Hi,

I want to implement HART for a project. i am using a raspberry pi pico. HART modules are quite expensive and are not as easily available. From what i understand its simply generating analog signal from 4 to 20ma based on the input from sensor. So is it possible to do it with a digital potentiometer.
I was thinking of connecting sensor to pico and change value of pot accordingly.
Is this possible?
Or are there other ways to do it?
Or are there some Modules or IC available to convert a Voltage reading to current?

Thanks in advance.

 

Hi,

I want to implement HART for a project. i am using a raspberry pi pico. HART modules are quite expensive and are not as easily available. From what i understand its simply generating analog signal from 4 to 20ma based on the input from sensor. So is it possible to do it with a digital potentiometer.
I was thinking of connecting sensor to pico and change value of pot accordingly.
Is this possible?
Or are there other ways to do it?
Or are there some Modules or IC available to convert a Voltage reading to current?

Thanks in advance.

You have been misinformed. HART is actually a hybrid protocol where analog and digital data share the same 4-20ma connection. A potentiometer has no ability to pass digital data. It will do what it does but that may not be of any use to you. It is hard to fathom what you have in mind.