Update switch.snmp.markdown (#5483)

* Update switch.snmp.markdown

Depends on https://github.com/home-assistant/home-assistant/pull/14754

* ✏️ Removed old configuration variables header

source/_components/switch.snmp.markdown

@@ -15,7 +15,7 @@ ha_release: 0.57
 
 The `snmp` switch platform allows you to control SNMP-enabled equipment.
 
-Currently, only SNMP OIDs that accept integer values are supported. SNMP v1 and v2c are supported. SNMP v3 is **not** supported.
+Currently, only SNMP OIDs that accept integer values are supported. SNMP v1, v2c and v3 are supported.
 
 To use an SNMP switch in your installation:
 
@@ -27,30 +27,123 @@ switch:
     baseoid: 1.3.6.1.4.1.19865.1.2.1.4.0
 ```
 
-Configuration variables:
-
-- **baseoid** (*Required*): The SNMP BaseOID which to poll for the state of the switch.
-- **command_oid** (*Optional*): The SNMP OID which to set in order to turn the switch on and off, if different from `baseoid`.
-- **host** (*Optional*): The IP/host which to control. Defaults to `localhost`.
-- **port** (*Optional*): The port on which to communicate. Defaults to `161`.
-- **community** (*Optional*): community string to use for authentication. Defaults to `private`.
-- **version** (*Optional*): SNMP version to use - either `1` or `2c`. Defaults to `1`.
-- **payload_on** (*Optional*): What return value represents an `On` state for the switch. The same value is used in writes to turn on the switch if `command_payload_on` is not set. Defaults to `1`.
-- **payload_off** (*Optional*): What return value represents an `Off` state for the switch. The same value is used in writes to turn off the switch if `command_payload_off` is not set. Defaults to `0`.
-- **command_payload_on** (*Optional*): The value to write to turn on the switch, if different from `payload_on`.
-- **command_payload_off** (*Optional*): The value to write to turn off the switch, if different from `payload_off`.
+{% configuration %}
+baseoid:
+  description: The SNMP BaseOID which to poll for the state of the switch.
+  required: true
+  type: string
+command_oid:
+  description: The SNMP OID which to set in order to turn the switch on and off, if different from `baseoid`.
+  required: false
+  type: string
+host:
+  description: The IP/host which to control.
+  required: false
+  type: string
+  default: 'localhost'
+port:
+  description: The port on which to communicate.
+  required: false
+  type: string
+  default: '161'
+community:
+  description: community string to use for authentication (SNMP v1 and v2c).
+  required: false
+  type: string
+  default: 'private'
+username:
+  description: Username to use for authentication.
+  required: false
+  type: string
+  default: ''
+auth_key:
+  description: Authentication key to use for SNMP v3.
+  required: false
+  type: string
+  default: no key
+auth_protocol:
+  description: Authentication protocol to use for SNMP v3.
+  required: false
+  type: string
+  default: 'none'
+priv_key:
+  description: Privacy key to use for SNMP v3.
+  required: false
+  type: string
+  default: no key
+priv_protocol:
+  description: Privacy protocol to use for SNMP v3.
+  required: false
+  type: string
+  default: 'none'
+version:
+  description: SNMP version to use - either `1`, `2c` or `3`.
+  required: false
+  type: string
+  default: '1'
+payload_on:
+  description: What return value represents an `On` state for the switch. The same value is used in writes to turn on the switch if `command_payload_on` is not set.
+  required: false
+  type: string
+  default: '1'
+payload_off:
+  description: What return value represents an `Off` state for the switch. The same value is used in writes to turn off the switch if `command_payload_off` is not set.
+  required: false
+  type: string
+  default: '0'
+command_payload_on:
+  description: The value to write to turn on the switch, if different from `payload_on`.
+  required: false
+  type: string
+command_payload_off:
+  description: The value to write to turn off the switch, if different from `payload_off`.
+  required: false
+  type: string
+{% endconfiguration %}
 
 You should check with your device's vendor to find out the correct BaseOID and what values turn the switch on and off.
 
-A complete example:
+Valid values for auth_protocol:
+
+- **none**
+- **hmac-md5**
+- **hmac-sha**
+- **hmac128-sha224**
+- **hmac192-sha256**
+- **hmac256-sha384**
+- **hmac384-sha512**
+
+Valid values for priv_protocol:
+
+- **none**
+- **des**
+- **3des-ede**
+- **aes-cfb-128**
+- **aes-cfb-192**
+- **aes-cfb-256**
+
+Complete examples:
 
 ```yaml
 switch:
   - platform: snmp
-    name: SNMP switch
+    name: SNMP v1 switch
     host: 192.168.0.2
     community: private
     baseoid: 1.3.6.1.4.1.19865.1.2.1.4.0
     payload_on: 1
     payload_off: 0
+
+  - platform: snmp
+    name: SNMP v3 switch
+    host: 192.168.0.3
+    version: '3'
+    username: 'myusername'
+    auth_key: 'myauthkey'
+    auth_protocol: 'hmac-sha'
+    priv_key: 'myprivkey'
+    priv_protocol: 'aes-cfb-128'
+    baseoid: 1.3.6.1.4.1.19865.1.2.1.4.0
+    payload_on: 1
+    payload_off: 0
 ```