feat(modem): DTE to support sending and receiving raw data

MAJOR CHANGE: Enable DTE to redefine on_read() and write(cmd) directly

components/esp_modem/include/cxx_include/esp_modem_command_library.hpp

@@ -22,6 +22,19 @@ namespace dce_commands {
  * @{
  */
 
+/**
+ * @brief Generic AT command to be send with pass and fail phrases
+ *
+ * @param t Commandable object (anything that can accept commands)
+ * @param command Command to be sent do the commandable object
+ * @param pass_phrase String to be present in the reply to pass this command
+ * @param fail_phrase String to be present in the reply to fail this command
+ * @param timeout_ms Timeout in ms
+ */
+command_result generic_command(CommandableIf *t, const std::string &command,
+                               const std::string &pass_phrase,
+                               const std::string &fail_phrase, uint32_t timeout_ms);
+
 /**
  * @brief Declaration of all commands is generated from esp_modem_command_declare.inc
  */

components/esp_modem/include/cxx_include/esp_modem_dce_factory.hpp

@@ -69,6 +69,10 @@ public:
         ESP_MODEM_THROW_IF_FALSE(netif != nullptr, "Null netif");
     }
 
+    explicit Creator(std::shared_ptr<DTE> dte): dte(std::move(dte)), device(nullptr), netif(nullptr)
+    {
+    }
+
     ~Creator()
     {
         if (device != nullptr) {

components/esp_modem/include/cxx_include/esp_modem_dte.hpp

@@ -29,6 +29,13 @@ class CMux;
 * @{
 */
 
+struct DTE_Command {
+    DTE_Command(const std::string &cmd): data((uint8_t *)cmd.c_str()), len(cmd.length()) {}
+
+    uint8_t *data;
+    size_t len;
+};
+
 /**
  * DTE (Data Terminal Equipment) class
  */
@@ -54,7 +61,9 @@ public:
      * @param len Data len to write
      * @return number of bytes written
      */
-    int write(uint8_t *data, size_t len);
+    int write(uint8_t *data, size_t len) override;
+
+    int write(DTE_Command command);
 
     /**
      * @brief Reading from the underlying terminal
@@ -70,6 +79,8 @@ public:
      */
     void set_read_cb(std::function<bool(uint8_t *data, size_t len)> f);
 
+    void on_read(got_line_cb on_data) override;
+
     /**
      * @brief Sets DTE error callback
      * @param f Function to be called on DTE error

components/esp_modem/include/cxx_include/esp_modem_types.hpp

@@ -80,6 +80,9 @@ public:
      */
     virtual command_result command(const std::string &command, got_line_cb got_line, uint32_t time_ms, const char separator) = 0;
     virtual command_result command(const std::string &command, got_line_cb got_line, uint32_t time_ms) = 0;
+
+    virtual int write(uint8_t *data, size_t len) = 0;
+    virtual void on_read(got_line_cb on_data) = 0;
 };
 
 /**