Request to add DFRobot i2c DAC output module (0-10v)

[Nithalik]

Found a awesome DAC from DFrobot, it is the first i2C device that i have found that outputs a 0-10v signal. also has 8 possible i2c addresses. i am a failure at programming so hoping this is universal enough for other people to find useful too.

https://www.dfrobot.com/product-2613.html

tons of lighting systems use 0-10v dimming, and this is the easiest way to add it to mycodo without making your own circuit, which is how i am currently doing it, this is just more user friendly

https://www.prolighting.com/blog/2020/03/25/understanding-0-10v-dimming-with-todays-led-commercial-fixtures/

wiki: https://wiki.dfrobot.com/SKU_DFR0971_2_Channel_I2C_0_10V_DAC_Module

probably somewhat similar to https://kizniche.github.io/Mycodo/Supported-Outputs/#digital-to-analog-converter-mcp4728

i envision the output to just have the option to select i2c address and set output voltage, bit simpler then the mcp4728

they also have 6 version of this board with various different outputs

[kizniche]

Do you own one that you can test with?

[Nithalik]

i am ordering one today to test with, just recently found these.

[Nithalik]

don't think it would matter from your side, but i can always order one of their different versions for testing if you are interested in it.

i just dont really understand the use of the (4-20mA) ones, i think there are really just commercial applications, but there are also the PWM ones

[kizniche]

No need to buy others, unless you have a use for it.

[Nithalik]

ok, ordered, should be here within 2 weeks

[Nithalik]

asking here to see if this is even something feasible if this output module gets added to the system

if this output module is added, would it be hard to also add Trigger Configuration: Trigger: Output based on

if this output gets added, would it be hard to add a similar trigger output based on this output device? does not seem like you can trigger things by i2c devices at this point

[kizniche]

It's feasible and wouldn't be too hard to develop. It would act like any other Value Output that allows you to set a value (between 0 and 10) and would work with the current Output Value Action.

[Nithalik]

the parts have arrived. have 2 of 2-Channel I2C DAC Module (0-10V) and 1 1-Channel 15-bit I2C to 0-5V/10V DAC Module

[silverhawk1983]

that could open some options for both Lights, Fan Control, Valves, VFD and some more hope we can test some soon with those chips

[silverhawk1983]

It's feasible and wouldn't be too hard to develop. It would act like any other Value Output that allows you to set a value (between 0 and 10) and would work with the current Output Value Action.

0-1000 would be more suited for that kind of output in relation to 0.00v to 10.00v so we could send for 6.34v - 634 as value
internally would be higher due to 12/15bit conversion internally

realworld 0.00-10.00v
Mycodo 0-1000(equal to 0 to 1000mV)
module 12bit - 0-4.095 (0x000-0xFFF) / 15bit 0-32767 (0x0000-0x7FFF)

[silverhawk1983]

i got 2 2ch 15bit 0-10v modules today in the mail did we have by any chance some code to test with them

[Nithalik]

no code from me, am in the middle of a move

[kizniche]

Yes, I have a module that you can test. I'll push the code later when I have access to my development system.