Celestron NexStar 4SE Computerized Telescope NexStar Communication Protocol v - Page 6

RTC Commands, Get Longitude

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^24) is a fraction of a rotation. To convert to degrees, multiply by 360. chr(1) & chr(0) & chr(0) & chr(0) & chr(3) Get Longitude ((x*65536)+(y*256)+z)/(2 ^24) is a fraction of a rotation. To convert to degrees, multiply by 360. "P" & chr(1) & chr(176) & chr(2) & chr(0) & chr(0) & chr(0) & chr(3) Get Date x is month (1-12) y is day (1-31) "P" & chr(1) & chr(176) & chr(3) & chr(0) & chr(0) & chr(0) & chr(2) Get Year (x * 256) + y = year "P" & chr(1) & chr(176) & chr(4) & chr(0) & chr(0) & chr(0) & chr(2) Get Time x is the hours y is the minutes z is the seconds "P" & chr(1) & chr(176) & chr(51) & chr(0) & chr(0) & chr(0) & chr(3) "#" chr(x) & chr(y) & chr(z) & "#" 1.6+ chr(x) & chr(y) & "#" 1.6+ chr(x) & chr(y) & "#" 1.6+ chr(x) & chr(y) & chr(z) & "#" 1.6+ RTC Commands The following table shows various RTC commands on the CGE mount. Command Function Get Date x is month (1-12) y is day (1-31) PC Command "P" & chr(1) & chr(178) & chr(3) & chr(0) & chr(0) & chr(0) & Hand Control Response chr(x) & chr(y) & "#" Applies to Versions 1.6+

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^24) is a fraction of a
rotation.
To convert to
degrees, multiply by
360.
chr(1) &
chr(0) &
chr(0) &
chr(0) &
chr(3)
“#”
Get Longitude
((x*65536)+(y*256)+z)/(2
^24) is a fraction of a
rotation.
To convert to
degrees, multiply by
360.
“P” &
chr(1) &
chr(176) &
chr(2) &
chr(0) &
chr(0) &
chr(0) &
chr(3)
chr(x) &
chr(y) &
chr(z) &
“#”
1.6+
Get Date
x is month (1-12)
y is day (1-31)
“P” &
chr(1) &
chr(176) &
chr(3) &
chr(0) &
chr(0) &
chr(0) &
chr(2)
chr(x) &
chr(y) &
“#”
1.6+
Get Year
(x * 256) + y = year
“P” &
chr(1) &
chr(176) &
chr(4) &
chr(0) &
chr(0) &
chr(0) &
chr(2)
chr(x) &
chr(y) &
“#”
1.6+
Get Time
x is the hours
y is the minutes
z is the seconds
“P” &
chr(1) &
chr(176) &
chr(51) &
chr(0) &
chr(0) &
chr(0) &
chr(3)
chr(x) &
chr(y) &
chr(z) &
“#”
1.6+
RTC Commands
The following table shows various RTC commands on the CGE mount.
Command Function
PC Command
Hand Control
Response
Applies to
Versions
Get Date
x is month (1-12)
y is day (1-31)
“P” &
chr(1) &
chr(178) &
chr(3) &
chr(0) &
chr(0) &
chr(0) &
chr(x) &
chr(y) &
“#”
1.6+