this to what you want.
+ timeout=500;getcount=10;
+ getreply();
+ strcpy(snd, "AT+CIPSERVER=1,90\r\n");
+ //sprintf(snd,"AT+CIPSERVER=1,%d\r\n", port);
SendCMD();
- wait_ms(200);
+ timeout=500;getcount=10;
+ getreply();
pc.printf("\n Getting Server IP \r\n");
strcpy(snd, "AT+CIFSR\r\n");
- timeout=500;
+ timeout=1000;getcount=50;
while(weberror==0){
SendCMD();getreply();
if (strstr(buf, "0.0.0.0") == NULL) {weberror=1;} // wait for valid IP
@@ -212,7 +239,7 @@
pc.printf("\n Enter WEB address in your browser \r\n\n");
buf[strlen(buf) - 8] = '\0';
char* IP = buf + 5;
- sprintf(snd," http://%s:80", IP);
+ sprintf(snd," http://%s:%d", IP, port);
pc.printf(snd);
while (esp.readable()){esp.getc();}
buflen=200;count=0;
@@ -224,7 +251,8 @@
else{
pc.printf("\n++++++++++ ESP8266 error, check power/connections ++++++++++\r\n");
while(1){}
- }
+ }
+ t2.reset();t2.start();beep();
}
// ESP Command data send
void SendCMD()
@@ -243,27 +271,25 @@
void getreply()
{
memset(buf, '\0', sizeof(buf));
- t1.start();
+ t1.reset(); t1.start();
ended=0;count=0;
- while(!ended) {
+ while(t1.read_ms()< timeout && count < getcount) {
if(esp.readable()) {
buf[count] = esp.getc();count++;
}
- if(t1.read_ms() > timeout) {
- ended = 1;t1.stop();t1.reset();
- }
- }
+ }
+ t1.stop();
}
// Analog in example
void getbattery()
{
AdcIn=BATin.read();
- Ht = (AdcIn*3.328*(R1+R2)/R2); // set the numeric to the exact MCU analog reference voltage for greater accuracy
+ Ht = (AdcIn*3.328f*(R1+R2)/R2); // set the numeric to the exact MCU analog reference voltage for greater accuracy
sprintf(Vcc,"%2.3f",Ht);
}
// Temperature example
void gettemp()
-{
+{
temperature=thermom.GetTemperature(); // comment this out if no sensor connected
//temperature = 21.357; // include for dummy value
sprintf(Temp,"%3.3f",temperature);
@@ -275,6 +301,14 @@
strftime(timebuf,50,"%H:%M:%S %a %d %b %y", localtime(&seconds));
}
+void beep()
+{
+ speaker.period(1.0/2000); // 2000hz period
+ speaker = 0.5; //50% duty cycle - max volume
+ wait_ms(60);
+ speaker=0.0; // turn off audio
+}
+
void setRTC()
{
t.tm_sec = (0); // 0-59