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998951d9fa
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.env
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.env
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MQBROKER=<IP OF THE BROKER> # ip address of the MQTT broker
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MQPORT=<PORT OF THE BROKER> # port of the MQTT broker
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MQUSER=<MQTT USERNAME> # username for MQTT broker
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MQPWD=<MQTT PASSWORD> # password for MQTT broker
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MQTOPIC_P_HOUSE=<HOUSE P TOPIC> # the MQTT topic for current house power
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MQTOPIC_P_SOLAR=<SOLAR P TOPIC> # the MQTT topic for current solar power
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MAXIMUM_DATA_TS_DEVIATION=1 # maximum time difference which is accepted for the arrival of house power and solar power MQTT messages, default: 5 [sec]
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OPENDTU_ADDR=<ADDRESS OF OPENDTU> # address of opendtu (format: http(s)://<IP-HOSTNAME>:<PORT>/)
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OPENDTU_USER=<OPENDTU USER> # username for opendtu auth
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OPENDTU_PWD=<OPENDTU PWD> # password for opendtu auth
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OPENDTU_INVERTER_SN=<SERIAL NR> # serial number of the inverter to control
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LIMIT_CORRECTION_FACTOR=2 # correction factor for limit setting (e.g.: when only 2 strings of 4 are connected, you always need to set 2x the power), default: 2
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LIMIT_UPDATE_INTERVAL=5 # interval in which the limit shall be updated, default: 5 [sec]
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DRY_RUN=0 # if the limit shall be set or not; default: 1 (0: False, 1: True)
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POWER_TARGET=15 # the target power consumption of the house, default: 50 [Watts]
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POWER_TARGET_MIN=0 # minimum percentage for the inverter output limit, default: 0.0 [%]
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POWER_TARGET_MAX=100 # maximum percentage for the inverter output limit, default: 100.0 [%]
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POWER_DAMPING_FACTOR=0.7 # damping factor for changes of the inverter output limit (between 0-1), default: 0.3
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POWER_LIMIT_CHANGE_TRESHOLD=0.3 # set a treshold for the api calls: they will not be executed if the new limit isn't that much higher, default: 0.5
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POWER_LIMIT_TYPE=1 # the power limit type; DON'T CHANGE if you don't know what you're doing, default: 1 (see https://github.com/tbnobody/OpenDTU/discussions/742)
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PYTHONUNBUFFERED=1 # for use in docker images (for fast logs, ...)
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147
solarcontrol.py
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solarcontrol.py
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#!/usr/bin/python3
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import paho.mqtt.client as mqtt
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import os
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from dotenv import load_dotenv
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from time import time, sleep
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import json
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from threading import Thread
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import requests
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import math
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# let's get colorful!
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class bcolors:
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HEADER = '\033[95m'
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OKBLUE = '\033[94m'
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OKCYAN = '\033[96m'
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OKGREEN = '\033[92m'
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WARNING = '\033[93m'
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FAIL = '\033[91m'
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ENDC = '\033[0m'
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BOLD = '\033[1m'
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UNDERLINE = '\033[4m'
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# get env vars
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load_dotenv()
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mq_broker = os.getenv('MQBROKER', None)
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mq_port = int(os.getenv('MQPORT', None))
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mq_user = os.getenv('MQUSER', None)
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mq_pwd = os.getenv('MQPWD', None)
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mq_topic_p_house = os.getenv('MQTOPIC_P_HOUSE', None)
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mq_topic_p_solar = os.getenv('MQTOPIC_P_SOLAR', None)
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maximum_data_ts_deviation = int(os.getenv('MAXIMUM_DATA_TS_DEVIATION', 5))
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opendtu_address = os.getenv('OPENDTU_ADDR', None)
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opendtu_user = os.getenv('OPENDTU_USER', None)
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opendtu_pwd = os.getenv('OPENDTU_PWD', None)
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opendtu_inverter_sn = os.getenv('OPENDTU_INVERTER_SN', None)
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limit_correction_factor = float(os.getenv('LIMIT_CORRECTION_FACTOR', 1.0))
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limit_update_interval = float(os.getenv('LIMIT_UPDATE_INTERVAL', 5))
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power_target = int(os.getenv('POWER_TARGET', 50))
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power_target_min = float(os.getenv('POWER_TARGET_MIN', 0))
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power_target_max = float(os.getenv('POWER_TARGET_MAX', 100))
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power_damping_factor = float(os.getenv('POWER_DAMPING_FACTOR', 0.3))
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power_limit_change_treshold = float(os.getenv('POWER_LIMIT_CHANGE_TRESHOLD', 0.5))
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power_limit_type = int(os.getenv('POWER_LIMIT_TYPE', 1))
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dry_run = bool(int(os.getenv('DRY_RUN', 1)))
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# some checks for the correctness of supplied data
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if power_target_min < 0: power_target_min = 0
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if power_target_max > 100: power_target_max = 100
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if power_damping_factor < 0: power_damping_factor = 0.0
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if power_damping_factor > 1: power_damping_factor = 1.0
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# create the powers dict (containing the current use) and data variables (for thread sharing)
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powers_raw = {"solar": 0, "solar_ts": 0, "house": 0, "house_ts": 0}
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powers = {"total": None, "total_house": None, "total_solar": None, "timestamp": 0}
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# define mqtt callbacks
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def on_connect(client, userdata, flags, reason_code, properties):
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print(f"{bcolors.OKGREEN}Connected with result code {bcolors.ENDC}{reason_code}")
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client.subscribe("lge320/#")
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client.subscribe("solar/ac/#")
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def on_message(client, userdata, msg):
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#print(f"{msg.topic}: {msg.payload}") # just for debug / development reasons
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if msg.topic == mq_topic_p_house:
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powers_raw["house_ts"] = time()
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powers_raw["house"] = math.floor(((powers_raw["house"] + float(json.loads(msg.payload)["total_act_power"])) / 2)*10)/10
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elif msg.topic == mq_topic_p_solar:
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powers_raw["solar_ts"] = time()
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powers_raw["solar"] = math.floor(((powers_raw["solar"] + float(msg.payload)) / 2)*10)/10
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# initialize the mqtt client
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mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2)
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mqttc.on_connect = on_connect
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mqttc.on_message = on_message
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mqttc.username_pw_set(mq_user, mq_pwd)
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mqttc.connect(mq_broker, mq_port, 60)
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mqttc.loop_start()
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def threaded_current_power_calculation():
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while True:
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last_powers = powers_raw.copy()
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while last_powers == powers_raw:
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sleep(0.2)
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if abs(powers_raw["solar_ts"] - powers_raw["house_ts"]) < maximum_data_ts_deviation and powers_raw["solar"] != None and powers_raw["house"] != None:
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print(f"{bcolors.OKCYAN}Current total P: {bcolors.BOLD}{(powers_raw['solar'] + powers_raw['house']):.2f}{bcolors.ENDC} | {bcolors.WARNING}Solar P: {bcolors.BOLD}{powers_raw['solar']:.2f}{bcolors.ENDC} | {bcolors.OKBLUE}House P: {bcolors.BOLD}{powers_raw['house']:.2f}{bcolors.ENDC}")
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powers["total"] = powers_raw["solar"] + powers_raw["house"]
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powers["total_house"] = powers_raw["house"]
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powers["total_solar"] = powers_raw["solar"]
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powers["timestamp"] = time()
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power_calc_thread = Thread(target=threaded_current_power_calculation)
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power_calc_thread.start()
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def threaded_solar_power_limit_setting():
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last_time = time()
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while True:
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# Get current openDTU current limit status
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status = requests.get(opendtu_address.strip("/") + "/api/limit/status", auth=(opendtu_user, opendtu_pwd)).json().copy()
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while(time() - powers["timestamp"] > 1): # wait until recent data is available
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sleep(0.2)
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if status[opendtu_inverter_sn]["limit_set_status"] == "Ok" and powers["total"] != None:
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# calculate percentage to set the limit to
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new_ideal_limit = math.floor(((powers["total"]-power_target) / status[opendtu_inverter_sn]["max_power"]) * limit_correction_factor * 1000)/10 # * 100 because its a percentage
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if new_ideal_limit > power_target_max: new_ideal_limit = power_target_max
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if new_ideal_limit < power_target_min: new_ideal_limit = power_target_min
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cur_limit = status[opendtu_inverter_sn]["limit_relative"]
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diff_cur_new_limit = cur_limit - new_ideal_limit
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if abs(diff_cur_new_limit) >= power_limit_change_treshold:
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# dampen only when not giving away energy to the provider
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if powers["total_house"] < 0:
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new_dampened_limit = new_ideal_limit
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else:
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new_dampened_limit = cur_limit - (diff_cur_new_limit * (1-power_damping_factor))
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new_dampened_limit = math.floor(new_dampened_limit*10)/10
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if new_dampened_limit > power_target_max: new_dampened_limit = power_target_max
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if new_dampened_limit < power_target_min: new_dampened_limit = power_target_min
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if not dry_run:
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data_to_send = 'data={"serial":"'+opendtu_inverter_sn+'","limit_type":'+str(power_limit_type)+',"limit_value":'+str(new_dampened_limit)+'}'
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r = requests.post(opendtu_address.strip("/") + "/api/limit/config", data=data_to_send, headers={'Content-Type':'text/plain'}, auth=(opendtu_user, opendtu_pwd))
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print(f"Setting new limit over the API: {bcolors.OKBLUE}{bcolors.BOLD}{str(new_dampened_limit)}%{bcolors.ENDC} ({bcolors.OKGREEN}previously: {bcolors.BOLD}{cur_limit}%{bcolors.ENDC} | {bcolors.WARNING}currently targeting: {bcolors.BOLD}{new_ideal_limit}%{bcolors.ENDC})... ", end="")
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#print(f"Current limit: {cur_limit}, new ideal limit: {new_ideal_limit}, new dampened limit: {new_dampened_limit}")
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if json.loads(r.text)["type"] == "success":
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print(bcolors.OKGREEN+"Success!"+bcolors.ENDC)
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else:
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print(f"{bcolors.FAIL}Unsuccessful :( Code: {bcolors.BOLD}{json.loads(r.text)['code']} ({json.loads(r.text)['type']}){bcolors.ENDC}")
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print(r.text) # keep and uncomment for debug reasons
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else:
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print(f"{bcolors.WARNING}Now the new limit would be set over the API (but DRY_RUN is either not specified or True): {str(new_limit)}%")
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while (time() - last_time) < limit_update_interval:
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sleep(0.5)
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last_time = time()
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solar_power_limit_set_thread = Thread(target=threaded_solar_power_limit_setting)
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solar_power_limit_set_thread.start()
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