Diff: easy-connect/esp8266-driver/ESP8266/ESP8266.h

Revision:

0:24d3eb812fd4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/easy-connect/esp8266-driver/ESP8266/ESP8266.h	Wed Sep 05 14:28:24 2018 +0000
@@ -0,0 +1,309 @@
+/* ESP8266Interface Example
+ * Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ESP8266_H
+#define ESP8266_H
+
+#include "ATCmdParser.h"
+#include "nsapi_types.h"
+#include "rtos.h"
+
+// Various timeouts for different ESP8266 operations
+#ifndef ESP8266_CONNECT_TIMEOUT
+#define ESP8266_CONNECT_TIMEOUT 15000
+#endif
+#ifndef ESP8266_SEND_TIMEOUT
+#define ESP8266_SEND_TIMEOUT    2000
+#endif
+#ifndef ESP8266_RECV_TIMEOUT
+#define ESP8266_RECV_TIMEOUT    2000
+#endif
+#ifndef ESP8266_MISC_TIMEOUT
+#define ESP8266_MISC_TIMEOUT    2000
+#endif
+
+/** ESP8266Interface class.
+    This is an interface to a ESP8266 radio.
+ */
+class ESP8266
+{
+public:
+    ESP8266(PinName tx, PinName rx, bool debug=false);
+
+    /**
+    * Check firmware version of ESP8266
+    *
+    * @return integer firmware version or -1 if firmware query command gives outdated response
+    */
+    int get_firmware_version(void);
+    
+    /**
+    * Startup the ESP8266
+    *
+    * @param mode mode of WIFI 1-client, 2-host, 3-both
+    * @return true only if ESP8266 was setup correctly
+    */
+    bool startup(int mode);
+
+    /**
+    * Reset ESP8266
+    *
+    * @return true only if ESP8266 resets successfully
+    */
+    bool reset(void);
+
+    /**
+    * Enable/Disable DHCP
+    *
+    * @param enabled DHCP enabled when true
+    * @param mode mode of DHCP 0-softAP, 1-station, 2-both
+    * @return true only if ESP8266 enables/disables DHCP successfully
+    */
+    bool dhcp(bool enabled, int mode);
+
+    /**
+    * Connect ESP8266 to AP
+    *
+    * @param ap the name of the AP
+    * @param passPhrase the password of AP
+    * @return NSAPI_ERROR_OK only if ESP8266 is connected successfully
+    */
+    nsapi_error_t connect(const char *ap, const char *passPhrase);
+
+    /**
+    * Disconnect ESP8266 from AP
+    *
+    * @return true only if ESP8266 is disconnected successfully
+    */
+    bool disconnect(void);
+
+    /**
+    * Get the IP address of ESP8266
+    *
+    * @return null-teriminated IP address or null if no IP address is assigned
+    */
+    const char *getIPAddress(void);
+
+    /**
+    * Get the MAC address of ESP8266
+    *
+    * @return null-terminated MAC address or null if no MAC address is assigned
+    */
+    const char *getMACAddress(void);
+
+     /** Get the local gateway
+     *
+     *  @return         Null-terminated representation of the local gateway
+     *                  or null if no network mask has been recieved
+     */
+    const char *getGateway();
+
+    /** Get the local network mask
+     *
+     *  @return         Null-terminated representation of the local network mask 
+     *                  or null if no network mask has been recieved
+     */
+    const char *getNetmask();
+
+    /* Return RSSI for active connection
+     *
+     * @return      Measured RSSI
+     */
+    int8_t getRSSI();
+
+    /** Scan for available networks
+     *
+     * @param  ap    Pointer to allocated array to store discovered AP
+     * @param  limit Size of allocated @a res array, or 0 to only count available AP
+     * @return       Number of entries in @a res, or if @a count was 0 number of available networks, negative on error
+     *               see @a nsapi_error
+     */
+    int scan(WiFiAccessPoint *res, unsigned limit);
+    
+    /**Perform a dns query
+    *
+    * @param name Hostname to resolve
+    * @param ip   Buffer to store IP address
+    * @return 0 true on success, false on failure
+    */
+    bool dns_lookup(const char *name, char *ip);
+
+    /**
+    * Open a socketed connection
+    *
+    * @param type the type of socket to open "UDP" or "TCP"
+    * @param id id to give the new socket, valid 0-4
+    * @param port port to open connection with
+    * @param addr the IP address of the destination
+    * @param port the port on the destination
+    * @param local_port UDP socket's local port, zero means any
+    * @return true only if socket opened successfully
+    */
+    nsapi_error_t open_udp(int id, const char* addr, int port, int local_port = 0);
+
+    /**
+    * Open a socketed connection
+    *
+    * @param type the type of socket to open "UDP" or "TCP"
+    * @param id id to give the new socket, valid 0-4
+    * @param port port to open connection with
+    * @param addr the IP address of the destination
+    * @param port the port on the destination
+    * @param tcp_keepalive TCP connection's keep alive time, zero means disabled
+    * @return true only if socket opened successfully
+    */
+    bool open_tcp(int id, const char* addr, int port, int keepalive = 0);
+
+    /**
+    * Sends data to an open socket
+    *
+    * @param id id of socket to send to
+    * @param data data to be sent
+    * @param amount amount of data to be sent - max 1024
+    * @return NSAPI_ERROR_OK in success, negative error code in failure
+    */
+    nsapi_error_t send(int id, const void *data, uint32_t amount);
+
+    /**
+    * Receives datagram from an open UDP socket
+    *
+    * @param id id to receive from
+    * @param data placeholder for returned information
+    * @param amount number of bytes to be received
+    * @return the number of bytes received
+    */
+    int32_t recv_udp(int id, void *data, uint32_t amount, uint32_t timeout=ESP8266_RECV_TIMEOUT);
+
+    /**
+    * Receives stream data from an open TCP socket
+    *
+    * @param id id to receive from
+    * @param data placeholder for returned information
+    * @param amount number of bytes to be received
+    * @return the number of bytes received
+    */
+    int32_t recv_tcp(int id, void *data, uint32_t amount, uint32_t timeout=ESP8266_RECV_TIMEOUT);
+
+    /**
+    * Closes a socket
+    *
+    * @param id id of socket to close, valid only 0-4
+    * @return true only if socket is closed successfully
+    */
+    bool close(int id);
+
+    /**
+    * Allows timeout to be changed between commands
+    *
+    * @param timeout_ms timeout of the connection
+    */
+    void setTimeout(uint32_t timeout_ms=ESP8266_MISC_TIMEOUT);
+
+    /**
+    * Checks if data is available
+    */
+    bool readable();
+
+    /**
+    * Checks if data can be written
+    */
+    bool writeable();
+
+    /**
+    * Attach a function to call whenever sigio happens in the serial
+    *
+    * @param func A pointer to a void function, or 0 to set as none
+    */
+    void sigio(Callback<void()> func);
+
+    /**
+    * Attach a function to call whenever sigio happens in the serial
+    *
+    * @param obj pointer to the object to call the member function on
+    * @param method pointer to the member function to call
+    */
+    template <typename T, typename M>
+    void sigio(T *obj, M method) {
+        sigio(Callback<void()>(obj, method));
+    }
+
+    /**
+    * Attach a function to call whenever network state has changed
+    *
+    * @param func A pointer to a void function, or 0 to set as none
+    */
+    void attach(mbed::Callback<void(nsapi_event_t, intptr_t)> status_cb);
+
+    /**
+     * Read default Wifi mode from flash
+     *
+     * return Station, SoftAP or SoftAP+Station - 0 on failure
+     */
+    int8_t get_default_wifi_mode();
+
+    /**
+     * Write default Wifi mode to flash
+     */
+    bool set_default_wifi_mode(const int8_t mode);
+
+    /** Get the connection status
+     *
+     *  @return         The connection status according to ConnectionStatusType
+     */
+    nsapi_connection_status_t get_connection_status() const;
+
+    static const int8_t WIFIMODE_STATION = 1;
+    static const int8_t WIFIMODE_SOFTAP = 2;
+    static const int8_t WIFIMODE_STATION_SOFTAP = 3;
+    static const int8_t SOCKET_COUNT = 5;
+
+private:
+    UARTSerial _serial;
+    ATCmdParser _parser;
+    Mutex _smutex; // Protect serial port access
+
+    struct packet {
+        struct packet *next;
+        int id;
+        uint32_t len;
+        // data follows
+    } *_packets, **_packets_end;
+    void _packet_handler();
+    void _connect_error_handler();
+    bool recv_ap(nsapi_wifi_ap_t *ap);
+    void _oob_socket0_closed_handler();
+    void _oob_socket1_closed_handler();
+    void _oob_socket2_closed_handler();
+    void _oob_socket3_closed_handler();
+    void _oob_socket4_closed_handler();
+    void _connection_status_handler();
+    void _oob_socket_close_error();
+    void _clear_socket_packets(int id);
+
+    char _ip_buffer[16];
+    char _gateway_buffer[16];
+    char _netmask_buffer[16];
+    char _mac_buffer[18];
+
+    int _connect_error;
+    bool _fail;
+    bool _closed;
+    int _socket_open[SOCKET_COUNT];
+    nsapi_connection_status_t _connection_status;
+    Callback<void(nsapi_event_t, intptr_t)> _connection_status_cb;
+};
+
+#endif