Dsmr component (#1881)

Co-authored-by: Otto winter <otto@otto-winter.com>

tests/test3.yaml

@@ -594,6 +594,9 @@ sensor:
       name: 'Import Reactive Energy'
     export_reactive_energy:
       name: 'Export Reactive Energy'
+  - platform: dsmr
+    energy_delivered_tariff1:
+      name: dsmr_energy_delivered_tariff1
 
   - platform: nextion
     id: testnumber
@@ -735,6 +738,11 @@ text_sensor:
     id: text0
     update_interval: 4s
     component_name: text0
+  - platform: dsmr
+    identification:
+      name: "dsmr_identification"
+    p1_version:
+      name: "dsmr_p1_version"
 
 script:
   - id: my_script
@@ -1242,3 +1250,7 @@ fingerprint_grow:
         data:
           finger_id: !lambda 'return finger_id;'
   uart_id: uart6
+
+dsmr:
+  decryption_key: 00112233445566778899aabbccddeeff
+  uart_id: uart6