Diff: ESP8266/ESP8266.h

Revision:

13:41098c907200

Parent:

9:f2439377c172

Child:

14:4d1128f72e00

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.h	Sun Nov 30 21:14:09 2014 +0000
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+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * @section DESCRIPTION
+ *
+ * ESP8266 RN131-C, wifi module
+ *
+ * Datasheet:
+ *
+ * http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Wireless/WiFi/ESP8266-RN-UM.pdf
+ */
+
+#ifndef ESP8266_H
+#define ESP8266_H
+
+#include "mbed.h"
+#include "CBuffer.h"
+
+#define DEFAULT_WAIT_RESP_TIMEOUT 500
+
+/**
+ * The ESP8266 class
+ */
+class ESP8266
+{
+
+public:
+    /**
+    * Constructor
+    *
+    * @param tx mbed pin to use for tx line of Serial interface
+    * @param rx mbed pin to use for rx line of Serial interface
+    * @param reset reset pin of the wifi module ()
+    * @param ssid ssid of the network
+    * @param phrase WEP, WPA or WPA2 key
+    */
+    ESP8266( PinName tx, PinName rx, PinName reset, const char * ssid, const char * phrase );
+
+    /**
+    * Connect the wifi module to the ssid contained in the constructor.
+    *
+    * @return true if connected, false otherwise
+    */
+    bool join();
+
+    /**
+    * Disconnect the ESP8266 module from the access point
+    *
+    * @return true if successful
+    */
+    bool disconnect();
+
+    /**
+    * Join to the access point and get DHCP settings
+    * @return true if successful
+    */
+    bool connect();
+    
+    /**
+    * Check connection to the access point
+    * @return true if successful
+    */
+    bool is_connected();
+
+    /**
+    * Reset the wifi module
+    */
+    void reset();
+    
+    /**
+    * Reboot the wifi module
+    */
+    bool reboot();
+
+    /**
+    * Check if characters are available
+    *
+    * @return number of available characters
+    */
+    int readable();
+
+    /**
+    * Check if characters are available
+    *
+    * @return number of available characters
+    */
+    int writeable();
+
+    /**
+    * Read a character
+    *
+    * @return the character read
+    */
+    char getc();
+
+    /**
+    * Flush the buffer
+    */
+    void flush();
+
+    /**
+    * Write a character
+    *
+    * @param the character which will be written
+    */
+    int putc(char c);
+
+    /**
+    * Close a tcp connection
+    *
+    * @return true if successful
+    */
+    bool close();
+    
+    /**
+    * Send a string to the wifi module by serial port. This function desactivates the user interrupt handler when a character is received to analyze the response from the wifi module.
+    * Useful to send a command to the module and wait a response.
+    *
+    *
+    * @param str string to be sent
+    * @param len string length
+    * @param ACK string which must be acknowledge by the wifi module. If ACK == NULL, no string has to be acknoledged. (default: "NO")
+    * @param res this field will contain the response from the wifi module, result of a command sent. This field is available only if ACK = "NO" AND res != NULL (default: NULL)
+    *
+    * @return true if ACK has been found in the response from the wifi module. False otherwise or if there is no response in 5s.
+    */
+    int send(const char * str, int len, const char * ACK = NULL, char * res = NULL, int timeout = DEFAULT_WAIT_RESP_TIMEOUT);
+
+    /**
+    * Send a command to the wify module. Check if the module is in command mode. If not enter in command mode
+    *
+    * @param str string to be sent
+    * @param ACK string which must be acknowledge by the wifi module. If ACK == NULL, no string has to be acknoledged. (default: "NO")
+    * @param res this field will contain the response from the wifi module, result of a command sent. This field is available only if ACK = "NO" AND res != NULL (default: NULL)
+    *
+    * @return true if successful
+    */
+    bool sendCommand(const char * cmd, const char * ack = NULL, char * res = NULL, int timeout = DEFAULT_WAIT_RESP_TIMEOUT);
+
+    bool gethostbyname(const char * host, char * ip);
+
+    static ESP8266 * getInstance() {
+        return inst;
+    };
+
+protected:
+    Serial wifi;
+    DigitalOut reset_pin;
+    char phrase[30];
+    char ssid[30];
+    const char * ip;
+    CircBuffer<char> buf_ESP8266;
+
+    static ESP8266 * inst;
+
+    void attach_rx(bool null);
+    void handler_rx(void);
+
+
+    typedef struct STATE {
+        bool associated;
+    } State;
+
+    State state;
+};
+
+#endif
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