Allow updating pid control params (#1115)

tests/test3.yaml

@@ -169,6 +169,13 @@ api:
       then:
         - tm1651.turn_off:
             id: tm1651_battery
+    - service: pid_set_control_parameters
+      then:
+        - climate.pid.set_control_parameters:
+            id: pid_climate
+            kp: 1.0
+            kd: 1.0
+            ki: 1.0
 
 wifi:
   ssid: 'MySSID'
@@ -681,6 +688,17 @@ climate:
     away_config:
       default_target_temperature_low: 16°C
       default_target_temperature_high: 20°C
+  - platform: pid
+    id: pid_climate
+    name: "PID Climate Controller"
+    sensor: ha_hello_world
+    default_target_temperature: 21°C
+    heat_output: my_slow_pwm
+    control_parameters:
+      kp: 0.0
+      ki: 0.0
+      kd: 0.0
+    
 
 cover:
   - platform: endstop
@@ -761,6 +779,11 @@ output:
     id: dimmer1
     gate_pin: GPIO5
     zero_cross_pin: GPIO12
+  - platform: slow_pwm
+    pin: GPIO5
+    id: my_slow_pwm
+    period: 15s
+
 
 mcp23017:
   id: mcp23017_hub