My goal is to measure the deep sleep power consumption of an ESP32-H2 using the Digilent Analog Discovery 3. In my previous question on the Digilent forums, Digilent engineer @attila recommended me to use the AD3 Current & Power Adapter to measure the deep sleep current of my ESP32-H2.
In addition, pictures of the actual circuit that I created are shown below.
On the software side, I am using the Current and Power Adapter Reference WaveForms Workspace given in the Getting Started guide. I powered on my PPK2 to supply 3.3 volts, and I did not turn on the WaveForms supply, as the power supply was coming from the PPK2. When doing so, all I see in the "Scopes" mode of the WaveForms application is that C1, C2, and the current are flat lines, even though the device is on:
However, this is not the expected energy consumption of my ESP32-H2. In order to double check that my ESP32-H2 was on, I measured the energy consumption of the device. The measurements that I got from the PPK2 (shown below), is what I expect to see from the AD3 and WaveForms application.
However, I want to obtain these measurements from the AD3 with the Current and Power Adapter, and not on the PPK2. I described my reasons for doing so in the final three paragraphs of my previous question in the Digilent forums.
When investigating why I was not able to measure the current correctly using the AD3 and the Current & Power Adapter, I found this part helpful from the Getting Started guide:
Quote
My current and power in the plot seem to be flat instead of fluctuating like I would expect with my variable power input.
Make sure the positive 5 V supply is enabled.
This gave me the idea to set up the power supply of the AD3 to 3.3 volts in the WaveForms application:
When doing so, I noticed that I am able to capture a very small waveform that looks similar to the waveforms I found when measuring my ESP32-H2 current using the AD3 BNC Adapter.
However, when I try to zoom in on it, I get a very grainy and low quality resolution of the waveform.
These observations allow me to conclude that I am not using the AD3 Current and Power adapter properly. As a result, I would like to ask the following questions:
What am I doing wrong in the setup of the circuit and how I am using the WaveForms Reference workspace given in the Getting Started guide?
In the Getting Started guide, I noticed that their setup used green, yellow, blue, and black connectors with "mini-grabber hooks", as can be seen in their final setup image. I tried searching for them in the Digilent store, but I was not able to find these cables. The guide calls them "banana connectors", but even with this information, I'm not sure where I can find these in the Digilent store. Where and how I can purchase these connectors? Given my current setup, will these cables be of any help?
To the best of my knowledge, the only resource I could find on how to use the Current & Power Adapter is the Getting Started guide, so I do not know where else to look.
Any guidance, feedback, and advice on how I can properly use the AD3 Current & Power Adapter to measure the current of an ESP32-H2 under deep sleep (at the granularity of very small currents in uA), using the PPK2 for power supply, would be greatly appreciated.
Edited by siatran Stated that I could not find much resources that could help me.
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siatran
Hello everyone,
My goal is to measure the deep sleep power consumption of an ESP32-H2 using the Digilent Analog Discovery 3. In my previous question on the Digilent forums, Digilent engineer @attila recommended me to use the AD3 Current & Power Adapter to measure the deep sleep current of my ESP32-H2.
Following the instructions from the Getting Started guide (and improvising where need be), I had set up a circuit that uses the Nordic Semiconductors Power Profiler Kit II (PPK2) to provide 3.3 volts. A diagram of the circuit I created can be seen below.
In addition, pictures of the actual circuit that I created are shown below.
On the software side, I am using the Current and Power Adapter Reference WaveForms Workspace given in the Getting Started guide. I powered on my PPK2 to supply 3.3 volts, and I did not turn on the WaveForms supply, as the power supply was coming from the PPK2. When doing so, all I see in the "Scopes" mode of the WaveForms application is that C1, C2, and the current are flat lines, even though the device is on:
However, this is not the expected energy consumption of my ESP32-H2. In order to double check that my ESP32-H2 was on, I measured the energy consumption of the device. The measurements that I got from the PPK2 (shown below), is what I expect to see from the AD3 and WaveForms application.
However, I want to obtain these measurements from the AD3 with the Current and Power Adapter, and not on the PPK2. I described my reasons for doing so in the final three paragraphs of my previous question in the Digilent forums.
When investigating why I was not able to measure the current correctly using the AD3 and the Current & Power Adapter, I found this part helpful from the Getting Started guide:
This gave me the idea to set up the power supply of the AD3 to 3.3 volts in the WaveForms application:
I want to note that I did not set the supply to 5 volts, as given in the instructions, as (given my current configuration of the device) using 5 volts will risk frying my ESP32-H2.
When doing so, I noticed that I am able to capture a very small waveform that looks similar to the waveforms I found when measuring my ESP32-H2 current using the AD3 BNC Adapter.
However, when I try to zoom in on it, I get a very grainy and low quality resolution of the waveform.
These observations allow me to conclude that I am not using the AD3 Current and Power adapter properly. As a result, I would like to ask the following questions:
To the best of my knowledge, the only resource I could find on how to use the Current & Power Adapter is the Getting Started guide, so I do not know where else to look.
Any guidance, feedback, and advice on how I can properly use the AD3 Current & Power Adapter to measure the current of an ESP32-H2 under deep sleep (at the granularity of very small currents in uA), using the PPK2 for power supply, would be greatly appreciated.
Edited by siatranStated that I could not find much resources that could help me.
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