diff --git a/README.md b/README.md
index 53592c1..f044eda 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ Ziel des Projekts ist es, eine WLAN-Schnittstelle zu entwickeln um zusätzliche
   
 ![GitHub all releases](https://img.shields.io/github/downloads/steff393/wbec/total?color=blue&style=flat-square)  
 
+## API
+Die Vollständige API Dokumentation befindet sich in der Datei [api.swagger.yaml](./api.swagger.yaml). 
+Eine Formatierte Version ist unter [petstore.swagger.io](https://petstore.swagger.io/?url=https://raw.githubusercontent.com/steff393/wbec/master/api.swagger.yaml) verfügbar.
+
 ## Funktionen
 - Anbindung an openWB, EVCC, Solaranzeige
 - MQTT-Kommunikation mit openWB und EVCC (ideal für mehrere Ladestationen)
diff --git a/api.swagger.yaml b/api.swagger.yaml
new file mode 100644
index 0000000..086874e
--- /dev/null
+++ b/api.swagger.yaml
@@ -0,0 +1,801 @@
+openapi: 3.0.3
+info:
+  title: WBEC API
+  description: API for controlling WBEC.
+  version: 1.0.0
+  contact:
+    name: steff393
+    url: https://github.com/steff393/wbec
+servers:
+  - url: http://{hostname}
+    variables:
+      hostname:
+        default: wbec.local
+        description: IP address or hostname of the WBEC device
+paths:
+  /:
+    get:
+      tags:
+        - HTML
+      summary: Simple web interface
+      description: Provides a simple web interface to read values and set the load current.
+      responses:
+        '200':
+          description: HTML page displaying internal values and a form to set load current.
+          content:
+            text/html:
+              schema:
+                type: string
+  /heap:
+    get:
+      tags:
+        - System
+      summary: Get free heap memory
+      description: Returns the current free heap memory of the ESP8266.
+      responses:
+        '200':
+          description: Free heap memory in bytes.
+          content:
+            text/plain:
+              schema:
+                type: string
+  /json:
+    get:
+      tags:
+        - API
+      summary: Get all internal values
+      description: >-
+        Retrieves all internal system values in JSON format. Supports query
+        parameters to filter the data.
+      parameters:
+        - name: id
+          in: query
+          description: Zero-based index to get the values of a specific box (0-15).
+          required: false
+          schema:
+            type: integer
+            example: 2
+        - name: wdTmOut
+          in: query
+          description: Timeout value for the watchdog timer.
+          required: false
+          schema:
+            type: integer
+            example: 60000
+        - name: standby
+          in: query
+          description: Standby Function Control (0 or 4).
+          required: false
+          schema:
+            type: integer
+            enum: [0, 4]
+            example: 4
+        - name: remLock
+          in: query
+          description: Value to set/remove remote lock.
+          required: false
+          schema:
+            type: integer
+            enum: [0, 1]
+            example: 1
+        - name: currLim
+          in: query
+          description: Current limit in 1/10 Amperes.
+          required: false
+          schema:
+            type: integer
+            example: 160
+        - name: currFs
+          in: query
+          description: Current frequency setting.
+          required: false
+          schema:
+            type: integer
+            example: 0
+        - name: pvMode
+          in: query
+          description: PV charging mode (0-3).
+          required: false
+          schema:
+            type: integer
+            example: 2
+        - name: pvWbId
+          in: query
+          description: PV system ID (0-15).
+          required: false
+          schema:
+            type: integer
+            example: 1
+        - name: pvWatt
+          in: query
+          description: Power generated by the PV system in watts.
+          required: false
+          schema:
+            type: integer
+            example: 4386
+      responses:
+        '200':
+          description: JSON object containing internal values.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/JsonResponse'
+  /edit:
+    get:
+      tags:
+        - HTML
+      summary: List files in LittleFS
+      description: Displays the list of files stored in the LittleFS.
+      responses:
+        '200':
+          description: List of files.
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  type: string
+  /cfg:
+    get:
+      tags:
+        - API
+      summary: Get cfg.json content
+      description: Returns the content of the `cfg.json` file for testing purposes.
+      responses:
+        '200':
+          description: Configuration content in JSON format.
+          content:
+            application/json:
+              schema:
+                type: object
+                additionalProperties: true
+  /reset:
+    get:
+      tags:
+        - System
+      summary: Trigger system reset
+      description: Triggers a system reset.
+      responses:
+        '200':
+          description: System resetting, no response content.
+          content:
+            text/plain:
+              schema:
+                type: string
+                example: "Resetting the ESP8266..."
+  /resetwifi:
+    get:
+      tags:
+        - System
+      summary: Reset WiFi credentials
+      description: Resets all WiFi credentials (used mainly for testing).
+      responses:
+        '200':
+          description: WiFi credentials reset, no response content.
+          content:
+            text/plain:
+              schema:
+                type: string
+                example: "WiFi credentials deleted!"
+  /status:
+    get:
+      tags:
+        - API
+      summary: Get system status
+      description: >-
+        Provides a subset of values needed for openWB/EVCC integration. Supports
+        query parameter to access a specific box.
+      parameters:
+        - name: box
+          in: query
+          description: Zero-based index to directly access a specific box (0-15).
+          required: false
+          schema:
+            type: integer
+            example: 0
+      responses:
+        '200':
+          description: Status information in JSON format.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StatusResponse'
+  /mqtt:
+    get:
+      tags:
+        - API
+      summary: Send MQTT command
+      description: Sends a command via MQTT to control the system or wallbox.
+      parameters:
+        - name: payload
+          in: query
+          description: Command payload (e.g., `alw=1` to allow charging).
+          required: false
+          schema:
+            type: string
+            example: alw=1
+        - name: box
+          in: query
+          description: Zero-based index to access a specific box (0-15).
+          required: false
+          schema:
+            type: integer
+            example: 0
+      responses:
+        '200':
+          description: MQTT command executed successfully.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/StatusResponse'
+  /update:
+    get:
+      tags:
+        - System
+      summary: Trigger firmware update
+      description: >-
+        Starts the firmware update process. In some test versions, available as
+        `/ota`.
+      responses:
+        '200':
+          description: Firmware update started.
+  /bootlog:
+    get:
+      tags:
+        - System
+      summary: Get debug log
+      description: Returns the current debug buffer.
+      responses:
+        '200':
+          description: Debug log data.
+          content:
+            text/plain:
+              schema:
+                type: string
+  /bootlog_reset:
+    get:
+      tags:
+        - System
+      summary: Clear debug log
+      description: Clears the current debug buffer.
+      responses:
+        '200':
+          description: Debug buffer cleared.
+          content:
+            text/plain:
+              schema:
+                type: string
+                example: "Cleared"
+  /gpio:
+    get:
+      tags:
+        - API
+      summary: Get or set GPIO pin D3
+      description: Retrieves the status of GPIO pin D3 or allows changing its state.
+      parameters:
+        - name: 'on'
+          in: query
+          description: Turns on GPIO pin D3.
+          required: false
+          schema:
+            type: boolean
+        - name: 'off'
+          in: query
+          description: Turns off GPIO pin D3.
+          required: false
+          schema:
+            type: boolean
+      responses:
+        '200':
+          description: Status or confirmation of GPIO pin state.
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  D3:
+                    type: integer
+                    description: State of GPIO pin D3 (0 or 1)
+                    example: 1
+                  D7:
+                    type: integer
+                    description: State of GPIO pin D7 (0 or 1)
+                    example: 0
+            text/plain:
+              schema:
+                type: string
+                example: "Not possible, RFID active!"
+  /pv:
+    get:
+      tags:
+        - API
+      summary: Get or set PV system data
+      description: >-
+        Retrieves or sets current data from the PV system. Supports query
+        parameters to filter the data.
+      parameters:
+        - name: pvMode
+          in: query
+          description: PV charging mode (0-3).
+          required: false
+          schema:
+            type: integer
+            example: 2
+        - name: pvWbId
+          in: query
+          description: PV system ID (0-15).
+          required: false
+          schema:
+            type: integer
+            example: 1
+        - name: pvWatt
+          in: query
+          description: Power generated by the PV system in watts.
+          required: false
+          schema:
+            type: integer
+            example: 4386
+      responses:
+        '200':
+          description: PV system data in JSON format.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/PvResponse'
+  /phaseCtrl:
+    get:
+      tags:
+        - API
+      summary: Control phases
+      description: >-
+        Allows controlling the phases of the system based on the provided
+        parameter.
+      parameters:
+        - name: ph
+          in: query
+          description: Phase control value.
+          required: false
+          schema:
+            type: integer
+            example: 1
+      responses:
+        '200':
+          description: Confirmation of phase control action.
+          content:
+            text/plain:
+              schema:
+                type: string
+  /inverter:
+    get:
+      tags:
+        - API
+      summary: Get inverter status
+      description: Retrieves the status of the inverter.
+      responses:
+        '200':
+          description: Inverter status information in JSON format.
+          content:
+            application/json:
+              schema:
+                type: object
+                additionalProperties: true
+  /log.html:
+    get:
+      tags:
+        - HTML
+      summary: Get logs in HTML
+      description: Retrieves the load logs in HTML format.
+      responses:
+        '200':
+          description: HTML page displaying the load logs.
+          content:
+            text/html:
+              schema:
+                type: string
+  /time.html:
+    get:
+      tags:
+        - HTML
+      summary: Time control options
+      description: Displays the time control options for the wallbox.
+      responses:
+        '200':
+          description: HTML page displaying the time control options logs.
+          content:
+            text/html:
+              schema:
+                type: string
+  /cfg.html:
+    get:
+      tags:
+        - HTML
+      summary: Configuration options
+      description: Displays the configuration options for the wallbox.
+      responses:
+        '200':
+          description: HTML page displaying the configuration options.
+          content:
+            text/html:
+              schema:
+                type: string
+  /chargelog:
+    get:
+      tags:
+        - API
+      summary: Get load logs
+      description: >-
+        Retrieves load logs in JSON format. Supports query parameters to filter
+        the logs.
+      parameters:
+        - name: id
+          in: query
+          description: Log ID to start retrieving logs from.
+          required: false
+          schema:
+            type: integer
+            example: 0
+        - name: len
+          in: query
+          description: Number of logs to retrieve.
+          required: false
+          schema:
+            type: integer
+            example: 10
+      responses:
+        '200':
+          description: JSON object containing load logs.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ChargeLogResponse'
+components:
+  schemas:
+    StatusResponse:
+      type: object
+      properties:
+        car:
+          type: string
+          description: >
+            Charging state of the vehicle. - "0" means no car is connected. -
+            "1" means car is connected.
+          example: '0'
+        err:
+          type: string
+          description: Error code indicating the current error state.
+          example: '0'
+        alw:
+          type: string
+          description: Allow charging status.
+          example: '0'
+        amp:
+          type: string
+          description: Current amperage.
+          example: '0'
+        stp:
+          type: string
+          description: Stop status.
+          example: '0'
+        tmp:
+          type: string
+          description: Temperature reading.
+          example: '0'
+        dws:
+          type: string
+          description: Day/night switch status.
+          example: '0'
+        ubi:
+          type: string
+          description: Ubiquity status.
+          example: '0'
+        eto:
+          type: string
+          description: Estimated time remaining.
+          example: '0'
+        nrg:
+          type: array
+          items:
+            type: integer
+          description: Array of energy readings.
+          example:
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+            - 0
+        fwv:
+          type: string
+          description: Firmware version.
+          example: '40'
+    JsonResponse:
+      type: object
+      properties:
+        wbec:
+          $ref: '#/components/schemas/WbecDetails'
+        box:
+          type: array
+          items:
+            $ref: '#/components/schemas/BoxDetails'
+        modbus:
+          $ref: '#/components/schemas/ModbusDetails'
+        rfid:
+          $ref: '#/components/schemas/RfidDetails'
+        pv:
+          $ref: '#/components/schemas/PvDetails'
+        wifi:
+          $ref: '#/components/schemas/WifiDetails'
+    PvResponse:
+      type: object
+      properties:
+        box:
+          $ref: '#/components/schemas/BoxDetails'
+        modbus:
+          $ref: '#/components/schemas/ModbusDetails'
+        pv:
+          $ref: '#/components/schemas/PvDetails'
+    WbecDetails:
+      type: object
+      properties:
+        version:
+          type: string
+          description: wbec version.
+          example: v0.3.0
+        bldDate:
+          type: string
+          description: wbec build date.
+          example: 2021-06-10
+        timeNow:
+          type: string
+          description: Current time in the system.
+          example: '20:03:19'
+        enwg14a:
+          type: integer
+          description: Status of §14a EnWG throttling.
+          example: 0
+        enwgErr:
+          type: integer
+          description: Error with §14a EnWG functionality.
+          example: 0
+    BoxDetails:
+      type: object
+      properties:
+        busId:
+          type: integer
+          description: Modbus bus id (as configured by DIP switches).
+          example: 1
+        version:
+          type: string
+          description: |
+            Modbus Register-Layouts Version, e.g. 1.0.8.
+            - https://www.amperfied.de/wp-content/uploads/2022/06/ModBus-Register-Tabelle.pdf
+            - https://www.amperfied.de/wp-content/uploads/2023/03/20220809_AMP-Erweiterte-ModBus-Registerbeschreibung.pdf
+          example: '108'
+        chgStat:
+          type: integer
+          description: |
+            Charging State.
+            - 2: State A1, No Vehicle plugged, Wallbox doesn't allow charging
+            - 3: State A2, No Vehicle plugged, Wallbox allows charging
+            - 4: State B1, Vehicle plugged without charging request, Wallbox doesn't allow charging
+            - 5: State B2, Vehicle plugged without charging request, Wallbox allows charging
+            - 6: State C1, Vehicle plugged with charging request, Wallbox doesn't allow charging
+            - 7: State C2, Vehicle plugged with charging request, Wallbox allows charging
+            - 8 --- Derating
+            - 9: State E, Error
+            - 10: State F, Wallbox locked or not ready
+            - 11 --- Error
+          example: 2
+        currL1:
+          type: number
+          description: L1 - Current RMS (in 0.1A).
+          example: 0
+        currL2:
+          type: number
+          description: L2 - Current RMS (in 0.1A).
+          example: 0
+        currL3:
+          type: number
+          description: L3 - Current RMS (in 0.1A).
+          example: 0
+        pcbTemp:
+          type: integer
+          description: PCB temperature (in 0.1°C).
+          example: 333
+        voltL1:
+          type: integer
+          description: Voltage L1 - N rms in Volt.
+          example: 232
+        voltL2:
+          type: integer
+          description: Voltage L2 - N rms in Volt.
+          example: 9
+        voltL3:
+          type: integer
+          description: Voltage L3 - N rms in Volt.
+          example: 9
+        extLock:
+          type: integer
+          description: |
+            Extern lock state.
+            - 0: System locked
+            - 1: System unlocked
+          example: 1
+        power:
+          type: number
+          description: Power (L1+L2+L3) in VA.
+          example: 0
+        energyP:
+          type: number
+          description: Energy since PowerOn (in kWh).
+          example: 0
+        energyI:
+          type: number
+          description: Energy since Installation (in kWh).
+          example: 0.003
+        energyC:
+          type: number
+          description: Energy since Car is plugged (in kWh).
+          example: 0
+        currMax:
+          type: number
+          description: Hardware configuration maximal current (in 0.1A).
+          example: 16
+        currMin:
+          type: number
+          description: Hardware configuration minimal current (in 0.1A).
+          example: 6
+        logStr:
+          type: string
+          description: Log string in format "<item no> <mfgDate> <serial>".
+          example: "00.000.0000/00 0000 000000"
+        wdTmOut:
+          type: integer
+          description: ModBus-Master WatchDog Timeout (in ms).
+          example: 15000
+        standby:
+          type: integer
+          description: | 
+            Standby Function Control.
+            - 0: active
+            - 4: inactive (recommended)
+          example: 4
+        remLock:
+          type: integer
+          description: Remote lock (only if extern lock unlocked).
+          example: 1
+        currLim:
+          type: number
+          description: Maximal current command.
+          example: 130
+        currFs:
+          type: number
+          description: FailSafe Current configuration.
+          example: 0
+        lmReq:
+          type: number
+          description: Load management request.
+          example: 0
+        lmLim:
+          type: number
+          description: Load management limit.
+          example: 0
+        load:
+          type: number
+          description: wbec load management.
+          example: 0
+        resCode:
+          type: string
+          description: Result code of last Modbus message (0 = ok).
+          example: '0'
+        failCnt:
+          type: integer
+          description: Failure count.
+          example: 0
+    ModbusDetails:
+      type: object
+      properties:
+        state:
+          type: object
+          properties:
+            lastTm:
+              type: integer
+              description: Timestamp of last Modbus message (in ms).
+              example: 2852819
+            millis:
+              type: integer
+              description: Time since start of wbec (in ms).
+              example: 2855489
+    RfidDetails:
+      type: object
+      properties:
+        enabled:
+          type: boolean
+          description: RFID enabled status.
+          example: false
+        release:
+          type: boolean
+          description: RFID release status.
+          example: false
+        lastId:
+          type: string
+          description: Last RFID ID.
+          example: ''
+    PvDetails:
+      type: object
+      properties:
+        mode:
+          type: integer
+          description: PV system mode (0-3).
+          example: 2
+        watt:
+          type: integer
+          description: Power generated by the PV system in watts.
+          example: 4386
+        wbId:
+          type: integer
+          description: Id of wallbox that is controlled by pv.
+          example: 1
+        batt:
+          type: number
+          description: Battery status or charge level.
+          example: 0
+    WifiDetails:
+      type: object
+      properties:
+        mac:
+          type: string
+          description: MAC address of the WiFi module.
+          example: '00:1F:3F:15:29:7E'
+        rssi:
+          type: integer
+          description: WLAN signal strength (in dBm).
+          example: -76
+        signal:
+          type: integer
+          description: WiFi signal quality (in %).
+          example: 48
+        channel:
+          type: integer
+          description: WiFi channel.
+          example: 11
+    ChargeLogEntry:
+      type: object
+      properties:
+        timestamp:
+          type: integer
+          description: Timestamp of the log entry.
+          example: 1719135780
+        duration:
+          type: integer
+          description: Duration of the charging session in milliseconds.
+          example: 22358
+        energy:
+          type: integer
+          description: Energy consumed in watt-hours.
+          example: 0
+        user:
+          type: integer
+          description: User ID or identifier.
+          example: 0
+        box:
+          type: integer
+          description: Box identifier.
+          example: 0
+
+    ChargeLogResponse:
+      type: object
+      properties:
+        line:
+          type: array
+          items:
+            $ref: '#/components/schemas/ChargeLogEntry'