esp_modem: Moved to component folder

components/esp_modem/examples/linux_modem/main/modem_main.cpp

@@ -0,0 +1,65 @@
+#include <memory>
+#include <cassert>
+#include <unistd.h>
+#include <esp_log.h>
+#include "cxx_include/esp_modem_terminal.hpp"
+#include "cxx_include/esp_modem_api.hpp"
+#include "cxx_include/esp_modem_dte.hpp"
+#include "esp_modem_config.h"
+#include "esp_netif.h"
+
+
+#define CONFIG_EXAMPLE_SIM_PIN "1234"
+
+using namespace esp_modem;
+
+[[maybe_unused]] static const char *TAG = "linux_modem_main";
+
+
+int main()
+{
+
+    // init the DTE
+    esp_modem_dte_config_t dte_config = {
+            .dte_buffer_size = 512,
+            .task_stack_size = 1024,
+            .task_priority = 10,
+            .uart_config = { },
+            .vfs_config = { }
+    };
+    dte_config.vfs_config.dev_name = "/dev/ttyUSB0";
+    dte_config.vfs_config.resource = ESP_MODEM_VFS_IS_UART; // This tells the VFS to init the UART (use termux to setup baudrate, etc.)
+
+    esp_netif_config_t netif_config = {
+            .dev_name = "/dev/net/tun",
+            .if_name = "tun0"
+    };
+    esp_netif_t *tun_netif = esp_netif_new(&netif_config);
+    auto uart_dte = create_vfs_dte(&dte_config);
+
+    esp_modem_dce_config_t dce_config = ESP_MODEM_DCE_DEFAULT_CONFIG("internet");
+
+    auto dce = create_SIM7600_dce(&dce_config, uart_dte, tun_netif);
+    assert(dce != nullptr);
+
+    dce->set_command_mode();
+
+    bool pin_ok = true;
+    if (dce->read_pin(pin_ok) == command_result::OK && !pin_ok) {
+        throw_if_false(dce->set_pin(CONFIG_EXAMPLE_SIM_PIN) == command_result::OK, "Cannot set PIN!");
+        usleep(1000000);
+    }
+    std::string str;
+    dce->set_mode(esp_modem::modem_mode::CMUX_MODE);
+    dce->get_imsi(str);
+    ESP_LOGI(TAG, "Modem IMSI number: %s",str.c_str());
+    dce->get_imei(str);
+    ESP_LOGI(TAG, "Modem IMEI number: %s",str.c_str());
+    dce->get_operator_name(str);
+    ESP_LOGI(TAG, "Operator name: %s",str.c_str());
+
+    dce->set_mode(esp_modem::modem_mode::DATA_MODE);
+
+    usleep(100'000'000);
+    esp_netif_destroy(tun_netif);
+}