Add temperature/status display to boiler

boiler.yaml

@@ -10,6 +10,32 @@ esp8266:
 
 logger:
 
+i2c:
+  sda: D3
+  scl: D4
+
+font:
+- file: "fonts/DejaVuSans.ttf"
+  id: font_sans
+  size: 20
+
+display:
+- platform: ssd1306_i2c
+  model: "SSD1306 128x32"
+  id: oled_display
+  lambda: |-
+    it.printf(
+      4, 6,
+      id(font_sans),
+      "%.2f C",
+      id(boiler_temperature).state);
+
+    if (id(furnace_burning).state) {
+      it.filled_circle(112, 16, 12);
+    } else {
+      it.circle(112, 16, 12);
+    }
+
 mqtt:
   broker: homeassistant
   username: esphome
@@ -21,6 +47,7 @@ dallas:
 sensor:
 - platform: dallas
   address: 0x133c2cf648f40728
+  id: boiler_temperature
   name: "Boiler Temperature"
   filters:
   - offset: 3.3
@@ -33,6 +60,7 @@ sensor:
 
 binary_sensor:
 - platform: analog_threshold
+  id: furnace_burning
   name: "Furnace Burning"
   sensor_id: furnace_led_brightness
   threshold: 0.7