ESP8266 / ESP8266Interface

ESP8266 Socket Library. AT Thinker firmware.

Dependents:   ESP8266_MQTT_HelloWorld ESP8266_IFTTT_Test ECE_4180_Lab_4 websocketmbed ... more

Fork of ESP8266Interface by ESP8266

This repository has been superceded

This project has moved to https://developer.mbed.org/teams/ESP8266/code/esp8266-driver/

This library works with the AT Thinker firmware.

Note

This library is currently in Beta. It is not feature complete and has some bugs, proceed with caution! Fixes and patches are welcome and appreciated!

Currently the ESP8266Interface Library has the following Abilities:

Working

  • TCP Client
  • UDP Client
  • Transparent mode (single connection of 1 type at a time)
  • Station Mode (connects to AP)

To be implemented

  • TCP Server
  • UDP Server
  • Multi Connection Mode (able to have up to 5 sockets at a time)
  • AP Mode (Make ESP Chip act like access point)
  • DNS Support (currently websites must be looked up by IP)
  • Error Recovery

Nice but not necessary

  • colorized text for ESP AT Commands in Command line (easier to differentiate from other text)

Diff: Wifly/Wifly.cpp

Revision:
2:8e54830d0df7
Parent:
1:fb4494783863
Child:
3:9aa05e19c62e
--- a/Wifly/Wifly.cpp	Fri Aug 24 13:48:36 2012 +0000
+++ b/Wifly/Wifly.cpp	Sat Nov 24 16:59:36 2012 +0000
@@ -22,7 +22,7 @@
 #include <algorithm>
 
 //Debug is disabled by default
-#if (0 && defined(TARGET_LPC1768))
+#if (0 && !defined(TARGET_LPC11U24))
 #define DBG(x, ...) std::printf("[Wifly : DBG]"x"\r\n", ##__VA_ARGS__);
 #define WARN(x, ...) std::printf("[Wifly : WARN]"x"\r\n", ##__VA_ARGS__);
 #define ERR(x, ...) std::printf("[Wifly : ERR]"x"\r\n", ##__VA_ARGS__);
@@ -32,7 +32,7 @@
 #define ERR(x, ...)
 #endif
 
-#if TARGET_LPC1768
+#if !defined(TARGET_LPC11U24)
 #define INFO(x, ...) printf("[Wifly : INFO]"x"\r\n", ##__VA_ARGS__);
 #else
 #define INFO(x, ...)
@@ -70,6 +70,15 @@
     char cmd[20];
 
     for (int i= 0; i < MAX_TRY_JOIN; i++) {
+
+        // no auto join
+        if (!sendCommand("set w j 0\r", "AOK"))
+            continue;
+
+        //no echo
+        if (!sendCommand("set u m 1\r", "AOK"))
+            continue;
+
         // set time
         if (!sendCommand("set c t 20\r", "AOK"))
             continue;
@@ -93,13 +102,9 @@
         // tcp retry
         if (!sendCommand("set i f 0x7\r", "AOK"))
             continue;
-
-        //no echo
-        if (!sendCommand("set u m 1\r", "AOK"))
-            continue;
-
-        // no auto join
-        if (!sendCommand("set w j 0\r", "AOK"))
+            
+        // set dns server
+        if (!sendCommand("set d n rn.microchip.com\r", "AOK"))
             continue;
 
         //dhcp
@@ -145,16 +150,18 @@
                 continue;
         }
 
-        //join the network
-        sprintf(cmd, "join\r");
-        if (!sendCommand(cmd, "Associated", NULL, 3000))
-            continue;
-
+        //join the network (10s timeout)
         if (state.dhcp) {
-            if (!sendCommand("", "DHCP=ON", NULL, 3000))
+            if (!sendCommand("join\r", "DHCP=ON", NULL, 10000))
+                continue;
+        } else {
+            if (!sendCommand("join\r", "Associated", NULL, 10000))
                 continue;
         }
 
+        if (!sendCommand("save\r", "Stor"))
+            continue;
+
         exit();
 
         state.associated = true;
@@ -211,27 +218,23 @@
     char rcv[20];
     char cmd[20];
 
-    // get ip from host and set host
-    if (gethostbyname(host, rcv)) {
-        sprintf(cmd, "set i h %s\r", rcv);
-        if (!sendCommand(cmd, "AOK"))
-            return false;
-    } else {
-        return false;
+    // try to open
+    sprintf(cmd, "open %s %d\r", host, port);
+    if (sendCommand(cmd, "OPEN", NULL, 10000)) {
+        state.tcp = true;
+        state.cmd_mode = false;
+        return true;
     }
 
-    // set port
-    sprintf(cmd, "set i r %d\r", port);
-    if (!sendCommand(cmd, "AOK"))
-        return false;
-
-    // open
-    if (sendCommand("open\r", NULL, rcv)) {
+    // if failed, retry and parse the response
+    if (sendCommand(cmd, NULL, rcv, 5000)) {
         if (strstr(rcv, "OPEN") == NULL) {
             if (strstr(rcv, "Connected") != NULL) {
+                wait(0.25);
                 if (!sendCommand("close\r", "CLOS"))
                     return false;
-                if (!sendCommand("open\r", "OPEN"))
+                wait(0.25);
+                if (!sendCommand(cmd, "OPEN", NULL, 10000))
                     return false;
             } else {
                 return false;
@@ -240,7 +243,7 @@
     } else {
         return false;
     }
-    
+
     state.tcp = true;
     state.cmd_mode = false;
 
@@ -316,9 +319,10 @@
     // if already in cmd mode, return
     if (state.cmd_mode)
         return true;
-        
+
     if (send("$$$", 3, "CMD") == -1) {
         ERR("cannot enter in cmd mode\r\n");
+        exit();
         return false;
     }
     state.cmd_mode = true;
@@ -330,11 +334,11 @@
     // if already disconnected, return
     if (!state.associated)
         return true;
-        
+
     if (!sendCommand("leave\r", "DeAuth"))
         return false;
     exit();
-    
+
     state.associated = false;
     return true;
 
@@ -359,12 +363,12 @@
     // if not connected, return
     if (!state.tcp)
         return true;
-        
+
     wait(0.25);
     if (!sendCommand("close\r", "CLOS"))
         return false;
     exit();
-    
+
     state.tcp = false;
     return true;
 }