diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55f80932..3ecab55a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -248,10 +248,11 @@ if(DEFINED PICO_BOARD OR PIP_FREERTOS)
 		if(NOT DEFINED PICO_FREERTOS)
 			set(PIP_HAS_THREADS OFF CACHE BOOL "" FORCE)
 		endif()
-		if(NOT DEFINED PICO_LWIP)
-			set(PIP_HAS_SOCKET OFF CACHE BOOL "" FORCE)
-			set(PIP_BUILD_MQTT_CLIENT OFF CACHE BOOL "" FORCE)
-		endif()
+		# pico-sdk lwip provides only a partial POSIX socket layer (no netinet/in.h,
+		# poll.h), so PIEthernet/PICAN and the paho.mqtt.c library cannot be built
+		# on Pico yet; keep sockets off by default
+		set(PIP_HAS_SOCKET OFF CACHE BOOL "" FORCE)
+		set(PIP_BUILD_MQTT_CLIENT OFF CACHE BOOL "" FORCE)
 		message(STATUS "Building PIP for Pi Pico SDK ${PICO_SDK_VERSION_STRING}")
 	else()
 		if(NOT DEFINED LWIP)
@@ -278,6 +279,18 @@ if(NOT PIP_HAS_THREADS)
 		message(STATUS "INTROSPECTION requires PIP_HAS_THREADS, disabling INTROSPECTION")
 		set(INTROSPECTION OFF CACHE BOOL "" FORCE)
 	endif()
+	if(PIP_BUILD_CONSOLE)
+		message(STATUS "PIP_BUILD_CONSOLE requires PIP_HAS_THREADS, disabling PIP_BUILD_CONSOLE")
+		set(PIP_BUILD_CONSOLE OFF CACHE BOOL "" FORCE)
+	endif()
+	if(PIP_BUILD_CLOUD)
+		message(STATUS "PIP_BUILD_CLOUD requires PIP_HAS_THREADS and PIP_HAS_SOCKET, disabling PIP_BUILD_CLOUD")
+		set(PIP_BUILD_CLOUD OFF CACHE BOOL "" FORCE)
+	endif()
+endif()
+if(PIP_BUILD_CLOUD AND NOT PIP_HAS_SOCKET)
+	message(STATUS "PIP_BUILD_CLOUD requires PIP_HAS_SOCKET, disabling PIP_BUILD_CLOUD")
+	set(PIP_BUILD_CLOUD OFF CACHE BOOL "" FORCE)
 endif()
 
 if(PIP_HAS_FILESYSTEM)
diff --git a/libs/main/application/pitranslator.h b/libs/main/application/pitranslator.h
index 432b1f79..c611e49e 100644
--- a/libs/main/application/pitranslator.h
+++ b/libs/main/application/pitranslator.h
@@ -5,7 +5,7 @@
 //! \~russian Поддержка перевода
 /*
     PIP - Platform Independent Primitives
-	Translation support
+    Translation support
     Ivan Pelipenko peri4ko@yandex.ru
 
     This program is free software: you can redistribute it and/or modify
@@ -107,6 +107,22 @@ private:
 	static PITranslator * instance();
 };
 
+#ifndef PIP_HAS_FILESYSTEM
+// no-filesystem build: translations cannot be loaded from disk, all strings pass through unchanged
+inline PIString PITranslator::tr(const PIString & in, const PIString &) {
+	return in;
+}
+inline void PITranslator::clear() {}
+inline void PITranslator::loadLang(const PIString &, PIString) {}
+inline void PITranslator::loadConfig(const PIString &) {}
+inline bool PITranslator::load(const PIByteArray &) {
+	return false;
+}
+inline bool PITranslator::loadFile(const PIString &) {
+	return false;
+}
+#endif // PIP_HAS_FILESYSTEM
+
 
 //! \~\ingroup Application
 //! \~\brief
diff --git a/libs/main/cloud/picloudbase.h b/libs/main/cloud/picloudbase.h
index 6525348b..4d0c4086 100644
--- a/libs/main/cloud/picloudbase.h
+++ b/libs/main/cloud/picloudbase.h
@@ -33,6 +33,7 @@
 //! \brief
 //! \~english Base class for cloud client and server.
 //! \~russian Базовый класс для облачного клиента и сервера.
+#if defined(PIP_HAS_SOCKET) && defined(PIP_HAS_THREADS)
 class PIP_CLOUD_EXPORT PICloudBase {
 public:
 	//! \~english Constructs the shared PICloud transport state.
@@ -48,5 +49,6 @@ protected:
 	PIStreamPacker streampacker;
 	PICloud::TCP tcp;
 };
+#endif // PIP_HAS_SOCKET && PIP_HAS_THREADS
 
 #endif // PICLOUDBASE_H
diff --git a/libs/main/cloud/picloudclient.h b/libs/main/cloud/picloudclient.h
index 5214324c..96f317fa 100644
--- a/libs/main/cloud/picloudclient.h
+++ b/libs/main/cloud/picloudclient.h
@@ -32,6 +32,7 @@
 //! \~\brief
 //! \~english %PIIODevice implementation for a logical PICloud client.
 //! \~russian Реализация %PIIODevice для логического клиента PICloud.
+#if defined(PIP_HAS_SOCKET) && defined(PIP_HAS_THREADS)
 class PIP_CLOUD_EXPORT PICloudClient
 	: public PIIODevice
 	, public PICloudBase {
@@ -102,5 +103,6 @@ private:
 	std::atomic_bool is_connected;
 	std::atomic_bool is_deleted;
 };
+#endif // PIP_HAS_SOCKET && PIP_HAS_THREADS
 
 #endif // PICLOUDCLIENT_H
diff --git a/libs/main/cloud/picloudserver.h b/libs/main/cloud/picloudserver.h
index 7b97fa16..13ec48ec 100644
--- a/libs/main/cloud/picloudserver.h
+++ b/libs/main/cloud/picloudserver.h
@@ -32,6 +32,7 @@
 //! \~\brief
 //! \~english %PIIODevice implementation for a logical PICloud server.
 //! \~russian Реализация %PIIODevice для логического сервера PICloud.
+#if defined(PIP_HAS_SOCKET) && defined(PIP_HAS_THREADS)
 class PIP_CLOUD_EXPORT PICloudServer
 	: public PIIODevice
 	, public PICloudBase {
@@ -127,5 +128,6 @@ private:
 	mutable PIMutex clients_mutex;
 	std::atomic_bool is_deleted;
 };
+#endif // PIP_HAS_SOCKET && PIP_HAS_THREADS
 
 #endif // PICLOUDSERVER_H
diff --git a/libs/main/cloud/picloudtcp.h b/libs/main/cloud/picloudtcp.h
index a0e0563a..1ae5149e 100644
--- a/libs/main/cloud/picloudtcp.h
+++ b/libs/main/cloud/picloudtcp.h
@@ -43,13 +43,14 @@ namespace PICloud {
 //! \~\brief
 //! \~english Builds and parses PICloud frames on top of %PIStreamPacker.
 //! \~russian Формирует и разбирает кадры PICloud поверх %PIStreamPacker.
+#if defined(PIP_HAS_SOCKET) && defined(PIP_HAS_THREADS)
 class PIP_CLOUD_EXPORT TCP {
 public:
 	//! \~english Supported PICloud frame versions.
 	//! \~russian Поддерживаемые версии кадров PICloud.
 	enum Version {
 		Version_1 = 1 /** \~english First protocol version \~russian Первая версия протокола */,
-		Version_2 = 2  /** \~english Current protocol version \~russian Текущая версия протокола */
+		Version_2 = 2 /** \~english Current protocol version \~russian Текущая версия протокола */
 	};
 
 	//! \~english Logical destination role of a PICloud frame.
@@ -64,10 +65,10 @@ public:
 	//! \~russian Вид полезной нагрузки кадра PICloud.
 	enum Type {
 		InvalidType = 0 /** \~english Invalid or unknown frame \~russian Некорректный или неизвестный кадр */,
-		Connect     = 1 /** \~english Connect or registration frame \~russian Кадр подключения или регистрации */,
-		Disconnect  = 2 /** \~english Disconnect notification frame \~russian Кадр уведомления об отключении */,
-		Data        = 3 /** \~english Payload data frame \~russian Кадр с полезными данными */,
-		Ping        = 4  /** \~english Keepalive frame \~russian Кадр поддержания соединения */
+		Connect = 1 /** \~english Connect or registration frame \~russian Кадр подключения или регистрации */,
+		Disconnect = 2 /** \~english Disconnect notification frame \~russian Кадр уведомления об отключении */,
+		Data       = 3 /** \~english Payload data frame \~russian Кадр с полезными данными */,
+		Ping       = 4 /** \~english Keepalive frame \~russian Кадр поддержания соединения */
 	};
 
 
@@ -154,6 +155,7 @@ private:
 	PIStreamPacker * streampacker;
 	PIMutex mutex_send;
 };
+#endif // PIP_HAS_SOCKET && PIP_HAS_THREADS
 
 } // namespace PICloud
 
diff --git a/libs/main/console/pikbdlistener.cpp b/libs/main/console/pikbdlistener.cpp
index 7ebefe6b..1b339db9 100644
--- a/libs/main/console/pikbdlistener.cpp
+++ b/libs/main/console/pikbdlistener.cpp
@@ -18,7 +18,7 @@
 */
 #include "pikbdlistener.h"
 
-#ifdef PIP_HAS_THREADS
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 
 #  include "piincludes_p.h"
 #  include "piliterals.h"
diff --git a/libs/main/console/pikbdlistener.h b/libs/main/console/pikbdlistener.h
index 42987a61..b278192b 100644
--- a/libs/main/console/pikbdlistener.h
+++ b/libs/main/console/pikbdlistener.h
@@ -27,7 +27,7 @@
 
 #include "pibase.h"
 
-#ifdef PIP_HAS_THREADS
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 
 #  include "pithread.h"
 #  include "pitime.h"
diff --git a/libs/main/console/piscreen.h b/libs/main/console/piscreen.h
index f55a7a6c..5d54a9f1 100644
--- a/libs/main/console/piscreen.h
+++ b/libs/main/console/piscreen.h
@@ -34,6 +34,7 @@
 //! \~\brief
 //! \~english Console screen manager with tile layout, drawing, and input routing.
 //! \~russian Менеджер консольного экрана с раскладкой тайлов, отрисовкой и маршрутизацией ввода.
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 class PIP_CONSOLE_EXPORT PIScreen
 	: public PIThread
 	, public PIScreenTypes::PIScreenBase {
@@ -214,6 +215,7 @@ private:
 	PIScreenTile root;
 	PIScreenTile *tile_focus, *tile_dialog;
 };
+#endif // PIP_HAS_THREADS
 
 
 #endif // PISCREEN_H
diff --git a/libs/main/console/piscreentile.h b/libs/main/console/piscreentile.h
index 235fb809..8de21559 100644
--- a/libs/main/console/piscreentile.h
+++ b/libs/main/console/piscreentile.h
@@ -38,6 +38,7 @@ class PIScreenDrawer;
 //! \details
 //! \~english Base class for all screen tiles providing layout and event handling.
 //! \~russian Базовый класс для всех экранных тайлов, обеспечивающий компоновку и обработку событий.
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 class PIP_CONSOLE_EXPORT PIScreenTile: public PIObject {
 	friend class PIScreen;
 	PIOBJECT_SUBCLASS(PIScreenTile, PIObject);
@@ -237,6 +238,7 @@ protected:
 private:
 	int pw, ph;
 };
+#endif // PIP_HAS_THREADS
 
 
 #endif // PISCREENTILE_H
diff --git a/libs/main/console/piscreentiles.h b/libs/main/console/piscreentiles.h
index 2bc31f8d..d4b36473 100644
--- a/libs/main/console/piscreentiles.h
+++ b/libs/main/console/piscreentiles.h
@@ -36,6 +36,7 @@
 //! \~\brief
 //! \~english Simple text tile with per-row formatting.
 //! \~russian Простой текстовый тайл с форматированием по строкам.
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 class PIP_CONSOLE_EXPORT TileSimple: public PIScreenTile {
 	PIOBJECT_SUBCLASS(TileSimple, PIScreenTile);
 
@@ -147,7 +148,8 @@ public:
 	//! \~russian События, генерируемые тайлом списка.
 	enum EventType {
 		SelectionChanged /** \~english Selection set changed. \~russian Изменился набор выбранных строк. */,
-		RowPressed /** \~english Current row was activated; event data stores the row index. \~russian Текущая строка была активирована; данные события содержат индекс строки. */
+		RowPressed /** \~english Current row was activated; event data stores the row index. \~russian Текущая строка была активирована;
+		              данные события содержат индекс строки. */
 	};
 
 	//! \~english Constructs a list tile with the specified selection mode.
@@ -259,7 +261,8 @@ public:
 	//! \~english Events emitted by the button group.
 	//! \~russian События, генерируемые группой кнопок.
 	enum EventType {
-		ButtonSelected /** \~english A button was selected; event data stores the button index. \~russian Кнопка была выбрана; данные события содержат индекс кнопки. */
+		ButtonSelected /** \~english A button was selected; event data stores the button index. \~russian Кнопка была выбрана; данные
+		                  события содержат индекс кнопки. */
 	};
 
 	//! \~english Button caption with cell format.
@@ -310,7 +313,8 @@ public:
 	//! \~english Events emitted by the check box.
 	//! \~russian События, генерируемые флажком.
 	enum EventType {
-		Toggled /** \~english Check state changed; event data stores the new boolean value. \~russian Состояние флажка изменилось; данные события содержат новое логическое значение. */
+		Toggled /** \~english Check state changed; event data stores the new boolean value. \~russian Состояние флажка изменилось; данные
+		           события содержат новое логическое значение. */
 	};
 
 	//! \~english Text format of the caption.
@@ -442,6 +446,7 @@ protected:
 	bool inv;
 	PITimeMeasurer tm_blink;
 };
+#endif // PIP_HAS_THREADS
 
 
 #endif // PISCREENTILES_H
diff --git a/libs/main/console/piterminal.h b/libs/main/console/piterminal.h
index 71aec0ca..6bf7f70b 100644
--- a/libs/main/console/piterminal.h
+++ b/libs/main/console/piterminal.h
@@ -39,6 +39,7 @@
 //! and text formatting.
 //! \~russian Обеспечивает эмуляцию терминала для чтения ввода и вывода консоли. Поддерживает ANSI escape-последовательности для перемещения
 //! курсора, цветов и форматирования текста.
+#if defined(PIP_HAS_THREADS) && (defined(WINDOWS) || defined(PIP_HAS_TTY))
 class PIP_CONSOLE_EXPORT PITerminal: public PIThread {
 	PIOBJECT_SUBCLASS(PITerminal, PIThread);
 
@@ -97,13 +98,13 @@ private:
 	void getCursor(int & x, int & y);
 	uchar invertColor(uchar c);
 	void run() override;
-#ifndef WINDOWS
+#  ifndef WINDOWS
 	void parseInput(const PIString & s);
 	bool isCompleteEscSeq(const PIString & es);
 	void applyEscSeq(PIString es);
 	void moveCursor(int dx, int dy);
 	int termType(const PIString & t);
-#endif
+#  endif
 
 	PRIVATE_DECLARATION(PIP_CONSOLE_EXPORT)
 	int dsize_x, dsize_y;
@@ -112,6 +113,7 @@ private:
 	PITimeMeasurer cursor_tm;
 	PIVector<PIVector<PIScreenTypes::Cell>> cells;
 };
+#endif // PIP_HAS_THREADS
 
 
 #endif // PITERMINAL_H
diff --git a/libs/main/core/piwaitevent_p.cpp b/libs/main/core/piwaitevent_p.cpp
index 36ec80bc..773b28e2 100644
--- a/libs/main/core/piwaitevent_p.cpp
+++ b/libs/main/core/piwaitevent_p.cpp
@@ -27,7 +27,6 @@
 #else
 #  include <errno.h>
 #  include <fcntl.h>
-#  include <sys/ioctl.h>
 #endif
 #include "pistring.h"
 
diff --git a/libs/main/io_devices/pican.cpp b/libs/main/io_devices/pican.cpp
index 92d345f7..15ed3279 100644
--- a/libs/main/io_devices/pican.cpp
+++ b/libs/main/io_devices/pican.cpp
@@ -20,7 +20,7 @@
 
 #include "pipropertystorage.h"
 #include "piwaitevent_p.h"
-#if !defined(WINDOWS) && !defined(MAC_OS) && defined(PIP_HAS_SOCKET)
+#if defined(LINUX) && defined(PIP_HAS_SOCKET)
 #  define PIP_CAN
 #endif
 #ifdef PIP_CAN
diff --git a/libs/main/io_devices/piiodevice.h b/libs/main/io_devices/piiodevice.h
index a339016b..3f5e6a84 100644
--- a/libs/main/io_devices/piiodevice.h
+++ b/libs/main/io_devices/piiodevice.h
@@ -59,20 +59,26 @@ typedef std::function<bool(const uchar *, int, void *)> ReadRetFunc;
 
 #else
 
-#  define REGISTER_DEVICE(name)                                                                                \
-	STATIC_INITIALIZER_BEGIN                                                                                   \
-	  PIIODevice::registerDevice(name::fullPathPrefixS(), #name, []() -> PIIODevice * { return new name(); }); \
-	STATIC_INITIALIZER_END
+#  define REGISTER_DEVICE(name)                                                                                    \
+	  STATIC_INITIALIZER_BEGIN                                                                                     \
+		  PIIODevice::registerDevice(name::fullPathPrefixS(), #name, []() -> PIIODevice * { return new name(); }); \
+	  STATIC_INITIALIZER_END
 
-#  define PIIODEVICE(name, prefix)                                  \
-	PIOBJECT_SUBCLASS(name, PIIODevice)                             \
-	PIIODevice * copy() const override { return new name(); }       \
-                                                                    \
-public:                                                             \
-	PIConstChars fullPathPrefix() const override { return prefix; } \
-	static PIConstChars fullPathPrefixS() { return prefix; }        \
-                                                                    \
-private:
+#  define PIIODEVICE(name, prefix)                   \
+	  PIOBJECT_SUBCLASS(name, PIIODevice)            \
+	  PIIODevice * copy() const override {           \
+		  return new name();                         \
+	  }                                              \
+                                                     \
+  public:                                            \
+	  PIConstChars fullPathPrefix() const override { \
+		  return prefix;                             \
+	  }                                              \
+	  static PIConstChars fullPathPrefixS() {        \
+		  return prefix;                             \
+	  }                                              \
+                                                     \
+  private:
 
 
 #endif
@@ -598,8 +604,10 @@ protected:
 	void * ret_data_ = nullptr;
 
 private:
+#ifdef PIP_HAS_THREADS
 	EVENT_HANDLER(void, read_func);
 	EVENT_HANDLER(void, write_func);
+#endif
 
 	virtual PIIODevice * copy() const { return nullptr; }
 	PIString fullPathOptions() const;
diff --git a/libs/main/piplatform.h b/libs/main/piplatform.h
index f35d43b3..a5e75dcd 100644
--- a/libs/main/piplatform.h
+++ b/libs/main/piplatform.h
@@ -205,4 +205,9 @@
 #  define POSIX_SIGNALS
 #endif
 
+// Platform provides a text terminal (termios TTY) for console keyboard I/O
+#if defined(LINUX) || defined(MAC_OS) || defined(ANDROID) || defined(QNX) || defined(FREE_BSD)
+#  define PIP_HAS_TTY
+#endif
+
 #endif // PIPLATFORM_H