WINC1500 MQTT chat example.

#include "asf.h"
#include "main.h"
#include "driver/include/m2m_wifi.h"
#include "MQTTClient/Wrapper/mqtt.h"
#include "socket/include/socket.h"

Macros
#define	STRING_EOL "\r\n"

#define	STRING_HEADER

Functions
static void	check_usart_buffer (char *topic)
	Checking the USART buffer. More...

static void	configure_console (void)
	Configure UART console. More...

static void	configure_mqtt (void)
	Configure MQTT service. More...

int	main (void)
	Main application function. More...

static void	mqtt_callback (struct mqtt_module module_inst, int type, union mqtt_data data)
	Callback to get the MQTT status update. More...

static void	socket_event_handler (SOCKET sock, uint8_t msg_type, void *msg_data)
	Callback to get the Socket event. More...

static void	socket_resolve_handler (uint8_t *doamin_name, uint32_t server_ip)
	Callback of gethostbyname function. More...

void	SubscribeHandler (MessageData *msgData)
	Prototype for MQTT subscribe Callback. More...

static void	uart_callback (const struct usart_module *const module)
	Callback of USART input. More...

static void	wifi_callback (uint8 msg_type, void *msg_data)
	Callback to get the Wi-Fi status update. More...

Variables
static struct usart_module	cdc_uart_module
	UART module for debug. More...

static struct mqtt_module	mqtt_inst

static unsigned char	mqtt_read_buffer [MAIN_MQTT_BUFFER_SIZE]

static unsigned char	mqtt_send_buffer [MAIN_MQTT_BUFFER_SIZE]

char	mqtt_user [64] = ""
	User name of chat. More...

static char	uart_buffer [MAIN_CHAT_BUFFER_SIZE]
	UART buffer. More...

static int	uart_buffer_written = 0
	Written size of UART buffer. More...

static uint16_t	uart_ch_buffer
	A buffer of character from the serial. More...

#define STRING_EOL "\r\n"

#define STRING_HEADER

Value:

"-- WINC1500 Wi-Fi MQTT chat example --"STRING_EOL \
    "-- "BOARD_NAME " --"STRING_EOL \
    "-- Compiled: "__DATE__ " "__TIME__ " --"STRING_EOL

Referenced by main().

static void check_usart_buffer ( char * topic )

static

Checking the USART buffer.

Finding the new line character(
or
) in the USART buffer. If buffer was overflowed, Sending the buffer.

References MAIN_CHAT_BUFFER_SIZE, mqtt_inst, mqtt_publish(), uart_buffer, and uart_buffer_written.

Referenced by main().

static void configure_console ( void )

static

Configure UART console.

References usart_config::baudrate, cdc_uart_module, EDBG_CDC_MODULE, EDBG_CDC_SERCOM_MUX_SETTING, EDBG_CDC_SERCOM_PINMUX_PAD0, EDBG_CDC_SERCOM_PINMUX_PAD1, EDBG_CDC_SERCOM_PINMUX_PAD2, EDBG_CDC_SERCOM_PINMUX_PAD3, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, uart_callback(), USART_CALLBACK_BUFFER_RECEIVED, usart_enable(), usart_get_config_defaults(), and usart_register_callback().

Referenced by main().

static void configure_mqtt ( void )

static

Configure MQTT service.

References MAIN_MQTT_BUFFER_SIZE, mqtt_callback(), mqtt_get_config_defaults(), mqtt_init(), mqtt_inst, mqtt_read_buffer, mqtt_register_callback(), mqtt_send_buffer, mqtt_config::read_buffer, mqtt_config::read_buffer_size, mqtt_config::send_buffer, and mqtt_config::send_buffer_size.

Referenced by main().

int main ( void )

Main application function.

Application entry point.

Returns: program return value.

References cdc_uart_module, check_usart_buffer(), configure_console(), configure_mqtt(), mqtt_module::isConnected, M2M_SUCCESS, M2M_WIFI_CH_ALL, m2m_wifi_connect(), m2m_wifi_handle_events(), m2m_wifi_init(), MAIN_CHAT_TOPIC, MAIN_CHAT_USER_NAME_SIZE, MAIN_WLAN_AUTH, MAIN_WLAN_PSK, MAIN_WLAN_SSID, mqtt_inst, mqtt_user, mqtt_yield(), nm_bsp_init(), NULL, tstrWifiInitParam::pfAppWifiCb, registerSocketCallback(), socket_event_handler(), socket_resolve_handler(), socketInit(), STRING_HEADER, system_cpu_clock_get_hz(), system_init(), uart_ch_buffer, usart_read_job(), and wifi_callback().

static void mqtt_callback	(	struct mqtt_module *	module_inst,
		int	type,
		union mqtt_data *	data
	)

static

Callback to get the MQTT status update.

Parameters

[in]	conn_id	instance id of connection which is being used.
[in]	type	type of MQTT notification. Possible types are: MQTT_CALLBACK_SOCK_CONNECTED MQTT_CALLBACK_CONNECTED MQTT_CALLBACK_PUBLISHED MQTT_CALLBACK_SUBSCRIBED MQTT_CALLBACK_UNSUBSCRIBED MQTT_CALLBACK_DISCONNECTED MQTT_CALLBACK_RECV_PUBLISH
[in]	data	A structure contains notification informations. mqtt_data

References cdc_uart_module, mqtt_data::connected, MAIN_CHAT_TOPIC, main_mqtt_broker, MQTT_CALLBACK_CONNECTED, MQTT_CALLBACK_DISCONNECTED, MQTT_CALLBACK_SOCK_CONNECTED, MQTT_CONN_RESULT_ACCEPT, mqtt_connect(), mqtt_connect_broker(), mqtt_subscribe(), mqtt_user, NULL, mqtt_data_connected::result, mqtt_data_sock_connected::result, mqtt_data::sock_connected, SubscribeHandler(), USART_CALLBACK_BUFFER_RECEIVED, usart_disable_callback(), and usart_enable_callback().

Referenced by configure_mqtt().

static void socket_event_handler	(	SOCKET	sock,
		uint8_t	msg_type,
		void *	msg_data
	)

static

Callback to get the Socket event.

Parameters

[in]	Socket	descriptor.
[in]	msg_type	type of Socket notification. Possible types are: SOCKET_MSG_CONNECT SOCKET_MSG_BIND SOCKET_MSG_LISTEN SOCKET_MSG_ACCEPT SOCKET_MSG_RECV SOCKET_MSG_SEND SOCKET_MSG_SENDTO SOCKET_MSG_RECVFROM
[in]	msg_data	A structure contains notification informations.

References mqtt_socket_event_handler().

Referenced by main().

static void socket_resolve_handler	(	uint8_t *	doamin_name,
		uint32_t	server_ip
	)

static

Callback of gethostbyname function.

Parameters

[in]	doamin_name	Domain name.
[in]	server_ip	IP of server.

References mqtt_socket_resolve_handler().

Referenced by main().

void SubscribeHandler ( MessageData * msgData )

Prototype for MQTT subscribe Callback.

Callback to receive the subscribed Message.

Parameters

[in] msgData Data to be received.

References MQTTLenString::data, MQTTLenString::len, MQTTString::lenstring, MessageData::message, MQTTMessage::payload, MQTTMessage::payloadlen, and MessageData::topicName.

Referenced by mqtt_callback().

static void uart_callback ( const struct usart_module *const module )

static

Callback of USART input.

Parameters

[in] module USART module structure.

References MAIN_CHAT_BUFFER_SIZE, uart_buffer, uart_buffer_written, and uart_ch_buffer.

Referenced by configure_console().

static void wifi_callback	(	uint8	msg_type,
		void *	msg_data
	)

static

Callback to get the Wi-Fi status update.

Parameters

[in]	msg_type	type of Wi-Fi notification. Possible types are: M2M_WIFI_RESP_CURRENT_RSSI M2M_WIFI_RESP_CON_STATE_CHANGED M2M_WIFI_RESP_CONNTION_STATE M2M_WIFI_RESP_SCAN_DONE M2M_WIFI_RESP_SCAN_RESULT M2M_WIFI_REQ_WPS M2M_WIFI_RESP_IP_CONFIGURED M2M_WIFI_RESP_IP_CONFLICT M2M_WIFI_RESP_P2P M2M_WIFI_RESP_AP M2M_WIFI_RESP_CLIENT_INFO
[in]	pvMsg	A pointer to a buffer containing the notification parameters (if any). It should be casted to the correct data type corresponding to the notification type. Existing types are: tstrM2mWifiStateChanged tstrM2MWPSInfo tstrM2MP2pResp tstrM2MAPResp tstrM2mScanDone tstrM2mWifiscanResult