bochko
diff --git a/‎cores/esp32/HardwareSerial.cpp
Copy file name to clipboardExpand all lines: cores/esp32/HardwareSerial.cpp
+4Lines changed: 4 additions & 0 deletions b/‎cores/esp32/HardwareSerial.cpp
Copy file name to clipboardExpand all lines: cores/esp32/HardwareSerial.cpp
+4Lines changed: 4 additions & 0 deletions
@@ -11,6 +11,10 @@ HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}
 
 void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin)
 {
+    if(0 > _uart_nr || _uart_nr > 2) {
+        log_e("Serial number is invalid, please use 0, 1 or 2");
+        return;
+    }
     if(_uart) {
         end();
     }
Original file line number	Diff line number	Diff line change
`@@ -11,6 +11,10 @@ HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}`
`11`	`11`
`12`	`12`	`void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin)`
`13`	`13`	`{`
	`14`	`+ if(0 > _uart_nr \|\| _uart_nr > 2) {`
	`15`	`+ log_e("Serial number is invalid, please use 0, 1 or 2");`
	`16`	`+ return;`
	`17`	`+ }`
`14`	`18`	`if(_uart) {`
`15`	`19`	`end();`
`16`	`20`	`}`