PICのコードの動作確認のためにコード中にprintfを書いてパソコンの通信ソフトウェアでその内容を受信する方法です。ArduinoではSerialPortの設定をしてArduino IDEのターミナルで簡単にできます。とても便利なのでPICでも同じことがやりたかっただけです。

I will need to purchase an ESP8266 and explore this further. I've had a lot of problems with this library and ESP in general. Also - doesn't the ESP core already provide a printf? I think that was a ...

I suspect the mpaland approach to the definitions resulted in printf_ being used as the actual name instead of printf w/ the Aliasing option, which avoided the optimization in the past. One workaround ...

First off, if you’re looking at that title and thinking it’s flame-bait, please hold off. What [Ihsan Kehribar] is working with is another way to get some feedback for what’s going on with your ...