golang API for Skywatcher(c) wifi modules or AZGTi mounts

This GO module is usefull to control a wifi-aware Skywatcher(c) mount over wifi.

The module implements a couple of SW methods to control the motors (SW functions) and a couple of combo methods to control the mount in a more complex manner.

As of now, the API is not aware of the terrestrial or sky coordinates; therefore, tracking is only possible in EQ mode and the slew rate does not take into consideration the atmospheric diffraction

Note: I'm in no way related to Skywatcher(c) and this API is based only on my very limited experimentation with the protocols involved. Please be aware that using this API for any reason may have unexpected consequences

usage

To find all available mounts available on you network, use the FindMounts() function:

package main

import (
        "fmt"
        "github.com/kairos10/swapi/motor/wifi"
)

func main() {
        mounts := wifi.FindMounts()
        if len(mounts) > 0 {
                for i := 0; i < len(mounts); i++ {
                        m := mounts[i]
                        fmt.Printf("found: %s:%d, time[%s]\n", m.UDPAddr.IP, m.UDPAddr.Port, m.DiscoveryTime)
                }
        } else {
                fmt.Println("nothing found")
        }
}

The RetrieveMountParameters() method could be used to retrieve the mount's parameters:

...
                        err := m.RetrieveMountParameters()
                        if err != nil {
                                fmt.Println("RetrieveMountParameters error: ", err)
                        }
                        fmt.Printf("Mount parameters: counts/revolution=%v timerFrequency=%d\n", m.MCParamCPR, m.MCParamFrequency)
...

To slew the RA axis CCW, at a medium speed, for one second:

...
                        err = m.SetSlewRate(wifi.AXIS_RA_AZ, -wifi.SLEW_SPEED_5, 1000 * time.Millisecond)
                        if err != nil {
                                fmt.Println("SetSlewRate error: ", err)
                        } else {
                                fmt.Println("SetSlewRate: done")
                        }
...

GOTO to a specific tick position

			err = m.GoToPosition(wifi.AXIS_RA_AZ, 0)

Move an axis for a specified number of ticks

			err = m.GoToRelativeIncrement(wifi.AXIS_RA_AZ, m.MCParamCPR/360) // 1 angular degree gets transformed to [MCParamCPR/360] ticks

Samples

app/sw_joy.go

controls a SW mount over wifi, from a gamepad connected to your computer

go run app/sw_joy.go

app/equtil.go

issues simple commands to a wifi connected motor controller (meridian flip, reset home position, etc)

go run app/equtil.go [command]