UART commands for getting dish temperature

micro_ondes/esp_lora/lib/microwaveScreen.py

@@ -100,7 +100,7 @@ class MicrowaveScreen:
                 self.h_centered_text(f"{minutes:02}:{seconds:02}", 40, 1)
             
             # Current dish temperature
-            if cooking_state.current_dish_temp is not None:
+            if cooking_state.current_dish_temp is not None and cooking_state.current_dish_temp is not 0.0:
                 self.display.blit(fb_image_weather_temperature_bits, 27, 2)
                 self.display.text(str(int(cooking_state.current_dish_temp)), 37, 6, 1)
                 self.display.ellipse(54, 6, 1, 1, 1, False)

micro_ondes/esp_lora/main.py

@@ -6,6 +6,7 @@ from lib.microwaveScreen import MicrowaveScreen
 import uasyncio as asyncio
 from machine import Pin, SoftI2C
 import ssd1306
+import ujson
 
 # Clean memory immediately
 gc.collect()
@@ -32,6 +33,9 @@ uart_device = None
 magnetron_led = None
 microwave_screen = None
 defrost_mode = False
+current_temp = [None, None]
+last_temp = [None, None]
+temperature_asked = False
 
 
 PING_PAYLOAD = {
@@ -100,7 +104,36 @@ def lora_hardware_thread():
 
 # --- COOKING STATE CALLBACKS ---
 def cooking_state_temperature_provider():
-    return 22.0, 29.0  # TODO: Replace with real temperature reading
+    global current_temp, last_temp, temperature_asked, uart_device
+    
+    def temp_is_none(temp):
+        return temp is None or temp[0] is None or temp[1] is None
+    
+    # Return the current temperature if available, 
+    # otherwise return the last recorded temperature 
+    # and request a new reading from the WiFi board.
+    if temp_is_none(current_temp):
+        if temp_is_none(last_temp):
+            temps = (0.0, 0.0)
+            print("[CookingState] No temperature data available. Returning default (0.0, 0.0).")
+        else:
+            temps = [last_temp[0], last_temp[1]]
+            print(f"[CookingState] Returning last known temperature: {temps}")
+        
+        # Asks the esp-wifi the temperature over UART
+        if not temperature_asked:
+            temperature_asked = True
+            uart_device.send_as_command(UARTCommand(UARTCommandType.TEMPERATURE_REQUEST, {}))
+            print("[CookingState] Requested new temperature reading from WiFi board.")
+    else:
+        print(f"[CookingState] Returning current temperature: {current_temp}")
+        temps = [current_temp[0], current_temp[1]]
+        last_temp[0] = current_temp[0]
+        last_temp[1] = current_temp[1]
+        current_temp[0] = None
+        current_temp[1] = None
+    
+    return temps
 
 def cooking_state_on_state_change(state):
     print(f"[CookingState] State changed to: {state.state}")
@@ -134,7 +167,7 @@ def cooking_state_on_pause(state):
 
 async def uart_polling_task():
     """Polls UART for incoming messages from the WiFi board."""
-    global cooking_state
+    global cooking_state, temperature_asked
     
     while True:
         if uart_device and uart_device.any():
@@ -145,6 +178,8 @@ async def uart_polling_task():
                     params = command.payload
                     print(f"[UART Task] Cooking parameters received: {params}")
                     
+                    uart_device.send_as_command(UARTCommand(UARTCommandType.TEMPERATURE_REQUEST, {}))
+                    
                     cooking_state = cookingState.CookingState(
                         cook_time=params["cook_time"],
                         power_level=params["power_level"],
@@ -155,8 +190,13 @@ async def uart_polling_task():
                     cooking_state.set_refresh_callback(cooking_state_on_refresh)
                     cooking_state.set_pause_callback(cooking_state_on_pause)
                     
-                    await asyncio.sleep_ms(20) 
+                    await asyncio.sleep_ms(200) 
                     cooking_state_on_state_change(cooking_state)
+                elif command.command_type == UARTCommandType.TEMPERATURE_RESPONSE:
+                    payload = ujson.loads(command.payload)
+                    current_temp[0] = payload["dish_temp"]
+                    current_temp[1] = payload["ambient_temp"]
+                    temperature_asked = False
                 else:
                     print(f"[UART Task] Unknown command type received: {command.command_type}")
                     

micro_ondes/esp_wifi/main.py

@@ -195,14 +195,16 @@ async def uart_task():
             try:
                 cmd = uart_device.read_as_command()
 
-                if cmd:
+                if cmd and hasattr(cmd, "command_type"):
                     print("[UART] Command received from LoRa board:", cmd.command_type, cmd.payload)
-                    if (
+                    if cmd.command_type == UARTCommandType.COOKING_STATE_UPDATE:
-                        hasattr(cmd, "command_type")
-                        and cmd.command_type == UARTCommandType.COOKING_STATE_UPDATE
-                    ):
                         if cooking_state:
                             cooking_state.set_state(cmd.payload.get("state"))
+                    elif cmd.command_type == UARTCommandType.TEMPERATURE_REQUEST:
+                        uart_device.send_as_command(UARTCommand(UARTCommandType.TEMPERATURE_RESPONSE, payloads.lora_sensor_data(
+                            mlx_temperature_sensor.read_object_temp() if mlx_temperature_sensor else 0,
+                            mlx_temperature_sensor.read_ambient_temp() if mlx_temperature_sensor else 0
+                        )))
             except Exception as e:
                 print("[UART Task] Error reading command:", e)
 

shared/payloads.py

@@ -39,6 +39,12 @@ def mqtt_sensor_data(id_microwave, dish_temp, ambient_temp):
         "ambient_temp": ambient_temp
     })
     
+def lora_sensor_data(dish_temp, ambient_temp):
+    return as_json({
+        "dish_temp": dish_temp,
+        "ambient_temp": ambient_temp
+    })
+    
 def mqtt_cooking_config(id_microwave, cook_time, power_level, target_temp):
     return as_json({
         "id_microwave": id_microwave,

shared/uart_comm.py

@@ -97,4 +97,6 @@ class UARTCommand:
 class UARTCommandType:
     """Enumeration of known UART command types."""
     COOKING_PARAMS = "COOKING_PARAMS"
-    COOKING_STATE_UPDATE = "COOKING_STATE_UPDATE"
+    COOKING_STATE_UPDATE = "COOKING_STATE_UPDATE"
+    TEMPERATURE_REQUEST = "TEMPERATURE_REQUEST"
+    TEMPERATURE_RESPONSE = "TEMPERATURE_RESPONSE"