Всё управление скомпоновал в одном методе. Выдаём управляющие команды каждый цикл, чтобы не было эффектов залипания

heat_control.py

@@ -105,10 +105,13 @@ def on_message(client, userdata, msg):
 
 any_opened_start = 0
 any_opened = False
+boiler_out = 0
+pump_out = 0
+
 
 def check_temperatures():
 	"""Check temperatures against target and control GPIO"""
-	global any_opened_start, any_opened
+	global any_opened_start, any_opened, boiler_out, pump_out
 	# check boiler exhaust, turn off if too big
 	if (boiler_exhaust_t > BOILER_EXHAUST_LIMIT):
 		logger.error("Boiler exhaust overheat")
@@ -116,9 +119,9 @@ def check_temperatures():
 		# turn on the pump
 		# and turn off the boiler of course
 		for c in contours:
-			mqtt_client.publish(c.out_topic, "1", retain=True)
-		mqtt_client.publish(boiler_control, "0", retain=True)
-		mqtt_client.publish(pump_control, "1", retain=True)
+			c.check_state(True, True)
+		boiler_out = 0
+		pump_out = 1
 		return
 	#
 	sum_t = 0
@@ -132,9 +135,10 @@ def check_temperatures():
 	if count_t == 0:
 		logger.error("No temperatures available, switch to full-on mode")
 		for c in contours:
-			mqtt_client.publish(c.out_topic, "1", retain=True)
+			c.check_state(True, True)
 		# turn on boiler 
-		mqtt_client.publish(boiler_control, "1", retain=True)
+		boiler_out = 1
+		pump_out = 1
 		return
 
 	for c in contours:
@@ -152,11 +156,6 @@ def check_temperatures():
 		if contour_t > target_t + hysteresis:
 			# should turn off contour
 			c.check_state(False)
-		if c.state:
-			# 0 means "closed"
-			mqtt_client.publish(c.out_topic, "1", retain=True)
-		else:
-			mqtt_client.publish(c.out_topic, "0", retain=True)
 
 	if any_opened:
 		any_opened = False
@@ -171,17 +170,31 @@ def check_temperatures():
 
 	logger.debug("Any opened: " + str(any_opened) + " aos " + str(any_opened_start) + " time " + str(time.time()))
 	if any_opened and time.time() - any_opened_start > BOILER_TURN_ON_AFTER:
-		mqtt_client.publish(boiler_control, "1", retain=True)
-		mqtt_client.publish(pump_control, "1", retain=True)
+		logger.info("Starting up pump and boiler, contours should be opened now")
+		boiler_out = 1
+		pump_out = 1
 	else:
-		mqtt_client.publish(boiler_control, "0", retain=True)
-		mqtt_client.publish(pump_control, "0", retain=True)
+		logger.info("All contours are closed, shutting down boiler and pump")
+		boiler_out = 0
+		pump_out = 0
+
+def issue_commands():
+	for c in contours:
+		if c.state:
+			# 0 means "closed"
+			mqtt_client.publish(c.out_topic, "1", retain=True)
+		else:
+			mqtt_client.publish(c.out_topic, "0", retain=True)
+	mqtt_client.publish(boiler_control, str(boiler_out), retain=True)
+	mqtt_client.publish(pump_control, str(pump_out), retain=True)
+		
 
 def main_cycle():
 	"""Main 5-second cycle"""
 	while True:
 		try:
 			check_temperatures()
+			issue_commands()
 		except Exception as e:
 			logger.error(f"Error in main cycle: {e}")		
 		# Wait 5 seconds