OpenDPS is a firmware replacement for the DPS5005 (and friends) that has the roughly same functionality (constant voltage mode with over current protection and constant current mode), has a less cluttered user interface and is remote controllable via wifi (ESP8266) or via a serial port.
There are three accompanying blog posts you might find of interest:
- Part one covers the reverse engineering of the DPS5005.
- Part two describes the design of OpenDPS.
- Part three covers the process of upgrading stock DPS5005:s to OpenDPS.
If you are eager to upgrade your DPS5005, you may skip directly to part three. Oh, and of course you can use OpenDPS for more than a programmable power supply. Why not use it as an interface for your DIY sous vide cooker :D
Check the blog for instructions on how to build, unlock and flash your DPS5005.
Once upgraded and connected to an ESP8266, type the following at the terminal to find its IP address:
% dpsctl.py --scan
172.16.3.203
1 OpenDPS device found
Enable 3.3V limited to 500mA:
% dpsctl -d 172.16.3.203 --voltage 3300
% dpsctl -d 172.16.3.203 --current 500
% dpsctl -d 172.16.3.203 --power on
Query the status of the device:
% dpsctl.py -d 172.16.3.203 --status
V_in : 7.71 V
V_set : 3.30 V
V_out : 3.32 V (on)
I_lim : 0.500 A
I_out : 0.040 A
The project consists of three parts:
opendps/The DPS5005 firmware.esp8266-proxy/The ESP8266 firmware for wifi connected OpenDPS:es.dpsctl/A pyton script for controlling your OpenDPS via wifi or a serial port.
In theory, OpenDPS should work for all the other models in the DPSx0xx series, such as the DPS3005, DPS3012 and DPS5015. For constant current mode in the 12A and 15A versions, you probably need to visit pwrctl_calc_iout_dac in ```pwrcrl.c````. Please share any results. The maxium settable output current can be defined when building opendps, see the makefile.
Licensed under the MIT license. Have fun!