add beeper to display

config.py

@@ -49,6 +49,9 @@ gpio_sensor_di = 10 # only used with max31856
 ### value is used.
 sensor_time_wait = 2
 
+# GPIO to use for the beeper
+gpio_beeper = 12
+
 
 ########################################################################
 #
@@ -57,7 +60,7 @@ sensor_time_wait = 2
 # These parameters work well with the simulated oven. You must tune them
 # to work well with your specific kiln. Note that the integral pid_ki is
 # inverted so that a smaller number means more integral action.
-pid_kp = 25   # Proportional 
+pid_kp = 25   # Proportional
 pid_ki = 200  # Integral
 pid_kd = 200  # Derivative
 
@@ -66,11 +69,11 @@ pid_kd = 200  # Derivative
 #
 # Initial heating and Integral Windup
 #
-# During initial heating, if the temperature is constantly under the 
+# During initial heating, if the temperature is constantly under the
 # setpoint,large amounts of Integral can accumulate. This accumulation
 # causes the kiln to run above the setpoint for potentially a long
 # period of time. These settings allow integral accumulation only when
-# the temperature is within stop_integral_windup_margin percent below 
+# the temperature is within stop_integral_windup_margin percent below
 # or above the setpoint. This applies only to the integral.
 stop_integral_windup = True
 stop_integral_windup_margin = 10
@@ -96,20 +99,20 @@ sim_R_ho_air   = 0.05   # K/W  " with internal air circulation
 # If you change the temp_scale, all settings in this file are assumed to
 # be in that scale.
 
-temp_scale          = "f" # c = Celsius | f = Fahrenheit - Unit to display 
+temp_scale          = "f" # c = Celsius | f = Fahrenheit - Unit to display
 time_scale_slope    = "h" # s = Seconds | m = Minutes | h = Hours - Slope displayed in temp_scale per time_scale_slope
 time_scale_profile  = "m" # s = Seconds | m = Minutes | h = Hours - Enter and view target time in time_scale_profile
 
 # emergency shutoff the profile if this temp is reached or exceeded.
 # This just shuts off the profile. If your SSR is working, your kiln will
-# naturally cool off. If your SSR has failed/shorted/closed circuit, this 
+# naturally cool off. If your SSR has failed/shorted/closed circuit, this
 # means your kiln receives full power until your house burns down.
 # this should not replace you watching your kiln or use of a kiln-sitter
-emergency_shutoff_temp = 2264 #cone 7 
+emergency_shutoff_temp = 2264 #cone 7
 
-# If the kiln cannot heat or cool fast enough and is off by more than 
+# If the kiln cannot heat or cool fast enough and is off by more than
 # kiln_must_catch_up_max_error  the entire schedule is shifted until
-# the desired temperature is reached. If your kiln cannot attain the 
+# the desired temperature is reached. If your kiln cannot attain the
 # wanted temperature, the schedule will run forever.
 kiln_must_catch_up = True
 kiln_must_catch_up_max_error = 10 #degrees

kiln-display.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from os import supports_dir_fd
 import websocket
 import json
 import time
@@ -9,7 +8,9 @@ import argparse
 import digitalio
 import board
 import adafruit_rgb_display.st7789 as st7789
+import RPi.GPIO as GPIO
 from PIL import Image, ImageDraw, ImageFont
+import config
 
 # This is designed to drive an Adafruit Mini PiTFT 1.3" (https://www.adafruit.com/product/4484)
 #
@@ -22,10 +23,33 @@ from PIL import Image, ImageDraw, ImageFont
 # non-numpy fallback code will consume much CPU.
 
 
+def beep(delay):
+    GPIO.output(config.gpio_beeper, GPIO.HIGH)
+    time.sleep(delay)
+    GPIO.output(config.gpio_beeper, GPIO.LOW)
+
+
+def morse(code):
+    for c in code:
+        if c == '.':
+            beep(0.25)
+
+        elif c == '-':
+            beep(0.5)
+
+        time.sleep(0.25)
+
+
 def display(hostname, minupdatesecs, font_ttf):
     status_ws = websocket.WebSocket()
     storage_ws = websocket.WebSocket()
 
+    # setup beeper GPIO
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setwarnings(False)
+    GPIO.setup(config.gpio_beeper, GPIO.OUT)
+    GPIO.output(config.gpio_beeper, GPIO.LOW)
+
     # Configuration for CS and DC pins for Raspberry Pi
     cs_pin = digitalio.DigitalInOut(board.CE0)
     dc_pin = digitalio.DigitalInOut(board.D25)
@@ -57,6 +81,7 @@ def display(hostname, minupdatesecs, font_ttf):
     charth = int(display.height / 2)
 
     # main loop
+    state = 'idle'
     cur_profile = None
     last_update = datetime.datetime.now()
     while True:
@@ -82,6 +107,25 @@ def display(hostname, minupdatesecs, font_ttf):
 
             continue
 
+        if state == 'idle' and cur_profile:
+            state = 'profile_tempok'
+
+        elif state != 'idle' and not cur_profile:
+            state = 'idle'
+            morse('-.-.')  # (C) Profile Complete
+
+        if state == 'profile_tempok':
+            tempdelta = abs(msg.get('temperature', 0) - msg.get('target', 0))
+            if tempdelta > 5:
+                state = 'profile_catchup'
+                morse('....')  # (H) Temp bad
+
+        elif state == 'profile_catchup':
+            tempdelta = abs(msg.get('temperature', 0) - msg.get('target', 0))
+            if tempdelta < 1:
+                state = 'profile_tempok'
+                morse('-')  # (T) Temp ok
+
         # we don't need to update ALL the time
         if (datetime.datetime.now() - last_update).total_seconds() < minupdatesecs:
             continue