ESP8266 Community Forum

Anyone know who makes the function os_install_putc2() ?

Thanks,

As far as I can tell it's not used anywhere. None of the libraries reference it (or ets_install_putc2 which is what it's actually defined as). I've dumped the library symbols here, and ets_install_putc1 is referenced but not 2:

http://41j.com/blog/2015/01/esp8266-sdk ... y-symbols/

It sits at memory address 0x4000248c, which I believe is in the internal ROM. But to me it looks like none of the (non-ROM) code is actually using it. Could be used in the internal ROM itself though.