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dpm86

Tool for controlling DPM86xx Series power supply via its RS485 interface.

Usage

       ./dpm86 action parameter

Command line arguments

       output/o                                -- read the actual output state (on/off)
       output/o 1/on                           -- turn the output on
       output/o 0/off                          -- turn the output off

       voltage/volt/v                          -- read the actual delivered voltage
       voltage/volt/v <0.0 .. max>             -- set the voltage target
       voltage/volt/v target/setting           -- read the voltage target
       voltage/volt/v max                      -- read the maximum output voltage

       current/c/ampere/amp/a                  -- read the actual deliviered current
       current/c/ampere/amp/a <0.0 .. max>     -- set the current target
       current/c/ampere/amp/a target/setting   -- read the current target
       current/c/ampere/amp/a max              -- read the maximum output current

       power/p/watt/w                          -- read the actual delivered power
       power/p/watt/w target/setting           -- read the power target

       const/C                                 -- read the actual const setting (voltage/const)
       const/C voltage/v                       -- set constant voltage delivery
       const/C current/c/ampere/amp/a          -- set constant current delivery

       temp/t                                  -- read the temperature

       READ/R <function>                       -- read value from function (DANGEROUS!)
       WRITE/W <function> <value>              -- write <value> to <function> (DANGEROUS!)

Examples

  • Turn output off, read output state, turn output on, read output state again:

         user@mybox:~$ ./dpm86 output off
     ok
     user@mybox:~$ ./dpm86 output
     0
     user@mybox:~$ ./dpm86 output on
     ok
     user@mybox:~$ ./dpm86 output
     1
     user@mybox:~$

  • Read actual delivered current

         user@mybox:~$ ./dpm86 current
     12.55
     user@mybox:~$

  • Set the current target to 1.301 A

         user@mybox:~$ ./dpm86 ampere 1.301
     ok
     user@mybox:~$ ./dpm86 amp target
     1.301
     user@mybox:~$

  • Read actual delivered voltage

         user@mybox:~$ ./dpm86 v
     21.20
     user@mybox:~$

  • Set the voltage target to 25.3 V

         user@mybox:~$ ./dpm86 voltage 25.3
     ok
     user@mybox:~$ ./dpm86 v target
     25.30
     user@mybox:~$

  • Read the temperature

         user@mybox:~$ ./dpm86 t
     39
     user@mybox:~$

Should work with

Be aware!

  1. The power supply has to be set to "simple protocol". Please check the manual.
  2. Check the variable 'tty' and choose the right ttyUSB-device.
  3. Check the variable 'CURRENT_MAX' and set it to the maxium current delivered by your power supply.
  4. DO NOT USE Raspberry 4! After a while a error message shows up ("serial.serialutil.SerialException: [Errno 12] could not open port /dev/ttyUSB0: [Errno 12] Cannot allocate memory: '/dev/ttyUSB0'") and the serial port isn't reachable anymore. Use RPi 3 or RPi Zero (W) instead.
  5. This script comes along with no warranty at all. You have been warned.
  6. Have fun.