Add documentation for dsmr config flow (#17757)

source/_integrations/dsmr.markdown

@@ -6,6 +6,7 @@ ha_category:
   - Energy
 ha_release: 0.34
 ha_iot_class: Local Push
+ha_config_flow: true
 ha_domain: dsmr
 ha_codeowners:
   - '@Robbie1221'
@@ -49,77 +50,7 @@ DIY solutions (ESP8266 based):
 
 - [esp8266_p1meter (fliphess)](https://github.com/fliphess/esp8266_p1meter)
 
-```yaml
-# Example configuration.yaml entry
-sensor:
-  - platform: dsmr
-```
-
-{% configuration %}
-  port:
-    description: "Serial port to which Smartmeter is connected via USB. For remote (i.e., ser2net) connections, use TCP port number to connect to (i.e., 2001)."
-    required: false
-    type: string
-    default: "/dev/ttyUSB0"
-  host:
-    description: "Host to which Smartmeter is connected via serial or USB, see **port**. For remote connections, use IP address of host to connect to (i.e., 192.168.1.13)."
-    required: false
-    type: string
-  dsmr_version:
-    description: "Version of DSMR used by meter. Choices: `2.2`, `4`, `5`, `5B` (For Belgian Meter), `5L` (For Smarty Meter)."
-    required: false
-    type: string
-    default: "2.2"
-  reconnect_interval:
-    description: The reconnect interval in seconds when the connection is lost with the Smartmeter.
-    required: false
-    type: integer
-    default: 30
-  precision:
-    description: Defines the precision of the calculated values, through the argument of round().
-    required: false
-    type: integer
-    default: 3
-{% endconfiguration %}
-
-Full configuration examples can be found below:
-
-```yaml
-# Example configuration.yaml entry for USB/serial connected Smartmeter
-sensor:
-  - platform: dsmr
-    port: /dev/ttyUSB1
-    dsmr_version: 5
-
-group:
-  meter_readings:
-    name: Meter readings
-    entities:
-      - sensor.energy_consumption_tarif_1
-      - sensor.energy_consumption_tarif_2
-      - sensor.energy_production_tarif_1
-      - sensor.energy_production_tarif_2
-      - sensor.gas_consumption
-```
-
-```yaml
-# Example configuration.yaml entry for remote (TCP/IP, i.e., via ser2net) connection to host which is connected to Smartmeter
-sensor:
-  - platform: dsmr
-    host: 192.168.1.13
-    port: 2001
-    dsmr_version: 5
-
-group:
-  meter_readings:
-    name: Meter readings
-    entities:
-      - sensor.energy_consumption_tarif_1
-      - sensor.energy_consumption_tarif_2
-      - sensor.energy_production_tarif_1
-      - sensor.energy_production_tarif_2
-      - sensor.gas_consumption
-```
+{% include integrations/config_flow.md %}
 
 Optional configuration example for ser2net: