diff --git a/arduino/beken-72xx/cores/arduino/wiring.c b/arduino/beken-72xx/cores/arduino/wiring.c
index 4ac8103..c40aa35 100644
--- a/arduino/beken-72xx/cores/arduino/wiring.c
+++ b/arduino/beken-72xx/cores/arduino/wiring.c
@@ -17,11 +17,11 @@ void delayMicroseconds(unsigned int us) {
 	}
 }
 
-uint32_t millis() {
+unsigned long millis() {
 	return xTaskGetTickCount() * portTICK_PERIOD_MS;
 }
 
-uint32_t micros() {
+unsigned long micros() {
 	// TODO implement this properly
 	return millis() * 1000;
 }
diff --git a/arduino/libretuya/api/WiFi/WiFiScan.cpp b/arduino/libretuya/api/WiFi/WiFiScan.cpp
index 7859904..c0a11fa 100644
--- a/arduino/libretuya/api/WiFi/WiFiScan.cpp
+++ b/arduino/libretuya/api/WiFi/WiFiScan.cpp
@@ -10,6 +10,7 @@ bool WiFiClass::getNetworkInfo(
 	rssi	= RSSI(networkItem);
 	bssid	= BSSID(networkItem);
 	channel = this->channel(networkItem);
+	return true;
 }
 
 int16_t WiFiClass::scanComplete() {
diff --git a/arduino/libretuya/core/LibreTuyaCustom.c b/arduino/libretuya/core/LibreTuyaCustom.c
index c004516..0fe5738 100644
--- a/arduino/libretuya/core/LibreTuyaCustom.c
+++ b/arduino/libretuya/core/LibreTuyaCustom.c
@@ -10,7 +10,11 @@ int _analogWritePeriod	   = 20000; // 50 Hz
  * @brief Check if pin is invalid (too low or too high).
  */
 bool pinInvalid(pin_size_t pinNumber) {
+#ifdef PINS_COUNT
 	return pinNumber < 0 || pinNumber >= PINS_COUNT;
+#else
+	return false;
+#endif
 }
 
 /**
diff --git a/arduino/libretuya/core/lt_logger.c b/arduino/libretuya/core/lt_logger.c
index 1afb596..648ddfe 100644
--- a/arduino/libretuya/core/lt_logger.c
+++ b/arduino/libretuya/core/lt_logger.c
@@ -4,7 +4,7 @@
 
 #include <Arduino.h>
 
-#if LT_LOGGER_TASK
+#if LT_LOGGER_TASK && LT_HAS_FREERTOS
 #include <FreeRTOS.h>
 #include <task.h>
 #endif
@@ -57,7 +57,7 @@ void lt_log(const uint8_t level, const char *format, ...) {
 #endif
 #endif
 
-#if LT_LOGGER_TASK
+#if LT_LOGGER_TASK && LT_HAS_FREERTOS
 	char task_colon	  = ':';
 	TaskHandle_t task = xTaskGetCurrentTaskHandle();
 	char *task_name	  = pcTaskGetTaskName(task);
@@ -90,7 +90,7 @@ void lt_log(const uint8_t level, const char *format, ...) {
 #if LT_LOGGER_CALLER
 		"%s():%hu: "
 #endif
-#if LT_LOGGER_TASK
+#if LT_LOGGER_TASK && LT_HAS_FREERTOS
 		"%s%c "
 #endif
 		,
@@ -112,7 +112,7 @@ void lt_log(const uint8_t level, const char *format, ...) {
 		caller,
 		line
 #endif
-#if LT_LOGGER_TASK
+#if LT_LOGGER_TASK && LT_HAS_FREERTOS
 		,
 		task_name,
 		task_colon // printing outside of tasks
diff --git a/arduino/libretuya/libraries/Update/Update.cpp b/arduino/libretuya/libraries/Update/Update.cpp
index 23a45ad..983f469 100644
--- a/arduino/libretuya/libraries/Update/Update.cpp
+++ b/arduino/libretuya/libraries/Update/Update.cpp
@@ -127,6 +127,7 @@ size_t UpdateClass::writeStream(Stream &data) {
 			// return on errors
 			return written;
 	}
+	return written;
 }
 
 /**
diff --git a/arduino/realtek-ambz/cores/arduino/wiring.c b/arduino/realtek-ambz/cores/arduino/wiring.c
index f8ae1fd..72957c3 100644
--- a/arduino/realtek-ambz/cores/arduino/wiring.c
+++ b/arduino/realtek-ambz/cores/arduino/wiring.c
@@ -59,11 +59,11 @@ void delayMicroseconds(unsigned int us) {
 	}
 }
 
-uint32_t millis(void) {
+unsigned long millis(void) {
 	return (__get_ipsr__() == 0) ? xTaskGetTickCount() : xTaskGetTickCountFromISR();
 }
 
-uint32_t micros(void) {
+unsigned long micros(void) {
 	uint32_t tick1, tick2;
 	uint32_t us;
 	uint32_t tick_per_us = F_CPU / 1000;