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47 lines
1.5 KiB
47 lines
1.5 KiB
4 years ago
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#!/usr/bin/env python3
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import os
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import sys
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import time
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def average(avg, sample):
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# Weighted avg between existing value and new sample
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return ((avg[0] * avg[1] + sample) / (avg[1] + 1), avg[1] + 1)
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if __name__ == '__main__':
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sample_time = None
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if len(sys.argv) > 1:
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sample_time = int(sys.argv[1])
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start_time = time.monotonic()
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try:
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voltage_average = (0., 0) # average, count
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current_average = (0., 0)
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power_average = (0., 0)
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while sample_time is None or time.monotonic() - start_time < sample_time:
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with open("/sys/bus/i2c/devices/0-0040/hwmon/hwmon1/in1_input") as f:
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voltage = int(f.read()) / 1000.
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with open("/sys/bus/i2c/devices/0-0040/hwmon/hwmon1/curr1_input") as f:
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current = int(f.read())
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power = voltage*current
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# compute averages
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voltage_average = average(voltage_average, voltage)
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current_average = average(current_average, current)
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power_average = average(power_average, power)
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print("%.2f volts %12.2f ma %12.2f mW" % (voltage, current, power))
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time.sleep(0.25)
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finally:
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stop_time = time.monotonic()
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print("\n----------------------Average-----------------------------------")
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voltage = voltage_average[0]
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current = current_average[0]
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power = power_average[0]
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print("%.2f volts %12.2f ma %12.2f mW" % (voltage, current, power))
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print(" {:.2f} Seconds {} samples".format(stop_time - start_time, voltage_average[1]))
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print("----------------------------------------------------------------")
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