dc6006l - CLI/library to control FNIRSI DC Power Supply (DC-6006L, etc)

What is this?

FNIRSI DC6006L is a programmable DC power supply that is quite compact and inexpensive. This CLI tool/library allows you to control an unit over a built-in USB-serial port.

This work is based on the work by jcheger for a similar model, DC-580. They seem to support same set of commands, but are not compatible in message format.

How to install

pip install dc6006l

How to use

dc6006l - Controls FNIRSI DC Power Supply (DC-6006L, etc)
Usage: dc6006l [-p devport] [-m model] cmd [cmd...]
Commands:
  on: Turn power on
  off: Turn power off
  v=
   
    : Set target voltage
  c=
    : Set target current
  ovp=
     
      : Set over-voltage limit
  ocp=
     
    : Set over-current limit
  opp=
     
      : Set over-power limit
  ohp=
      
       : Set over-hour limit (0 to disable)
  noprotect: Disable protection
  stat: Show status (packed trace)
  trace=
       
        : Show trace capture (infinite if n=-1) flush: Flush/clear log buffer echo=
        
         : Print given input sep: Print separator string sleep=
         
          : Sleep for given seconds check: Enable double-check mode Example: # Output 1V1A for ~3s $ dc6006l v=1 c=1 on sleep=3 off # More complex operation $ dc6006l check v=1.5 c=1.0 on flush sep trace=15 c=0.5 flush sep trace=15 off NOTE: - Set envvar FNIRSI_PS=/some/devport to specify default port to use. 
         
        
       
      
     
   

NOTE

While this code works for me, your milage may vary.

Just as a head-up, in one case, target voltage was unexpectedly set to 15V when I sent a command to set to 1.5V (V0150). Because there is no checksum in frame, I suppose the unit dropped a byte and somehow interpreted as "V1500". While the hardware is nice, it seems there is a serious issue with firmware of the product that it easily drops data sent over a serial port.

I added double-check mode (cmd: check) to cope with this, but this mode is ineffective if you need to change the setting while the unit is already on.