conn:connect(13,'utcnist2.colorado.edu')
I use the University of Colorado servers because they are never busy. For other servers, http://tf.nist.gov/tf-cgi/servers.cgi
Output from LuaLoader:
======================
dofile("daytime.lua")
daytime.lua started
>
received
57054 15-02-01 20:40:40 00 0 0 832.3 UTC(NIST) *
extracted Date and Time
2015-02-01 20:40:40
Disconnected
End output
==========
Incidentally, I really like LuaLoader ... thanks for making it available.
-- File name: daytime.lua
-- tested on NodeMCU 0.9.5 build 20150126
-- adapted from httpget.lua (example from LuaLoader Quick Start guide)
-- Queries NIST DayTime server for a date time string
-- Fixed format returned:
-- JJJJJ YR-MO-DA HH:MM:SS TT L H msADV UTC(NIST) OTM.
-- Ex: 57053 15-01-31 20:14:43 00 0 0 703.0 UTC(NIST) *
-- JJJJJ - the modified Julian Date ( MJD is the Julian Date minus 2400000.5)
-- YR-MO-DA - the Date
-- HH:MM:SS - the Time
-- TT - USA is on Standard Time (ST) or (DST) : 00 (ST)
-- L - Leap second at the end of the month (0: no, 1: +1, 2: -1)
-- H - Health of the server (0: healthy, >0: errors)
-- msADV - time code advanced in ms for network delays
-- UTC(NIST) - the originator of this time code
-- OTM - on-time marker : * (time correct on arival)
print('DayTime.lua started')
conn = nil
conn=net.createConnection(net.TCP, 0)
-- show the server returned payload
conn:on("receive", function(conn, payload)
print('\nreceived')
print(payload)
print('extracted Date and Time')
print('20'..string.sub(payload,8,14)..
string.sub(payload,15,24))
end)
-- show disconnection
conn:on("disconnection", function(conn, payload) print('\nDisconnected') end)
--connect
conn:connect(13,'utcnist2.colorado.edu')