first feature complete implementation

gbmanager.py

@@ -2,9 +2,9 @@ from machine import Pin, I2C
 from onewire import OneWire
 from ds18x20 import DS18X20
 from time import sleep_ms
-from machine_i2c_lcd import I2cLcd
 from lcd_api import LcdApi
-#from pico_i2c_lcd import I2cLcd
+from pico_i2c_lcd import I2cLcd
+import _thread
 
 # Relais
 relais  = Pin(15, machine.Pin.OUT, value = 1)
@@ -15,18 +15,34 @@ temp_sensor = DS18X20(OneWire(Pin(16)))
 sensor_id   = temp_sensor.scan()[0]
 
 # LCD Display
-#i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=100000)
-#lcd = I2cLcd(i2c, 0x27, 2, 16)
 i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
-lcd_addr = 39
 I2C_ADDR     = 0x27
 I2C_NUM_ROWS = 2
 I2C_NUM_COLS = 16
 lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)
 
-# Text in Zeilen
-line_top = 'Soll: '
-line_bot = 'Ist : '
+# Custom characters
+degree = (
+    0b00111,
+    0b00101,
+    0b00111,
+    0b00000,
+    0b00000,
+    0b00000,
+    0b00000,
+    0b00000,
+    )
+
+# Buttons
+button1 = Pin(2, Pin.IN, Pin.PULL_DOWN)
+button2 = Pin(3, Pin.IN, Pin.PULL_DOWN)
+button3 = Pin(4, Pin.IN, Pin.PULL_DOWN)
+global button1_pressed
+global button2_pressed
+global button3_pressed
+button1_pressed = False
+button2_pressed = False
+button3_pressed = False
 
 def ctrl_relais(active = True):
     if active:
@@ -36,16 +52,65 @@ def ctrl_relais(active = True):
         relais.value(1)
         led_onboard.off()
         
+def button_reader_thread():
+    global button1_pressed
+    global button2_pressed
+    global button3_pressed
+    while True:
+        if button1.value() == 1:
+            button1_pressed = True
+        if button2.value() == 1:
+            button2_pressed = True
+        if button3.value() == 1:
+            button3_pressed = True
+        sleep_ms(100)
+
+lcd.backlight_on()
+lcd.clear()
+lcd.custom_char(0, degree)
+
+temp_tgt = 28.0
+temp_gap = 0.5
+is_heating  = False
+heat_string = ""
+system_on = False
+system_on_string = ""
+
+_thread.start_new_thread(button_reader_thread, ())
 
 while True:
     temp_sensor.convert_temp()
     sleep_ms(750)
-    temp_curr = str(temp_sensor.read_temp(sensor_id))
-    lcd.move_to(0, 0)
-    lcd.putstr(line_top + "\n" + line_bot + temp_curr + " °C")
-    sleep_ms(2000)
+    temp_curr = temp_sensor.read_temp(sensor_id)
         
-    #ctrl_relais(True)
-    #sleep_ms(5000)
-    #ctrl_relais(False)
-    #sleep_ms(5000)
+    if button1_pressed == True:
+        temp_tgt -= 0.5
+        button1_pressed = False
+    if button2_pressed == True:
+        temp_tgt += 0.5
+        button2_pressed = False
+    if button3_pressed == True:
+        system_on = not system_on
+        button3_pressed = False
+
+    if system_on == True and temp_curr < temp_tgt - temp_gap:
+        is_heating = True
+    elif system_on == True and temp_curr > temp_tgt + temp_gap:
+        is_heating = False
+    else:
+        is_heating = False
+    ctrl_relais(is_heating)
+        
+    if system_on == True:
+        system_on_string = "ON "
+    else:
+        system_on_string = "OFF"
+
+    if is_heating == True:
+        heat_string = ">H<"
+    else:
+        heat_string = "   "
+
+    lcd.move_to(0, 0)
+    lcd.putstr("ACT: {0:3.1f}".format(temp_curr) + chr(0) + "C  " + heat_string +
+               "\nTGT: {0:3.1f}".format(temp_tgt) + chr(0) + "C  " + system_on_string)