Common online experiments commands
==================================
Command		#Meaning and parameters x,y and z
============	=================================
NEW		New starting of expt
LOW		Make all relays in LOW status
HIGH		Make all relays in HIGH status
SHOWS=x		Show all output (x=1) or not (x=0, default)
PRINT=x		Print extra output (x=1) or not (x=0, default)
SET		Display current settings via USB or BT
SAVESD=x		Save data to SD card (x=1) or not (x=0, default)
M=xy		Move step motor forward (x=F) or reverse (x=R) by 100*y steps
N=x		Rotate servo motor to the angle x in degree
DSTN=x		Set number of DST thermometers to x.
TEMPC=X		Set temperature (>X) to power off oven
NET=x		Set module x=0 for BT, x=1 for BLE and x=2 for WiFi
BT=xxx		Set BT name to xxx (up to 10 characters)
PIN=xxxx		Set BT pin (4 digits)
SIP=xxx.xxx.xxx.xxx	Set server ip
TSIP=xxx.xxx.xxx.xxx	Set time server ip
SN=server_host_name     Set server host name
TIME=x		Set time interval for auto measurement to x in seconds
AUTOSTART=x		Enable auto measurement (x=1) or not (x=0, default)
SHOWIP		Show Arduino's IP address
PATH=xxx		Set server path for upload of data, e.g. /oe/abc/s1/
USER=XXX		Set user name for ftp upload, e.g. sesuser
RNAME=x yyy		Set relay x with a name yyy
NUNCHUK=x		Enable the nunchuk (x=1) or not (x=0, default)
RELAY Rx=y&Tx=z&..	Set relay x to on (x=1) or off (x=0) for a duration of z seconds
RELAY Rx=y&Dx=z&..	Set relay x to on (x=1) or off (x=0) after a time delay of z seconds
REBOOT		REBOOT the Arduino now
VERSION		Show program version
LOGGER		Show BT or logger name
SETCLOCK		Calibrate clock time to Internet time
LCD=x		LCD on (x=1) or off (x=0)
CRELAYx=y	Change relay x to pin=Ayy or Dyy or relay#y
EXPT=x		Set up the hardware for expt number x
ESET=x          Set to electrical sensor Esetc=x (0 for all and x>0 for lamp x)
CZERO		Set zero for current sensor Esetc
MEASURE		Make a single measurement
TIMESTAMP=x	Set clock time to x (seconds elapsed since 1970-1-1)
TESTREALY	Switch on all relay one-by-one
VTYPE=x		Set voltage sensor type=x
CTYPE=x		Set current sensor type=x
PHENABLE=x      Enable or disable pH sensors (x=1 or 0) for Landfill gas expt
N=x (or M2=x)	Rotate the servo motory with an angle=x
----- When the following commands are applied to polarization expt, add prefix "T" or "P" for the stage table or polarizer ----
ANGS=x		Rotate the step motor of the table or polarizer to a given angle x
ANGM=x		Mark current position of the table or polarizer as a given angle x (for step motor)
ANGLE=x 	Rotate the step motor of the table with a given angle x (or A=x)
PA=x		Rotate the step motor of the polarizer with a given angle x
TA=x		Rotate the step motor of the table with a given angle x
ANGM=x		Mark current position of the step motor as a given angle x (for step motor)
ANGC=x		Calibrate the step motor with steps per angle = x
SPA=x		Set the step motor with steps per angle = x
SPEED=x		Set the step motor with speed = x