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sem6000.py
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sem6000.py
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#! /usr/bin/env python3
import subprocess as _subprocess
import json as _json
def query_sem6000_status() -> dict:
""" Query Voltcraft SEM6000 status
Example response:
{
"device" : null,
"status" : {
"power" : 1,
"voltage" : 227,
"ampere" : 0.021,
"watts" : 0.919,
"frequency" : 50,
"power_factor" : 0.19,
"total" : 0.0
},
"settings" : null,
"schedulers" : null,
"countdown" : null,
"randommode" : null,
"data_per_hour" : [
],
"data_per_day" : [
],
"data_per_month" : [
]
}
"""
process = _subprocess.Popen(
[
"/home/pi/voltcraft-sem-6000/sem-6000.exp",
"coffee_grinder",
"--status",
"--json",
],
stdout=_subprocess.PIPE,
stderr=_subprocess.PIPE,
)
stdout, stderr = process.communicate()
# if "Connection failed" in str(stderr):
# _subprocess.Popen(["sudo", "reboot"])
try:
return _json.loads(stdout)
except _json.decoder.JSONDecodeError:
return {}
def get_current_power_consumption() -> float:
""" return current power consumption in watts """
status_response = query_sem6000_status()
return float(status_response["status"]["watts"])