Components / ESP8266Interface

Socket interface for ESP8266. Implements the NetworkSocketAPI. Requires device to use the Espressif Firmware.

Dependencies:   ESP8266

Dependents:   ESP8266InterfaceTests HelloESP8266Interface

Fork of ESP8266Interface by NetworkSocketAPI

Note

This library assumes your ESP8266 is running the Espressif Firmware. For instructions on how to update your ESP8266 to use the correct firmware see the Firmware Update Wiki Page.

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 implimented

  • 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: ESP8266Interface.cpp

Revision:
22:312453862371
Parent:
20:5d0762aa4680
Child:
23:fd0f3197c30b
--- a/ESP8266Interface.cpp	Tue Jul 21 20:18:55 2015 +0000
+++ b/ESP8266Interface.cpp	Wed Jul 22 20:53:09 2015 +0000
@@ -20,9 +20,9 @@
 ESP8266Interface::ESP8266Interface(PinName tx, PinName rx)
 : serial(tx, rx), atParser(&serial)
 {
+    uuidCounter = 0;
     serial.baud(115200);
-    availableID = new int[5];
-    for(int i = 0; i<4; i++){
+    for(int i = 0; i<numSockets; i++){
         availableID[i] = -1;
     }
 }
@@ -49,7 +49,7 @@
 
 int32_t ESP8266Interface::init(const char *ip, const char *mask, const char *gateway) 
 {
-    return -1;
+
 }
 
 int32_t ESP8266Interface::connect(uint32_t timeout_ms) 
@@ -69,9 +69,16 @@
     return 0;    
 }
 
-int32_t ESP8266Interface::disconnect(void) const
+int32_t ESP8266Interface::disconnect(void)
 {
-    return -1;
+    if (!(atParser.send("AT+CWQAP") && atParser.recv("OK")))
+        return -1;
+    for(int i=0; i<numSockets; i++){
+        SocketInterface *socket = sockets[availableID[i]];
+        deallocateSocket(socket);
+    }
+    return 0;
+    
 }
 
 char *ESP8266Interface::getIPAddress(void)
@@ -104,9 +111,8 @@
 SocketInterface *ESP8266Interface::allocateSocket(socket_protocol_t socketProtocol) 
 {   
     int id = -1;
-    uuidCounter += 1;
     //Look through the array of available sockets for an unused ID
-    for(int i=0; i<sizeof(availableID); i++){
+    for(int i=0; i<numSockets; i++){
         if (availableID[i] == -1){
             id = i;   
             availableID[i] = uuidCounter;
@@ -116,7 +122,8 @@
     if (id == -1){
         return NULL;//tried  to allocate more than the maximum 5 sockets   
     }
-    ESP8266Socket *socket = new ESP8266Socket(uuidCounter, &atParser, socketProtocol, (uint8_t)id);
+    ESP8266Socket *socket = new ESP8266Socket(uuidCounter++, &atParser, socketProtocol, (uint8_t)id);
+    sockets[socket->getHandle()] = socket;
     return socket;
 }
 
@@ -124,12 +131,27 @@
 {
     int id = (int)static_cast<ESP8266Socket*>(socket)->getID();
     availableID[id] = -1;
-    return id;
+    
+    std::map<uint32_t, SocketInterface*>::iterator it;
+ 
+    // Check if socket is owned by WiFiRadioInterface
+    it = sockets.find(socket->getHandle());
+    
+    if (it != sockets.end()) {
+        // If so, erase it from the internal socket map and deallocate the socket
+        sockets.erase(it);
+        delete socket;
+        return 0;
+    } else {
+        // Socket is not owned by WiFiRadioInterface, so return -1 error
+        return -1;
+    }
 }
 
 ESP8266Socket::ESP8266Socket(uint32_t handle, ATParser *atParser, socket_protocol_t type, uint8_t id)
-: _handle(handle), atParser(atParser), _id(id)
+: atParser(atParser), _id(id)
 {
+    _handle = handle;
     SocketInterface::_type = type;
 }
 
@@ -241,6 +263,12 @@
     }
     return 0;
 }
+
+uint32_t ESP8266Socket::getHandle()const
+{
+    return _handle;
+}
+
 uint8_t ESP8266Socket::getID()
 {
     return _id;