Remove TracerTask

Its brewpi.mat output had no consumer - the GUI never subscribed to the
'Tracer' channel, and SudLogTask's run-scoped JSON logs now cover the same
sensor/heater/tc data for actual analysis. Drop the task, its DT_TASK_TRACER
interval, and the wiring in server/brewpi.py.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DkkuG48uHFCGKe6dPSERFk

server/brewpi.py

@@ -13,7 +13,7 @@ from components.plant import Pot
 from components.actor import HeaterFactory, StirrerFactory
 from components.sud import Sud
 from components.sud_forecast import SudForecastEstimator
-from tasks import TaskManager, TempSensorTask, HeaterTask, PotTask, TcTask, StirrerTask, TracerTask, SudTask, SudLogTask
+from tasks import TaskManager, TempSensorTask, HeaterTask, PotTask, TcTask, StirrerTask, SudTask, SudLogTask
 
 import argparse as ap
 
@@ -67,7 +67,6 @@ if __name__ == '__main__':
 
 	DT = config['Controller']['dt']
 	DT_TASK = 1.0 / config['Controller']['sim_warp_factor']
-	DT_TASK_TRACER = DT_TASK / DT
 	theta_amb = config['ambient_temperature']
 	plant_sim = "sim" in config['Controller']['plant_name']
 
@@ -111,9 +110,6 @@ if __name__ == '__main__':
 	# tasks/sud_log.py.
 	taskmgr.add(SudLogTask(sud, tc, heater, heater_task, sud_task, DT_TASK))
 
-	# Tracer
-	taskmgr.add(TracerTask(sensor, heater, tc, DT_TASK_TRACER, dispatcher.msgio_get("Tracer")))
-
 	# Assign data flow
 	# Assign tc control value to heater
 	tc.set_on_changed("y", heater_task.actor)

tasks/__init__.py

@@ -4,6 +4,5 @@ from tasks.heater import *
 from tasks.stirrer import *
 from tasks.pot import *
 from tasks.tempctrl import *
-from tasks.tracer import *
 from tasks.sud import *
 from tasks.sud_log import *

tasks/sud_log.py

@@ -21,9 +21,10 @@ class SudLogTask(ATask):
 	power_eff - see client/brewpi_gui.py's PlotCanvas.sample()), plus
 	the forecast curve it's compared against (tasks/sud.py's SudTask.
 	forecast_t/forecast_theta), for the whole duration of a Sud run -
-	for later offline analysis. One pair of JSON files per run, not the
-	ever-growing, continuously-rewritten .mat tasks/tracer.py's
-	TracerTask already produces independently of any Sud run.
+	for later offline analysis. One pair of JSON files per run, scoped
+	to that run alone - unlike a continuously-rewritten trace file that
+	keeps growing independently of whether a Sud run is even in
+	progress.
 
 	A fresh, uniquely-named pair of logs starts the moment a run
 	actually starts (Sud.state leaves IDLE/DONE) and is written out

tasks/tracer.py

@@ -1,68 +0,0 @@
-import time
-import asyncio
-from tasks import ATask
-from ws.message import MsgIo
-from components import ATemperatureSensor
-from components import AHeater
-from components import APid
-
-import numpy as np
-import scipy.io
-import os
-
-
-class TracerTask(ATask):
-	def __init__(self, sensor: ATemperatureSensor, heater: AHeater, temp_ctrl: APid, interval, msg_handler: MsgIo, path= './logs'):
-		ATask.__init__(self, interval)
-		if not os.path.exists(path):
-			os.makedirs(path)
-
-		self.msg_handler = msg_handler
-		msg_handler.set_recv_handler(self.recv)
-
-		self.sensor = sensor
-		self.heater = heater
-		self.temp_ctrl = temp_ctrl
-		self.path = path
-
-	async def recv(self, data):
-		pass
-
-	async def send(self, data):
-		await self.msg_handler.send(data)
-
-	async def on_process(self):
-		print("{}: Started with interval {} s".format(self.msg_handler.get_key(), self.interval))
-
-		timestamp = 0
-		_timestamp = np.empty(0)
-		_sensor_temp = np.empty(0)
-		_heater_power = np.empty(0)
-		_tc_temp_ist = np.empty(0)
-		_tc_dtemp_ist = np.empty(0)
-		_tc_temp_soll = np.empty(0)
-		_tc_dtemp_soll = np.empty(0)
-		_tc_dtemp_commanded = np.empty(0)
-
-		name = 'brewpi'
-		filename = os.path.join(self.path, '') + name + ".mat"
-		filename_full = os.path.join(self.path, '') + name + "." + time.strftime("%Y%m%d%H%M%S", time.localtime()) + ".mat"
-
-		while True:
-			_timestamp = np.append(_timestamp, timestamp)
-			_sensor_temp = np.append(_sensor_temp, self.sensor.temperature())
-			_heater_power = np.append(_heater_power, self.heater.get_power())
-			_tc_temp_ist = np.append(_tc_temp_ist, self.temp_ctrl.theta_ist)
-			_tc_dtemp_ist = np.append(_tc_dtemp_ist, max(-1, self.temp_ctrl.heatrate_ist))
-			_tc_temp_soll = np.append(_tc_temp_soll, self.temp_ctrl.theta_soll_set)
-			_tc_dtemp_soll = np.append(_tc_dtemp_soll, self.temp_ctrl.heatrate_soll_set)
-			_tc_dtemp_commanded = np.append(_tc_dtemp_commanded, self.temp_ctrl.heatrate_soll)
-
-			data = {'time': _timestamp, 'sensor_temp': _sensor_temp, 'heater_power': _heater_power, 'tc_temp_ist': _tc_temp_ist, 'tc_dtemp_ist': _tc_dtemp_ist, 'tc_temp_soll': _tc_temp_soll, 'tc_dtemp_soll': _tc_dtemp_soll, 'tc_dtemp_commanded': _tc_dtemp_commanded}
-
-			scipy.io.savemat(filename, data)
-			scipy.io.savemat(filename_full, data)
-			timestamp += 1
-			await asyncio.sleep(self.interval)
-
-