Ruby implementation of KORAD KA series power supplies communication protocol. Verified on KA3005P only, but should work also with all supplies of series, including multichannel ones.

Korad_KA_series_driver.rb

require 'rubygems'
require 'serialport'

class Korad
  def initialize(port="/dev/ttyACM0", baud=9600)
    @serial = SerialPort::open(port,baud)
    @serial.read_timeout = 100
  end

  def get_status
    command("STATUS?")
    @serial.read(1).ord.to_s(2)
  end

  def get_idn
    return feedback_command("*IDN?")
  end

  def turn_on
    command("OUT1")
  end

  def turn_off
    command("OUT0")
  end

  def recall_memory(bank)
    command("RCL#{bank}")
  end

  def save_memory(bank)
    command("SAV#{bank}")
  end

  def turn_on_OCP
    command("OCP1")
  end

  def turn_off_OCP
    command("OCP0")
  end

  def turn_on_OVP
    command("OVP1")
  end

  def turn_off_OVP
    command("OVP0")
  end
  
  def set_tracking_mode(value = :independent)
    mode = [:independent, :series, :parallel].index(value)
    mode ? command("TRACK#{mode}") : raise(Exception.new("UnknownModeException"))
  end

  def set_current(channel, value)
    command("ISET#{channel}:#{value}")
  end

  def set_voltage(channel, value)
    command("VSET#{channel}:#{value}")
  end

  def get_stored_current(channel)
    return feedback_command("ISET#{channel}?")
  end

  def get_stored_voltage(channel)
    return feedback_command("VSET#{channel}?")
  end

  def get_output_current(channel)
    return feedback_command("IOUT#{channel}?")
  end

  def get_output_voltage(channel)
    return feedback_command("VOUT#{channel}?")
  end

  private
    def feedback_command(text)
      command(text)
      filtered_output
    end

    def command(text)
      @serial.write(text)
    end

    def filtered_output
      result = @serial.read(200)
      result ? result.each_byte.reject{|i| i== 1}.map{|a| a.chr}.join : result
    end
end

#example:
korad = Korad.new
puts korad.set_voltage(1,7)
sleep(0.1)
puts korad.get_idn

Hi there. I stumbled onto your code snipped while searching for any information about 'programmable power supply' that I recently bought. Within 3 hours of use, I got totally irritated by Chineese malfunctioning software included with it and after some digging I've found that my Axiomet AX-6002P is probably just rebranded KORAD-6002P - and even software from KA6002P worker with my device :) The devices look almost identical, but at the first sight their protocol does not match what you wrote here - my one seems to use simple binary protocol over virtual comport over usb. That's a bit strange, but it is possible that actually these devices support two parallel protocols: ascii and binary. Binary packets seem to always start with 0xAA byte which is outside normal ascii charset. Anyways, as just 2 months passed since you published it, I'm just writing to let you know that I'll be digging in the same subject.

Hey, do you have a link to the programming guide where you got these commands? I can't find it anywhere!

A "python" version also Released under the MIT License.

#!/usr/bin/env python
import serial
from time import sleep

class Korad:
  def __init__(self,port):
     self.ser =serial.Serial(port, 9600, timeout=1)

  def get_status(self):
    self.command("STATUS?")
    return ord(self.ser.read(1))

  def get_idn(self):
    return self.feedback_command("*IDN?")

  def turn_on(self):
    self.command("OUT1")

  def turn_off(self):
    self.command("OUT0")

  def recall_memory(self,bank):
    self.command("RCL%s" % bank)

  def save_memory(self,bank):
    self.command("SAV%s" % bank)

  def turn_on_OCP(self):
    self.command("OCP1")

  def turn_off_OCP(self):
    self.command("OCP0")

  def turn_on_OVP(self):
    self.command("OVP1")

  def turn_off_OVP(self):
    self.command("OVP0")

#  def set_tracking_mode(value = :independent)
#    mode = [:independent, :series, :parallel].index(value)
#    mode ? command("TRACK#{mode}") : raise(Exception.new("UnknownModeException"))
#  end

  def set_current(self,channel,value):
    self.command("ISET%s:%s" % ( channel, value))

  def set_voltage(self,channel, value):
    self.command("VSET%s:%s" % ( channel, value))

  def get_stored_current(self,channel):
    return feedback_command("ISET%s?" % channel)

  def get_stored_voltage(self,channel):
    return feedback_command("VSET%s?" % channel)

  def get_output_current(self,channel):
    return feedback_command("IOUT%s?" % channel)

  def get_output_voltage(self,channel):
    return feedback_command("VOUT%?" % channel)

  def feedback_command(self,text):
      self.command(text)
      return self.filtered_output()

  def command(self,text):
    sleep(0.1)
    self.ser.write(text)

  def filtered_output(self):
    return self.ser.read(200)

# example 
korad =  Korad('/dev/ttyACM0')
korad.set_voltage(1,7)
print korad.get_idn()