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availableForWrite #4664

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Jan 11, 2021
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5 changes: 5 additions & 0 deletions cores/esp32/Print.h
Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,11 @@ class Print
}

size_t printf(const char * format, ...) __attribute__ ((format (printf, 2, 3)));

// add availableForWrite to make compatible with Arduino Print.h
// default to zero, meaning "a single write may block"
// should be overriden by subclasses with buffering
virtual int availableForWrite() { return 0; }
size_t print(const __FlashStringHelper *);
size_t print(const String &);
size_t print(const char[]);
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