I own an ADS1115 and SCT-013-030 (30A/1V). I have been trying to achieve rms current reading using this current sensor through 16-bit ADC. However, could not success at getting the right values. Unfortunately, there aren’t many examples that is done via an ADC. From my readings, I have concluded that my GAIN value needs to be set to 2 and since this version of current sensor has a burden sensor, I connect the positive cable to A0 pin of the ADC and the negative cable to the GND. I also tried the version of reading the differential from A0 to A1 but interestingly, I calculate 0mV from both the ADC voltage and amper meter. Could not find a reasonable explanation though.
@KyleGabriel I also noticed the Energy Usage section in Mycodo but I could not find the source class that you make the calculation using ADC. Could you share the right python file that you achieve it? I also want to verify it by myself to see whether everything works properly.
@KyleGabriel As far as backtracking Mycodo, I notice that calc_energy_usage and return_output_usage functions (in mycodo/utils/tools.py) handle the most part of the calculation. But one thing I still could not figure out is whether the RMS current is calculated manually in one of the Mycodo built-in scripts or within the InfluxDB query which happens in the average_start_end_seconds function (mycodo/utils/influx.py).
I’ll need to take a look at the code before I can give you any real response. I just wanted to let you know this thread is on my radar and I’ll check it out soon. It looks like you’re on the right track, though.
return_energy_usage() in mycodo/utils/tools.py is what aggregates the Amp measurements for the Current Input energy usage stats. The return values of the function (energy_usage_stats and graph_info) are used in mycodo/mycodo_flask/templates/pages/usage.html.
I’d like to measure the monetary current calculation in Mycodo by plugging the current sensor’s positive and negative sides both in Analog pins in ADS1115 and reading the A0-A1 difference. How can I adapt it in that way? Because there are only options for single Analog pins in the dropdown menu.
I will also let you know if I could get accurate results.