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Add reference on how to enable printf function #492

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2 changes: 2 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,8 @@ more than 20 milliseconds is not recommended.

By default the diagnostic output from WiFi libraries is disabled when you call ```Serial.begin```. To enable debug output again, call ```Serial.setDebugOutput(true);```. To redirect debug output to ```Serial1``` instead, call ```Serial1.setDebugOutput(true);```.

You also need to use ```Serial.setDebugOutput(true)``` to enable output from the Arduino ```printf()``` function.

Both ```Serial``` and ```Serial1``` objects support 5, 6, 7, 8 data bits, odd (O), even (E), and no (N) parity, and 1 or 2 stop bits. To set the desired mode, call ```Serial.begin(baudrate, SERIAL_8N1);```, ```Serial.begin(baudrate, SERIAL_6E2);```, etc.

#### Progmem ####
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