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The following are the specifications for the EasyComm interfaces which
are available with the WiSP programs. The EasyComm
interfaces are for use by those who wish to design their own radio and rotor
controllers.
EASYCOMM I Standard
-------------------
The EasyComm 1 standard is a simple ASCII character based standard for
controlling antennas and rotators.
The host PC issues a single line command as follows -:
AZaaa.a ELeee.e UPuuuuuuuuu UUU DNddddddddd DDD
The Az and El values (aaa.a and eee.e) are not fixed width. They are in
degrees and include 1 decimal place.
The Up and Dn frequencies are in Hz.
UUU and DDD are the uplink and downlink mode.
EASYCOMM II Standard
--------------------
The EasyComm 2 standard is an enhanced protocol to allow full station
control and also feedback from external systems.
The host PC issues commands to the controller by sending a 2 character
command identifier followed by the command value. Commands are
separated by either a space or carriage return or linefeed.
Not all commands need to be implemented, and the most basic system
may only decode the rotator control commands.
The Host PC can issue the following commands -:
Command Meaning Parameters
------- ------- ----------
AZ Azimuth number - 1 decimal place [deg]
EL Elevation number - 1 decimal place [deg]
UP Uplink freq in Hertz
DN Downlink freq in Hertz
DM Downlink Mode ascii, eg SSB, FM
UM Uplink Mode ascii, eg SSB, FM
DR Downlink Radio number
UR Uplink Radio number
ML Move Left
MR Move Right
MU Move Up
MD Move Down
SA Stop azimuth moving
SE Stop elevation moving
AO AOS
LO LOS
OP Set output number
IP Read an input number
AN Read analogue input number
ST Set time YY:MM:DD:HH:MM:SS
VE Request Version
For those commands that require a response, the response is an echo of
the command followed by the response. If the command specifies a field
number (eq. AN or IP), then the two numbers are delimited with a comma.
eg. To read an analogue value, the host sends ANx where x is the
analogue channel number.
In response the controller will reply with ANx,yyy where yyy is the
value read on the analogue port.
eg. To find the controller version number, the host sends VE.
In response the controller sends VExxx where xxx is an ascii string
containing the version number.
All strings sent in either direction are not of fixed length.
The controller can also send unsolicited information back to the
host. This information may be used by the host for alarms or just
control feedback. All of the above commands may be sent by the
controller for information, and in addition the following may also
be sent
ALxxx Alarm, where xxxx is an ascii string with the alarm info.
Chris Jackson, G7UPN
EASYCOMM III Standard
--------------------
The EasyComm 3 standard is an extension of the version 2 with the additional features:
Command Meaning Parameters Hamlib Config Token
------- ------- ---------- -------------------
VL Velocity Left number [mdeg/s]
VR Velocity Right number [mdeg/s]
VU Velocity Up number [mdeg/s]
VD Velocity Down number [mdeg/s]
CR Read config register [0-x] 1
CW Write config register [0-x] 2
GS Get status register 3
GE Get error register 4
VE Request Version 5
IP Read an input number 6
OP Set output number 7
AN Read analogue input number 8
>Several status and error bits can combined. Proposed mapping:
Status Meaning
------- -------
1 Idle
2 Moving
4 Pointing
8 Error
Error Meaning
------- -------
1 Sensor Error
2 Jam
4 Homing Error
>Proposed mapping of configuration registers:
Register Meaning Value
------- ------- ----------
0 MaxSpeed number
a Overshoot 0/1/-
b Jamming 0/1/-
c Endpoints 0/1/-
d Unstick 0/1/-
73, Alexander Schultze
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