log: route task/component status output through logging, not print()

AttributeChange (the common base of every ATask and component ABC) now
sets self.log = logging.getLogger(type(self).__name__), so components
no longer need to hand-type their own name into each message. Wired
logging.basicConfig() in server/brewpi.py with a bare "%(name)s:
%(message)s" formatter - Tee (see prior commit) still supplies the
"<date>T<time>:" prefix, so lines read "<date>T<time>:<component>:
<message>" without double-stamping, and third-party loggers
(websockets, asyncio) now get the same formatting for free.

Converted the print() call sites that were standing in for this in
tasks/ and components/ (leaving __main__ demo blocks and explicit
debug-dump helpers alone).

components/actor/heater_hendi.py

@@ -45,7 +45,7 @@ class HeaterHendi(AHeater):
 			# tick loop (with self.device.open(): activate(True)/(False)) and
 			# from a client's Connect/Disconnect command, neither of which
 			# expect activate() itself to ever raise.
-			print(f"HeaterHendi: comm error in activate({enable}): {e}")
+			self.log.error(f"comm error in activate({enable}): {e}")
 			self.disconnect()
 
 	def is_activated(self):
@@ -55,7 +55,7 @@ class HeaterHendi(AHeater):
 			s = self.hendi.isRemoteEnable()
 			return '1' in s
 		except Exception as e:
-			print(f"HeaterHendi: comm error in is_activated: {e}")
+			self.log.error(f"comm error in is_activated: {e}")
 			self.disconnect()
 			return False
 
@@ -72,7 +72,7 @@ class HeaterHendi(AHeater):
 			self.hendi.setPowerWatts(power)
 			self.power_eff = self.hendi.getPowerWatts() if power > 0 else 0
 		except Exception as e:
-			print(f"HeaterHendi: comm error in process: {e}")
+			self.log.error(f"comm error in process: {e}")
 			self.disconnect()
 			self.power_eff = 0
 

components/actor/hendiCtrl.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python3
 
+import logging
 import time
 import serial
 import sys
@@ -11,6 +12,7 @@ class HendiException(Exception):
 
 class HendiCtrl:
 	def __init__(self, port, speed, debug=False):
+		self.log = logging.getLogger(type(self).__name__)
 		self.debug = debug
 		self.prompt = b':'
 		self.sw_id = None
@@ -48,7 +50,7 @@ class HendiCtrl:
 		try:
 			self.ser.open()
 		except serial.SerialException as e:
-			print(f"HendiCtrl: connect failed: {e}")
+			self.log.error(f"connect failed: {e}")
 			return False
 		# The port itself is what "connected" means - a failed version query
 		# (e.g. the device sitting in its ungraceful-disconnect lockout, see
@@ -57,9 +59,9 @@ class HendiCtrl:
 		try:
 			self.sw_id = self.getSoftwareIdentifier()
 			self.sw_ver = self.getSoftwareVersion()
-			print(f"{self.sw_id}, F/W-Version: {self.sw_ver}")
+			self.log.info(f"{self.sw_id}, F/W-Version: {self.sw_ver}")
 		except HendiException:
-			print("HendiCtrl: Hendi not found")
+			self.log.warning("Hendi not found")
 		return True
 
 	@contextmanager
@@ -91,7 +93,7 @@ class HendiCtrl:
 		self.ser.rts = True
 
 	def firmware_update(self, filename):
-		print("Start firmware update")
+		self.log.info("Start firmware update")
 		self.enter_bootloader()
 		self.ser.readline()
 
@@ -122,7 +124,7 @@ class HendiCtrl:
 		self.ser.flushInput()
 		data = s.encode()
 		if self.debug:
-			print(f"HendiCtrl: -> {data!r}")
+			self.log.debug(f"-> {data!r}")
 		self.ser.write(data + b'\r')
 
 	def __read(self):
@@ -132,7 +134,7 @@ class HendiCtrl:
 		# Read answer line
 		answer_raw = self.ser.readline()
 		if self.debug:
-			print(f"HendiCtrl: <- echo={echo!r} answer={answer_raw!r}")
+			self.log.debug(f"<- echo={echo!r} answer={answer_raw!r}")
 		answer = answer_raw.decode('utf-8').replace('\r', '').replace('\n', '')
 		if ':' in answer:
 			result = answer.split(':')

components/actor/pololu1376.py

@@ -1,3 +1,4 @@
+import logging
 import time
 import serial
 import enum
@@ -68,6 +69,7 @@ class StatusError(enum.IntFlag):
 
 class Pololu1376:
 	def __init__(self, serial_port):
+		self.log = logging.getLogger(type(self).__name__)
 		# Deferred-open pyserial idiom: serial_port is constructed with no
 		# port set (see components/actor/stirrerpololu1376.py), so it isn't
 		# actually opened until connect() is called - a missing/unplugged
@@ -88,7 +90,7 @@ class Pololu1376:
 				self.ser.close()
 				self.ser.open()
 			except serial.SerialException as e:
-				print(f"Pololu1376: connect failed: {e}")
+				self.log.error(f"connect failed: {e}")
 				return False
 		# set_output_flow_control() requires the port to already be open -
 		# can only happen here, after open() above, not at construction time.
@@ -96,10 +98,10 @@ class Pololu1376:
 		try:
 			self.stop()
 			self.firmware_version = self.get_firmware_version()
-			print("Pololu1376 F/W-Version:", self.firmware_version)
+			self.log.info("F/W-Version: {}".format(self.firmware_version))
 			return True
 		except Exception as e:
-			print(f"Pololu1376: connect failed: {e}")
+			self.log.error(f"connect failed: {e}")
 			self.ser.close()
 			self.firmware_version = None
 			return False
@@ -142,7 +144,7 @@ class Pololu1376:
 		rsp = self.cmd("GO")
 		errors = self.get_status_errors()
 		if errors:
-			print(f"Pololu1376: ERROR - still in fail-safe after GO, active errors: {errors!r}")
+			self.log.error(f"still in fail-safe after GO, active errors: {errors!r}")
 		return rsp
 
 	def stop(self):

components/actor/stirrerpololu1376.py

@@ -46,7 +46,7 @@ class StirrerPololu1376(AStirrer):
 		if not self.connected:
 			return
 		try:
-			print("activate {}".format(enable))
+			self.log.debug("activate {}".format(enable))
 			if enable:
 				self.drv.go()
 			else:
@@ -58,7 +58,7 @@ class StirrerPololu1376(AStirrer):
 			# loop (with self.device.open(): activate(True)/(False)) and
 			# from a client's Connect/Disconnect command, neither of which
 			# expect activate() itself to ever raise.
-			print(f"StirrerPololu1376: comm error in activate({enable}): {e}")
+			self.log.error(f"comm error in activate({enable}): {e}")
 			self.disconnect()
 
 	def _on_set_speed(self, speed):
@@ -66,9 +66,9 @@ class StirrerPololu1376(AStirrer):
 			return
 		try:
 			self.drv.motor_forward(speed)
-			print("Set speed to {} %".format(speed))
+			self.log.debug("Set speed to {} %".format(speed))
 		except Exception as e:
-			print(f"StirrerPololu1376: comm error in _on_set_speed: {e}")
+			self.log.error(f"comm error in _on_set_speed: {e}")
 			self.disconnect()
 
 	def _on_process(self):
@@ -77,12 +77,12 @@ class StirrerPololu1376(AStirrer):
 		try:
 			errors = self.drv.get_status_errors()
 			if errors:
-				print(f"StirrerPololu1376: motor controller reports errors: {errors!r}")
+				self.log.warning(f"motor controller reports errors: {errors!r}")
 				if StatusError.SAFE_START_VIOLATION in errors:
-					print("Recover after safe start violation!")
+					self.log.warning("Recover after safe start violation!")
 					self.drv.go()
 		except Exception as e:
-			print(f"StirrerPololu1376: comm error in _on_process: {e}")
+			self.log.error(f"comm error in _on_process: {e}")
 			self.disconnect()