psychogenic
diff --git a/‎cores/esp32/HardwareSerial.cpp
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+4Lines changed: 4 additions & 0 deletions b/‎cores/esp32/HardwareSerial.cpp
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+4Lines changed: 4 additions & 0 deletions
diff --git a/‎cores/esp32/HardwareSerial.h
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+1Lines changed: 1 addition & 0 deletions b/‎cores/esp32/HardwareSerial.h
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+1Lines changed: 1 addition & 0 deletions
diff --git a/‎cores/esp32/esp32-hal-uart.c
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+8Lines changed: 8 additions & 0 deletions b/‎cores/esp32/esp32-hal-uart.c
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+8Lines changed: 8 additions & 0 deletions
diff --git a/‎cores/esp32/esp32-hal-uart.h
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+1Lines changed: 1 addition & 0 deletions b/‎cores/esp32/esp32-hal-uart.h
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+1Lines changed: 1 addition & 0 deletions
@@ -62,6 +62,10 @@ int HardwareSerial::available(void)
 {
     return uartAvailable(_uart);
 }
+int HardwareSerial::availableForWrite(void)
+{
+    return uartAvailableForWrite(_uart);
+}
 
 int HardwareSerial::peek(void)
 {
 
@@ -40,6 +40,7 @@ class HardwareSerial: public Stream
     void begin(unsigned long baud, uint32_t config=SERIAL_8N1, int8_t rxPin=-1, int8_t txPin=-1, bool invert=false);
     void end();
     int available(void);
+    int availableForWrite(void);
     int peek(void);
     int read(void);
     void flush(void);
 
@@ -248,6 +248,14 @@ uint32_t uartAvailable(uart_t* uart)
     return uxQueueMessagesWaiting(uart->queue);
 }
 
+uint32_t uartAvailableForWrite(uart_t* uart)
+{
+    if(uart == NULL) {
+        return 0;
+    }
+    return 0x7f - uart->dev->status.txfifo_cnt;
+}
+
 uint8_t uartRead(uart_t* uart)
 {
     if(uart == NULL || uart->queue == NULL) {
 
@@ -55,6 +55,7 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
 void uartEnd(uart_t* uart);
 
 uint32_t uartAvailable(uart_t* uart);
+uint32_t uartAvailableForWrite(uart_t* uart);
 uint8_t uartRead(uart_t* uart);
 uint8_t uartPeek(uart_t* uart);
Original file line number	Diff line number	Diff line change
`@@ -62,6 +62,10 @@ int HardwareSerial::available(void)`
`62`	`62`	`{`
`63`	`63`	`return uartAvailable(_uart);`
`64`	`64`	`}`
	`65`	`+int HardwareSerial::availableForWrite(void)`
	`66`	`+{`
	`67`	`+ return uartAvailableForWrite(_uart);`
	`68`	`+}`
`65`	`69`
`66`	`70`	`int HardwareSerial::peek(void)`
`67`	`71`	`{`