* Change STA SSID 
[ESP100]<SSID>
if authentication is on, need admin password
[ESP100]<SSID>pwd=<admin password>

* Change STA Password 
[ESP101]<Password>
if authentication is on, need admin password
[ESP101]<Password>pwd=<admin password>

* Change Hostname 
[ESP102]<hostname>
if authentication is on, need admin password
[ESP102]<hostname>pwd=<admin password>

* Change Wifi mode (STA/AP) 
[ESP103]<mode>
if authentication is on, need admin password
[ESP103]<mode>pwd=<admin password>

* Change STA IP mode (DHCP/STATIC) 
[ESP104]<mode>
if authentication is on, need admin password
[ESP104]<mode>pwd=<admin password>

* Change AP SSID 
[ESP105]<SSID>
if authentication is on, need admin password
[ESP105]<SSID>pwd=<admin password>

* Change AP Password 
[ESP106]<Password>
if authentication is on, need admin password
[ESP106]<Password>pwd=<admin password>

* Change AP IP mode (DHCP/STATIC) 
[ESP107]<mode>
if authentication is on, need admin password
[ESP107]<mode>pwd=<admin password>

* Get current IP
[ESP111]<header answer>

* Get hostname
[ESP112]<header answer>


*Get/Set pin value
[ESP201]P<pin> V<value> [PULLUP=YES RAW=YES]
if no V<value> get P<pin> value
if V<value> 0/1 set INPUT_PULLUP value, but for GPIO16 INPUT_PULLDOWN_16
GPIO1 and GPIO3 cannot be used as they are used for serial
if PULLUP=YES set input pull up, if not set input
if RAW=YES do not set pinmode just read value

* Get/Set ESP mode
cmd can be RESET, SAFEMODE, CONFIG, RESTART
[ESP444]<cmd>
if authentication is on, need admin password for RESET, RESTART and SAFEMODE
[ESP444]<cmd>pwd=<admin password>

* Change / Reset user password
[ESP555]<password>pwd=<admin password>
if no password set it use default one

* Read SPIFFS file and send each line to serial
[ESP700]<filename>

* Get fw version
[ESP800]<header answer>

* Clear status/error/info list
cmd can be ALL, ERROR, INFO, STATUS 
[ESP999]<cmd>