xTaskCreate((TaskFunction_t)app_tcp_client,
(const char *)"app_tcp_client",
(uint16_t)TCP_SERVER_TASK_STK_SIZE,
(void *)NULL,
(UBaseType_t)TCP_CLIENT_TASK_PRIO,
(TaskHandle_t *)&app_tcp_client_task_handle);
static void app_tcp_client(void *arg)
{
char rx_buffer[128];
char host_ip[] = HOST_IP_ADDR;
int addr_family = 0;
int ip_protocol = 0;
while (1)
{
struct sockaddr_in dest_addr;
inet_pton(AF_INET, host_ip, &dest_addr.sin_addr);
dest_addr.sin_family = AF_INET;
dest_addr.sin_port = htons(CLIENTPORT);
addr_family = AF_INET;
ip_protocol = IPPROTO_IP;
int sock = socket(addr_family, SOCK_STREAM, ip_protocol);
if (sock < 0) {
ESP_LOGE(TAG, "Unable to create socket: errno %d", errno);
break;
}
ESP_LOGI(TAG, "Socket created, connecting to %s:%d", host_ip, CLIENTPORT);
int err = connect(sock, (struct sockaddr *)&dest_addr, sizeof(dest_addr));
if (err != 0) {
ESP_LOGE(TAG, "Socket unable to connect: errno %d", errno);
break;
}
ESP_LOGI(TAG, "Successfully connected");
while (1) {
int err = send(sock, payload, strlen(payload), 0);
if (err < 0) {
ESP_LOGE(TAG, "Error occurred during sending: errno %d", errno);
break;
}
int len = recv(sock, rx_buffer, sizeof(rx_buffer) - 1, 0);
// Error occurred during receiving
if (len < 0) {
ESP_LOGE(TAG, "recv failed: errno %d", errno);
break;
}
// Data received
else {
rx_buffer[len] = 0; // Null-terminate whatever we received and treat like a string
ESP_LOGI(TAG, "Received %d bytes from %s:", len, host_ip);
ESP_LOGI(TAG, "%s", rx_buffer);
}
}
if (sock != -1) {
ESP_LOGE(TAG, "Shutting down socket and restarting...");
shutdown(sock, 0);
close(sock);
}
}
}