Abserver_arduino

Arduino code made to work with abserver_rpi project

Hardware

Original project board - Arduino nano (Atmega328P)

Drivers - DRV8825/A4988

Soldered on breadboard, but PCB Coming Soon!

API

Commands are sent over serial port at 115200 baud rate. You can change baud rate by your preference, but 115200 is the fastest baud rate with 30cm cable that is stable, and is not slow enough to be noticeable.

API is made using ArduinoJson library.

Sample message:

{"n" : *action_name*, "p": *action_params*}

• action_name - name from list of possible actions
• action_params - params for a certain action also from list of possible actions

Actions list

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Developement stages:

• 🌑 - not implemented, but planned
• 🌗 - implemented, but not finalized and tested
• 🌕 - implemented and tested

Command	Description	Impl. status	Params
ping	Returns pong and firmware version	🌕	None
moveto	Aims telescope at given cordinates	🌗	->🌌<-
move	Aims telescope at relative cordinates	🌕	->🌌<-
track	Starts compensating for earth rotation at set position	🌗	->🌌<-
config	Used for parameters configuration	🌗	->🌌<-
stop	Stops all steppers	🌕	None

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Ping

• Returns arduino firmware version to check the compitability of APIs

Response:

{"type": "pong", "vesrion": *firmware version*}

MoveTo

Params:

• "ha" - Hour Angle of an object
• "dec" - Declination of an nedeed object

Example:

{"n": "moveTo", "p": {"dec": 35.5}}

Move

Params:

• "decDiff" - the declination angle you you want to move your telescope on
• "haDiff" - the hour angle you want to move your telescope on

Example:

{"n": "move", "p": {"decDiff": 10}}

Track

Params:

• "t" - Time to automatically stop tracking

Example:

{"n": "track", "p": {"t": 500}}

Config

Params:

• "reportFrequency": float - Report frequency for the status message. High frequencies can interrupt tracking. Will be fixed in future updates.

Example:

{"n": "config", "p": {"reportFrequency": 0.25}} //Every 4 seconds

Other features coming soon...