CMUX: Fix batch write, add recovery

2025-07-17 20:42:21 +02:00 · 2021-04-15 14:59:30 +02:00
parent d47cb69b20
commit 6065d89e18
13 changed files with 275 additions and 190 deletions
--- a/esp_modem/docs/cxx_api_links.rst
+++ b/esp_modem/docs/cxx_api_links.rst
@ -2,6 +2,9 @@
 - :cpp:func:`esp_modem::DCE::set_pin` 
 - :cpp:func:`esp_modem::DCE::read_pin` 
 - :cpp:func:`esp_modem::DCE::set_echo` 
+- :cpp:func:`esp_modem::DCE::sms_txt_mode` 
+- :cpp:func:`esp_modem::DCE::sms_character_set` 
+- :cpp:func:`esp_modem::DCE::send_sms` 
 - :cpp:func:`esp_modem::DCE::resume_data_mode` 
 - :cpp:func:`esp_modem::DCE::set_pdp_context` 
 - :cpp:func:`esp_modem::DCE::set_command_mode` 
--- a/esp_modem/docs/esp_modem_api_commands.h
+++ b/esp_modem/docs/esp_modem_api_commands.h
@ -1,51 +1,65 @@
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P -CC  -xc -I../include -DGENERATE_DOCS  - | sed -n '1,/DCE command documentation/!p' > c_api.h
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P  -xc -I../include -DGENERATE_DOCS -DGENERATE_RST_LINKS - | sed 's/NL/\n/g' > cxx_api_links.rst
+
+// call parametrs by names for documentation
+
+
 //  --- DCE command documentation starts here ---
 /**
- * @brief Sends the supplied PIN code
- *
- * @param pin Pin
- *
- */ command_result esp_modem_set_pin (const char* pin); /**
+ * @brief Sets the supplied PIN code
+ * @param[in] pin Pin
+ * @return OK, FAIL or TIMEOUT
+ */command_result esp_modem_set_pin (const char* pin); /**
 * @brief Checks if the SIM needs a PIN
- *
- * @param[out] pin_ok Pin
+ * @param[out] pin_ok true if the SIM card doesn't need a PIN to unlock
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_read_pin (bool* pin_ok); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result esp_modem_set_echo (const bool x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Sets echo mode
+ * @param[in] echo_on true if echo mode on (repeats the commands)
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_set_echo (const bool echo_on); /**
+ * @brief Sets the Txt or Pdu mode for SMS (only txt is supported)
+ * @param[in] txt true if txt mode
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_sms_txt_mode (const bool txt); /**
+ * @brief Sets the default (GSM) charater set
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_sms_character_set (); /**
+ * @brief Sends SMS message in txt mode
+ * @param[in] number Phone number to send the message to
+ * @param[in] message Text message to be sent
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_send_sms (const char* number, const char* message); /**
+ * @brief Resumes data mode (Switches back to th data mode, which was temporarily suspended)
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_resume_data_mode (); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Sets php context
+ * @param[in] x PdP context struct to setup modem cellular connection
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_set_pdp_context (struct PdpContext* x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Switches to the command mode
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_set_command_mode (); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Switches to the CMUX mode
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_set_cmux (); /**
+ * @brief Reads the IMSI number
+ * @param[out] imsi Module's IMSI number
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_get_imsi (char* imsi); /**
+ * @brief Reads the IMEI number
+ * @param[out] imei Module's IMEI number
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_get_imei (char* imei); /**
 * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result esp_modem_get_imsi (char* x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result esp_modem_get_imei (char* x); /**
- * @brief Reads the module name
- *
 * @param[out] name module name
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_get_module_name (char* name); /**
 * @brief Sets the modem to data mode
- *
+ * @return OK, FAIL or TIMEOUT
 */ command_result esp_modem_set_data_mode (); /**
 * @brief Get Signal quality
- *
- */ command_result esp_modem_get_signal_quality (int* x, int* y);
+ * @param[out] rssi signal strength indication
+ * @param[out] ber channel bit error rate
+ * @return OK, FAIL or TIMEOUT
+ */ command_result esp_modem_get_signal_quality (int* rssi, int* ber);
--- a/esp_modem/docs/esp_modem_dce.hpp
+++ b/esp_modem/docs/esp_modem_dce.hpp
@ -1,5 +1,9 @@
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P -CC  -xc -I../include -DGENERATE_DOCS  - | sed -n '1,/DCE command documentation/!p' > c_api.h
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P  -xc -I../include -DGENERATE_DOCS -DGENERATE_RST_LINKS - | sed 's/NL/\n/g' > cxx_api_links.rst
+
+// call parametrs by names for documentation
+
+
 //  --- DCE command documentation starts here ---

 class esp_modem::DCE: public DCE_T<GenericModule> {
@ -13,51 +17,61 @@ public:


 /**
- * @brief Sends the supplied PIN code
- *
- * @param pin Pin
- *
- */ command_result set_pin (const std::string& pin); /**
+ * @brief Sets the supplied PIN code
+ * @param[in] pin Pin
+ * @return OK, FAIL or TIMEOUT
+ */command_result set_pin (const std::string& pin); /**
 * @brief Checks if the SIM needs a PIN
- *
- * @param[out] pin_ok Pin
+ * @param[out] pin_ok true if the SIM card doesn't need a PIN to unlock
+ * @return OK, FAIL or TIMEOUT
 */ command_result read_pin (bool& pin_ok); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result set_echo (const bool x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Sets echo mode
+ * @param[in] echo_on true if echo mode on (repeats the commands)
+ * @return OK, FAIL or TIMEOUT
+ */ command_result set_echo (const bool echo_on); /**
+ * @brief Sets the Txt or Pdu mode for SMS (only txt is supported)
+ * @param[in] txt true if txt mode
+ * @return OK, FAIL or TIMEOUT
+ */ command_result sms_txt_mode (const bool txt); /**
+ * @brief Sets the default (GSM) charater set
+ * @return OK, FAIL or TIMEOUT
+ */ command_result sms_character_set (); /**
+ * @brief Sends SMS message in txt mode
+ * @param[in] number Phone number to send the message to
+ * @param[in] message Text message to be sent
+ * @return OK, FAIL or TIMEOUT
+ */ command_result send_sms (const std::string& number, const std::string& message); /**
+ * @brief Resumes data mode (Switches back to th data mode, which was temporarily suspended)
+ * @return OK, FAIL or TIMEOUT
 */ command_result resume_data_mode (); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Sets php context
+ * @param[in] x PdP context struct to setup modem cellular connection
+ * @return OK, FAIL or TIMEOUT
 */ command_result set_pdp_context (PdpContext& x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Switches to the command mode
+ * @return OK, FAIL or TIMEOUT
 */ command_result set_command_mode (); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
+ * @brief Switches to the CMUX mode
+ * @return OK, FAIL or TIMEOUT
 */ command_result set_cmux (); /**
+ * @brief Reads the IMSI number
+ * @param[out] imsi Module's IMSI number
+ * @return OK, FAIL or TIMEOUT
+ */ command_result get_imsi (std::string& imsi); /**
+ * @brief Reads the IMEI number
+ * @param[out] imei Module's IMEI number
+ * @return OK, FAIL or TIMEOUT
+ */ command_result get_imei (std::string& imei); /**
 * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result get_imsi (std::string& x); /**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ command_result get_imei (std::string& x); /**
- * @brief Reads the module name
- *
 * @param[out] name module name
+ * @return OK, FAIL or TIMEOUT
 */ command_result get_module_name (std::string& name); /**
 * @brief Sets the modem to data mode
- *
+ * @return OK, FAIL or TIMEOUT
 */ command_result set_data_mode (); /**
 * @brief Get Signal quality
- *
- */ command_result get_signal_quality (int& x, int& y);
+ * @param[out] rssi signal strength indication
+ * @param[out] ber channel bit error rate
+ * @return OK, FAIL or TIMEOUT
+ */ command_result get_signal_quality (int& rssi, int& ber);
 };
--- a/esp_modem/examples/simple_cxx_client/main/simple_client.cpp
+++ b/esp_modem/examples/simple_cxx_client/main/simple_client.cpp
@ -24,7 +24,7 @@ using namespace esp_modem;

 static const char *TAG = "cmux_example";

-static EventGroupHandle_t event_group = NULL;
+static EventGroupHandle_t event_group = nullptr;
 static const int CONNECT_BIT = BIT0;
 static const int STOP_BIT = BIT1;
 static const int GOT_DATA_BIT = BIT2;
@ -141,6 +141,17 @@ extern "C" void app_main(void)
    assert(esp_netif);

    auto dce = create_SIM7600_dce(&dce_config, uart_dte, esp_netif);
+    /// TEST
+    {
+//        std::string str;
+//        dce->set_mode(esp_modem::modem_mode::CMUX_MODE);
+//        while (1) {
+//            dce->get_imsi(str);
+//            std::cout << "Modem IMSI number:" << str << "|" << std::endl;
+//        }
+    }
+//    return;
+    //// TEST
    dce->set_command_mode();

    std::string str;
@ -163,7 +174,7 @@ extern "C" void app_main(void)
    esp_mqtt_client_config_t mqtt_config = { };
    mqtt_config.uri = BROKER_URL;
    esp_mqtt_client_handle_t mqtt_client = esp_mqtt_client_init(&mqtt_config);
-    esp_mqtt_client_register_event(mqtt_client, MQTT_EVENT_ANY, mqtt_event_handler, NULL);
+    esp_mqtt_client_register_event(mqtt_client, MQTT_EVENT_ANY, mqtt_event_handler, nullptr);
    esp_mqtt_client_start(mqtt_client);

    EventBits_t got_data = 0;
@ -173,13 +184,11 @@ extern "C" void app_main(void)
        got_data = xEventGroupWaitBits(event_group, GOT_DATA_BIT, pdTRUE, pdTRUE, pdMS_TO_TICKS(500));
    }
    esp_mqtt_client_destroy(mqtt_client);
+    dce->get_imsi(str);
+    std::cout << "Modem IMSI number:" << str << "|" << std::endl;
+    vTaskDelay(pdMS_TO_TICKS(1000));

-    while (true) { // reading IMSI number after
-        dce->get_imsi(str);
-        std::cout << "Modem IMSI number:" << str << "|" << std::endl;
-        vTaskDelay(pdMS_TO_TICKS(1000));
-    }
-
+    ESP_LOGI(TAG, "Example finished");
 }


--- a/esp_modem/include/cxx_include/esp_modem_command_library.hpp
+++ b/esp_modem/include/cxx_include/esp_modem_command_library.hpp
@ -34,7 +34,7 @@ namespace dce_commands {
 /**
 * @brief Declaration of all commands is generated from esp_modem_command_declare.inc
 */
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) \
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, num, ...) \
        return_type name(CommandableIf *t, ## __VA_ARGS__);

        DECLARE_ALL_COMMAND_APIS(declare name(Commandable *p, ...);)
--- a/esp_modem/include/cxx_include/esp_modem_dce.hpp
+++ b/esp_modem/include/cxx_include/esp_modem_dce.hpp
@ -95,7 +95,7 @@ class DCE: public DCE_T<GenericModule> {
 public:

    using DCE_T<GenericModule>::DCE_T;
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) \
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, num, ...) \
    template <typename ...Agrs> \
    return_type name(Agrs&&... args)   \
    {   \
--- a/esp_modem/include/cxx_include/esp_modem_dce_module.hpp
+++ b/esp_modem/include/cxx_include/esp_modem_dce_module.hpp
@ -71,7 +71,7 @@ public:
    }


-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) \
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, num, ...) \
    virtual return_type name(__VA_ARGS__);

    DECLARE_ALL_COMMAND_APIS(virtual return_type name(...); )
--- a/esp_modem/include/esp_modem_api.h
+++ b/esp_modem/include/esp_modem_api.h
@ -23,7 +23,7 @@ extern "C" {
 #endif


-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) \
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, num, ...) \
        esp_err_t esp_modem_ ## name(esp_modem_dce_t *dce, ##__VA_ARGS__);

 DECLARE_ALL_COMMAND_APIS(declares esp_modem_<API>(esp_modem_t * dce, ...);)
--- a/esp_modem/include/generate/esp_modem_command_declare.inc
+++ b/esp_modem/include/generate/esp_modem_command_declare.inc
@ -15,12 +15,11 @@
 #ifndef _ESP_MODEM_COMMAND_DECLARE_INC_
 #define _ESP_MODEM_COMMAND_DECLARE_INC_

-#if GENERATE_DOCS
-#define _ARG(param, name) name
-#else
-#define _ARG(param, name) param
-#endif

+// Parameters
+// * handle different parameters for C++ and C API
+// * make parameter unique names, so they could be easily referenced and forwarded
+#define _ARG(param, name) param
 #ifdef __cplusplus
 #include <string>
 #define STRING_IN(param, name) const std::string& _ARG(param, name)
@ -39,114 +38,127 @@
 #define STRUCT_OUT(struct_name, x)  struct struct_name* x
 #endif

-#define _ESP_MODEM_COMMAND_DECLARE_INC_
-#define ESP_MODEM_DEFINE_DCE_COMMAND(...) ESP_MODEM_DECLARE_DCE_COMMAND(##__VA_ARGS__)
-#define DEFINE_ALL_COMMAND_APIS() DECLARE_ALL_COMMAND_APIS()
-
 #define DECLARE_ALL_COMMAND_APIS(...) \
 /**
- * @brief Sends the supplied PIN code
- *
- * @param pin Pin
- *
- */ \
-    \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_pin,  command_result, 1, MUX_ARG, STRING_IN(x, pin)) \
-\
+ * @brief Sets the supplied PIN code
+ * @param[in] pin Pin
+ * @return OK, FAIL or TIMEOUT
+ */\
+ESP_MODEM_DECLARE_DCE_COMMAND(set_pin,  command_result, 1, STRING_IN(x, pin)) \
 \
 /**
 * @brief Checks if the SIM needs a PIN
- *
- * @param[out] pin_ok Pin
+ * @param[out] pin_ok true if the SIM card doesn't need a PIN to unlock
+ * @return OK, FAIL or TIMEOUT
 */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(read_pin, command_result, 1, MUX_ARG, BOOL_OUT(x, pin_ok))           \
+ESP_MODEM_DECLARE_DCE_COMMAND(read_pin, command_result, 1, BOOL_OUT(x, pin_ok)) \
+    \
+/**
+ * @brief Sets echo mode
+ * @param[in] echo_on true if echo mode on (repeats the commands)
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(set_echo, command_result, 1, BOOL_IN(x, echo_on)) \
+    \
+/**
+ * @brief Sets the Txt or Pdu mode for SMS (only txt is supported)
+ * @param[in] txt true if txt mode
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(sms_txt_mode, command_result, 1, BOOL_IN(x, txt)) \
+    \
+/**
+ * @brief Sets the default (GSM) charater set
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(sms_character_set, command_result, 0) \
+    \
+/**
+ * @brief Sends SMS message in txt mode
+ * @param[in] number Phone number to send the message to
+ * @param[in] message Text message to be sent
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(send_sms, command_result, 2, STRING_IN(x, number), STRING_IN(y, message)) \
+    \
+/**
+ * @brief Resumes data mode (Switches back to th data mode, which was temporarily suspended)
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(resume_data_mode, command_result, 0) \
+    \
+/**
+ * @brief Sets php context
+ * @param[in] x PdP context struct to setup modem cellular connection
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(set_pdp_context, command_result, 1, STRUCT_OUT(PdpContext, x)) \
+    \
+/**
+ * @brief Switches to the command mode
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(set_command_mode, command_result, 0) \
+    \
+/**
+ * @brief Switches to the CMUX mode
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(set_cmux, command_result, 0) \
+    \
+/**
+ * @brief Reads the IMSI number
+ * @param[out] imsi Module's IMSI number
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(get_imsi, command_result, 1, STRING_OUT(x, imsi)) \
+    \
+/**
+ * @brief Reads the IMEI number
+ * @param[out] imei Module's IMEI number
+ * @return OK, FAIL or TIMEOUT
+ */ \
+ESP_MODEM_DECLARE_DCE_COMMAND(get_imei, command_result, 1, STRING_OUT(x, imei)) \
    \
 /**
 * @brief Reads the module name
- *
 * @param[out] name module name
+ * @return OK, FAIL or TIMEOUT
 */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_echo, command_result, 1, MUX_ARG, BOOL_IN(x, echo_on))           \
-ESP_MODEM_DECLARE_DCE_COMMAND(sms_txt_mode, command_result, 1, MUX_ARG, BOOL_IN(x, txt))           \
-ESP_MODEM_DECLARE_DCE_COMMAND(sms_character_set, command_result, 0, MUX_ARG)           \
-ESP_MODEM_DECLARE_DCE_COMMAND(send_sms, command_result, 2, MUX_ARG, STRING_IN(x, number), STRING_IN(y, message))           \
-                                      \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(resume_data_mode, command_result, 0, MUX_ARG)           \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_pdp_context, command_result, 1, MUX_ARG, STRUCT_OUT(PdpContext, x)) \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_command_mode, command_result, 0, MUX_ARG) \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_cmux, command_result, 0, MUX_ARG) \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(get_imsi, command_result, 1, MUX_ARG, STRING_OUT(x, imsi)) \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(get_imei, command_result, 1, MUX_ARG, STRING_OUT(x, name)) \
-    \
-/**
- * @brief Reads the module name
- *
- * @param[out] name module name
- */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(get_module_name, command_result, 1, MUX_ARG, STRING_OUT(x, name)) \
+ESP_MODEM_DECLARE_DCE_COMMAND(get_module_name, command_result, 1, STRING_OUT(x, name)) \
 \
 /**
 * @brief Sets the modem to data mode
- *
+ * @return OK, FAIL or TIMEOUT
 */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(set_data_mode, command_result, 0, MUX_ARG) \
+ESP_MODEM_DECLARE_DCE_COMMAND(set_data_mode, command_result, 0) \
 \
 /**
 * @brief Get Signal quality
- *
+ * @param[out] rssi signal strength indication
+ * @param[out] ber channel bit error rate
+ * @return OK, FAIL or TIMEOUT
 */ \
-ESP_MODEM_DECLARE_DCE_COMMAND(get_signal_quality, command_result, 2, MUX_ARG, INT_OUT(x, rssi), INT_OUT(y, ber))
+ESP_MODEM_DECLARE_DCE_COMMAND(get_signal_quality, command_result, 2, INT_OUT(x, rssi), INT_OUT(y, ber))

 #ifdef GENERATE_DOCS
 // cat ../include/generate/esp_modem_command_declare.inc | clang++ -E -P -CC  -xc++ -I../include -DGENERATE_DOCS  - | sed -n '1,/DCE command documentation/!p'
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P -CC  -xc -I../include -DGENERATE_DOCS  - | sed -n '1,/DCE command documentation/!p' > c_api.h
 // cat ../include/generate/esp_modem_command_declare.inc | clang -E -P  -xc -I../include -DGENERATE_DOCS -DGENERATE_RST_LINKS - | sed 's/NL/\n/g' > cxx_api_links.rst
+
+// call parametrs by names for documentation
+#undef _ARG
+#define _ARG(param, name) name
 //  --- DCE command documentation starts here ---
 #ifdef __cplusplus
 class esp_modem::DCE: public DCE_T<GenericModule> {
 public:
    using DCE_T<GenericModule>::DCE_T;
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) return_type name (__VA_ARGS__);
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, ...) return_type name (__VA_ARGS__);
 #elif defined(GENERATE_RST_LINKS)
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) NL- :cpp:func:`esp_modem::DCE::name`
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, ...) NL- :cpp:func:`esp_modem::DCE::name`
 #else
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, MUX_ARG, ...) return_type esp_modem_ ## name (__VA_ARGS__);
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, TEMPLATE_ARG, ...) return_type esp_modem_ ## name (__VA_ARGS__);
 #endif

 DECLARE_ALL_COMMAND_APIS()
--- a/esp_modem/src/esp_modem_api.cpp
+++ b/esp_modem/src/esp_modem_api.cpp
@ -18,10 +18,8 @@
 #include "esp_log.h"
 #include "cxx_include/esp_modem_api.hpp"
 #include "cxx_include/esp_modem_dce_factory.hpp"
-#include "esp_modem_c_api_types.h"
 #include "esp_modem_config.h"
 #include "exception_stub.hpp"
-#include "cstring"

 namespace esp_modem {

--- a/esp_modem/src/esp_modem_cmux.cpp
+++ b/esp_modem/src/esp_modem_cmux.cpp
@ -103,24 +103,43 @@ bool CMux::on_cmux(uint8_t *data, size_t actual_len)
    }
    ESP_LOG_BUFFER_HEXDUMP("Received", data, actual_len, ESP_LOG_DEBUG);
    uint8_t* frame = data;
+    uint8_t* recover_ptr;
    auto available_len = actual_len;
    size_t payload_offset = 0;
    size_t footer_offset = 0;
    while (available_len > 0) {
        switch (state) {
            case cmux_state::RECOVER:
-                // TODO: Implement recovery, looking for SOF_MARKER's
-                break;
+                if (frame[0] == SOF_MARKER) {
+                    // already init state
+                    state = cmux_state::INIT;
+                    break;
+                }
+                recover_ptr = static_cast<uint8_t*>(memchr(frame, SOF_MARKER, available_len));
+                if (recover_ptr && available_len > recover_ptr - frame) {
+                    available_len -= (recover_ptr - frame);
+                    frame = recover_ptr;
+                    state = cmux_state::INIT;
+                    ESP_LOGD("CMUX", "Protocol recovered");
+                    if (available_len > 1 && frame[1] == SOF_MARKER) {
+                        // empty frame
+                        available_len -= 1;
+                        frame += 1;
+                    }
+                    break;
+                }
+                // marker not found, continue with recovery
+                return false;
            case cmux_state::INIT:
                if (frame[0] != SOF_MARKER) {
-                    ESP_LOGW("CMUX", "TODO: Recover!");
-                    return true;
+                    ESP_LOGI("CMUX", "Protocol mismatch!");
+                    state = cmux_state::RECOVER;
+                    break;
                }
                if (available_len > 1 && frame[1] == SOF_MARKER) {
-                    ESP_LOGI("CMUX", "Empty frame");
                    // empty frame
-                    available_len -= 2;
-                    frame += 2;
+                    available_len -= 1;
+                    frame += 1;
                    break;
                }
                state = cmux_state::HEADER;
@ -140,7 +159,7 @@ bool CMux::on_cmux(uint8_t *data, size_t actual_len)
                dlci = frame_header[1] >> 2;
                type = frame_header[2];
                payload_len = (frame_header[3] >> 1);
-                ESP_LOGI("CMUX", "CMUX FR: A:%02x T:%02x L:%d", dlci, type, payload_len);
+                ESP_LOGD("CMUX", "CMUX FR: A:%02x T:%02x L:%d", dlci, type, payload_len);
                frame += payload_offset;
                available_len -= payload_offset;
                state = cmux_state::PAYLOAD;
@ -169,8 +188,9 @@ bool CMux::on_cmux(uint8_t *data, size_t actual_len)
                    footer_offset = std::min(available_len, 6 - frame_header_offset);
                    memcpy(frame_header + frame_header_offset, frame, footer_offset);
                    if (frame_header[5] != SOF_MARKER) {
-                        ESP_LOGW("CMUX", "TODO: Recover!");
-                        return true;
+                        ESP_LOGI("CMUX", "Protocol mismatch!");
+                        state = cmux_state::RECOVER;
+                        break;
                    }
                    if (payload_len == 0) {
                        data_available(frame_header, 0); // Null payload
@ -190,6 +210,7 @@ void CMux::init()
    frame_header_offset = 0;
    state = cmux_state::INIT;
    term->set_read_cb([this](uint8_t *data, size_t len) {
+        Scoped<Lock> l(lock);
        this->on_cmux(data, len);
        return false;
    });
@ -203,22 +224,31 @@ void CMux::init()

 int CMux::write(int virtual_term, uint8_t *data, size_t len)
 {
+    const size_t cmux_max_len = 127;
    Scoped<Lock> l(lock);
    int i = virtual_term + 1;
-    uint8_t frame[6];
-    frame[0] = SOF_MARKER;
-    frame[1] = (i << 2) + 1;
-    frame[2] = FT_UIH;
-    frame[3] = (len << 1) + 1;
-    frame[4] = 0xFF - fcs_crc(frame);
-    frame[5] = SOF_MARKER;
+    size_t need_write = len;
+    while (need_write > 0) {
+        size_t batch_len = need_write;
+        if (batch_len > cmux_max_len)
+            batch_len = cmux_max_len;
+        uint8_t frame[6];
+        frame[0] = SOF_MARKER;
+        frame[1] = (i << 2) + 1;
+        frame[2] = FT_UIH;
+        frame[3] = (batch_len << 1) + 1;
+        frame[4] = 0xFF - fcs_crc(frame);
+        frame[5] = SOF_MARKER;

-    term->write(frame, 4);
-    term->write(data, len);
-    term->write(frame + 4, 2);
-    ESP_LOG_BUFFER_HEXDUMP("Send", frame, 4, ESP_LOG_VERBOSE);
-    ESP_LOG_BUFFER_HEXDUMP("Send", data, len, ESP_LOG_VERBOSE);
-    ESP_LOG_BUFFER_HEXDUMP("Send", frame+4, 2, ESP_LOG_VERBOSE);
+        term->write(frame, 4);
+        term->write(data, batch_len);
+        term->write(frame + 4, 2);
+        ESP_LOG_BUFFER_HEXDUMP("Send", frame, 4, ESP_LOG_VERBOSE);
+        ESP_LOG_BUFFER_HEXDUMP("Send", data, batch_len, ESP_LOG_VERBOSE);
+        ESP_LOG_BUFFER_HEXDUMP("Send", frame+4, 2, ESP_LOG_VERBOSE);
+        need_write -= batch_len;
+        data += batch_len;
+    }
    return len;
 }

--- a/esp_modem/src/esp_modem_modules.cpp
+++ b/esp_modem/src/esp_modem_modules.cpp
@ -28,7 +28,7 @@ GenericModule::GenericModule(std::shared_ptr<DTE> dte, const dce_config *config)
 #define _ARGS(x)  ARGS ## x
 #define ARGS(x)  _ARGS(x)
 #define TEMPLATE_ARG
-#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, arg_nr, MUX_ARG, ...) \
+#define ESP_MODEM_DECLARE_DCE_COMMAND(name, return_type, arg_nr, ...) \
     return_type GenericModule::name(__VA_ARGS__) { return esp_modem::dce_commands::name(dte.get() ARGS(arg_nr) ); }

 DECLARE_ALL_COMMAND_APIS(return_type name(...) {
--- a/esp_modem/src/esp_modem_netif.cpp
+++ b/esp_modem/src/esp_modem_netif.cpp
@ -95,6 +95,11 @@ void Netif::stop() {
 }

 Netif::~Netif() {
+    if (signal.is_any(PPP_STARTED)) {
+        esp_netif_action_stop(driver.base.netif, nullptr, 0, nullptr);
+        signal.clear(PPP_STARTED);
+        signal.wait(PPP_EXIT, 30000);
+    }
    esp_event_handler_unregister(NETIF_PPP_STATUS, ESP_EVENT_ANY_ID, &on_ppp_changed);
    esp_event_handler_unregister(IP_EVENT, IP_EVENT_PPP_GOT_IP, esp_netif_action_connected);
    esp_event_handler_unregister(IP_EVENT, IP_EVENT_PPP_LOST_IP, esp_netif_action_disconnected);