Component

Component

components/rpc/TCPClient.cpp

@@ -0,0 +1,54 @@
+#include <sys/socket.h>
+
+#include "esp_system.h"
+#include "esp_mac.h"
+#include "esp_netif.h"
+#include "esp_log.h"
+
+#define HOST_IP_ADDR "192.168.0.196"
+#define PORT 3001
+#define TAG "SOCKET"
+
+static const char *payload = "Message from board";
+
+int tcp_client() {
+    char rx_buffer[128];
+    char host_ip[] = HOST_IP_ADDR;
+    int addr_family = AF_INET;
+    int ip_protocol = IPPROTO_IP;
+
+    struct sockaddr_in dest_addr;
+    inet_pton(AF_INET, host_ip, &dest_addr.sin_addr); // Convert ipv4 address to binary
+    dest_addr.sin_family = AF_INET;
+    dest_addr.sin_port = htons(PORT);
+
+    int sock = socket(addr_family, SOCK_STREAM, ip_protocol);
+    if (sock < 0) {
+        ESP_LOGE(TAG, "Failed to create socket: %d", errno);
+        return sock;
+    }
+
+    if (0 != connect(sock, (struct sockaddr *)&dest_addr, sizeof(dest_addr))) {
+        ESP_LOGE(TAG, "Failed to connect: %d", errno);
+    }
+
+    ESP_LOGI(TAG, "Connected");
+
+    while(1) {
+        int err = send(sock, payload, strlen(payload), 0);
+        if (err < 0) {
+            ESP_LOGE(TAG, "Error occurred during sending: %d", errno);
+        }
+
+        int len = recv(sock, rx_buffer, sizeof(rx_buffer) -1, 0); // blocking call
+        if (len < 0) {
+            ESP_LOGE(TAG, "Failed to receive: %d", errno);
+        } else {
+            rx_buffer[len] = 0; // temp: Null terminate to treat as a string
+            ESP_LOGI(TAG, "Received %d bytes", len);
+            ESP_LOGI(TAG, "%s", rx_buffer);
+        }
+
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+}