sketching up the command library

esp_modem/src/esp_modem_commands.cpp

@@ -0,0 +1,36 @@
+#include "cxx_include/esp_modem_commands.hpp"
+#include "cxx_include/esp_modem_dte.hpp"
+#include <string>
+#include <utility>
+
+namespace esp_modem::dce_commands {
+
+template <typename T> esp_err_t sync(T t)
+{
+    return t->send_command("AT\r", [&](uint8_t *data, size_t len) {
+        std::string response((char*)data, len);
+        if (response.find("OK") != std::string::npos) {
+            return ESP_OK;
+        } else if (response.find("ERROR") != std::string::npos) {
+            return ESP_FAIL;
+        }
+        return ESP_ERR_INVALID_STATE;
+    }, 1000);
+}
+
+}
+
+namespace esp_modem {
+
+template <class T>
+class generic_dce {
+public:
+    explicit generic_dce(std::shared_ptr<dte> e) : dce_dte(std::move(e)) {}
+
+    esp_err_t sync() { return dce_commands::sync(dce_dte); }
+
+private:
+    std::shared_ptr<T> dce_dte;
+};
+
+}