Gps Commands - Celestron 21020 Communication Protocol Manual

Get Location
Set Location
Get Time
Set Time

GPS Commands

The following table shows various commands that can be sent to a GPS unit. Note: all units of time are in UT.
Command Function
Is GPS Linked?
X > 0 if linked, 0 if
not linked
Get Latitude
((x*65536)+(y*256)+z)/(2
"w"
"W" &
chr(A) &
chr(B) &
chr(C) &
chr(D) &
chr(E) &
chr(F) &
chr(G) &
chr(H)
"h"
"H" &
chr(Q) &
chr(R) &
chr(S) &
chr(T) &
chr(U) &
chr(V) &
chr(W) &
chr(X)
PC Command
"P" &
chr(1) &
chr(176) &
chr(55) &
chr(0) &
chr(0) &
chr(0) &
chr(1)
"P" &
chr(1) &
chr(176) &
Response
chr(A) & 2.3+
chr(B) &
chr(C) &
chr(D) &
chr(E) &
chr(F) &
chr(G) &
chr(H) &
"#"
"#" 2.3+
chr(Q) & 2.3+
chr(R) &
chr(S) &
chr(T) &
chr(U) &
chr(V) &
chr(W) &
chr(X) &
"#"
"#" 2.3+
Hand Control
Response
chr(x) &
"#"
chr(x) &
chr(y) &
chr(z) &
Applies to
Versions
1.6+
1.6+