RealtimegaugesT.txt
realtimegaugesT.txt file is not included in the legacy (1.9.4) installation, but is described here
realtimegaugesT.txt file is included in every MX release distribution. Steel Series for MX is a variant on the original SteelSeries_Gauges package. The file contents for MX are as follows:
{"date":"<#date format=HH:mm>",
"temp":"<#temp>",
"tempTL":"<#tempTL>",
"tempTH":"<#tempTH>",
"intemp":"<#intemp>",
"dew":"<#dew>",
"dewpointTL":"<#dewpointTL>",
"dewpointTH":"<#dewpointTH>",
"apptemp":"<#apptemp>",
"apptempTL":"<#apptempTL>",
"apptempTH":"<#apptempTH>",
"feelslike":"<#feelslike>",
"feelslikeTL":"<#feelslikeTL>",
"feelslikeTH":"<#feelslikeTH>",
"wchill":"<#wchill>",
"wchillTL":"<#wchillTL>",
"heatindex":"<#heatindex>",
"heatindexTH":"<#heatindexTH>",
"humidex":"<#humidex>",
"wlatest":"<#wlatest>",
"wspeed":"<#wspeed>",
"wgust":"<#wgust>",
"wgustTM":"<#wgustTM>",
"bearing":"<#bearing>",
"avgbearing":"<#avgbearing>",
"press":"<#press>",
"pressTL":"<#pressTL>",
"pressTH":"<#pressTH>",
"pressL":"<#pressL>",
"pressH":"<#pressH>",
"rfall":"<#rfall>",
"rrate":"<#rrate>",
"rrateTM":"<#rrateTM>",
"hum":"<#hum>",
"humTL":"<#humTL>",
"humTH":"<#humTH>",
"inhum":"<#inhum>",
"SensorContactLost":"<#SensorContactLost>",
"forecast":"<#forecastenc>",
"tempunit":"<#tempunitnodeg>",
"windunit":"<#windunit>",
"pressunit":"<#pressunit>",
"rainunit":"<#rainunit>",
"temptrend":"<#temptrend>",
"TtempTL":"<#TtempTL>",
"TtempTH":"<#TtempTH>",
"TdewpointTL":"<#TdewpointTL>",
"TdewpointTH":"<#TdewpointTH>",
"TapptempTL":"<#TapptempTL>",
"TapptempTH":"<#TapptempTH>",
"TfeelslikeTL":"<#TfeelslikeTL>",
"TfeelslikeTH":"<#TfeelslikeTH>",
"TwchillTL":"<#TwchillTL>",
"TheatindexTH":"<#TheatindexTH>",
"TrrateTM":"<#TrrateTM>",
"ThourlyrainTH":"<#ThourlyrainTH>",
"LastRainTipISO":"<#LastRainTipISO>",
"hourlyrainTH":"<#hourlyrainTH>",
"ThumTL":"<#ThumTL>",
"ThumTH":"<#ThumTH>",
"TpressTL":"<#TpressTL>",
"TpressTH":"<#TpressTH>",
"presstrendval":"<#presstrendval>",
"Tbeaufort":"<#Tbeaufort>",
"TwgustTM":"<#TwgustTM>",
"windTM":"<#windTM>",
"bearingTM":"<#bearingTM>",
"timeUTC":"<#timeUTC format=yyyy,M,d,H,m,s>",
"BearingRangeFrom10":"<#BearingRangeFrom10>",
"BearingRangeTo10":"<#BearingRangeTo10>",
"UV":"<#UV>",
"UVTH":"<#UVTH>",
"SolarRad":"<#SolarRad>",
"SolarTM":"<#solarTH>",
"CurrentSolarMax":"<#CurrentSolarMax>",
"domwinddir":"<#domwinddir>",
"WindRoseData":[<#WindRoseData>],
"windrun":"<#windrun>",
"cloudbasevalue":"<#cloudbasevalue>",
"cloudbaseunit":"<#cloudbaseunit>",
"version":"<#version>",
"build":"<#build>",
"ver":"12"}
MX processes this Cumulus_template_file to create realtimegauges.txt and it is that file (after processing) that is uploaded to your web site to drive the gauges.htm page that you have uploaded to your web server.