diff --git a/src/data/zwave_js.ts b/src/data/zwave_js.ts
index 8cc704db2abb..dc4b835d3815 100644
--- a/src/data/zwave_js.ts
+++ b/src/data/zwave_js.ts
@@ -275,6 +275,15 @@ export interface ZWaveJSSetConfigParamData {
   value: string | number;
 }
 
+export interface ZWaveJSSetRawConfigParamData {
+  type: string;
+  device_id: string;
+  property: number;
+  value: number;
+  value_size: number;
+  value_format: number;
+}
+
 export interface ZWaveJSSetConfigParamResult {
   value_id?: string;
   status?: string;
@@ -677,6 +686,36 @@ export const setZwaveNodeConfigParameter = (
   return hass.callWS(data);
 };
 
+export const setZwaveNodeRawConfigParameter = (
+  hass: HomeAssistant,
+  device_id: string,
+  property: number,
+  value: number,
+  value_size: number,
+  value_format: number
+): Promise<ZWaveJSSetConfigParamResult> => {
+  const data: ZWaveJSSetRawConfigParamData = {
+    type: "zwave_js/set_raw_config_parameter",
+    device_id,
+    property,
+    value,
+    value_size,
+    value_format,
+  };
+  return hass.callWS(data);
+};
+
+export const getZwaveNodeRawConfigParameter = (
+  hass: HomeAssistant,
+  device_id: string,
+  property: number
+): Promise<number> =>
+  hass.callWS({
+    type: "zwave_js/get_raw_config_parameter",
+    device_id,
+    property,
+  });
+
 export const reinterviewZwaveNode = (
   hass: HomeAssistant,
   device_id: string,
diff --git a/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-custom-param.ts b/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-custom-param.ts
new file mode 100644
index 000000000000..2bfba45a42e6
--- /dev/null
+++ b/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-custom-param.ts
@@ -0,0 +1,254 @@
+import { LitElement, html, css, type CSSResultGroup, nothing } from "lit";
+import { customElement, property, state } from "lit/decorators";
+import { mdiCloseCircle } from "@mdi/js";
+import "../../../../../components/ha-textfield";
+import "../../../../../components/ha-select";
+import "../../../../../components/ha-button";
+import "../../../../../components/ha-circular-progress";
+import "../../../../../components/ha-list-item";
+import type { HomeAssistant } from "../../../../../types";
+import {
+  getZwaveNodeRawConfigParameter,
+  setZwaveNodeRawConfigParameter,
+} from "../../../../../data/zwave_js";
+
+@customElement("zwave_js-custom-param")
+class ZWaveJSCustomParam extends LitElement {
+  @property({ attribute: false }) public hass!: HomeAssistant;
+
+  @property() public deviceId!: string;
+
+  @state() private _customParamNumber?: number;
+
+  @state() private _valueSize = 1;
+
+  @state() private _value?: number;
+
+  @state() private _valueFormat = 0;
+
+  @state() private _isLoading = false;
+
+  @state() private _error = "";
+
+  protected render() {
+    return html`
+      <div class="custom-config-form">
+        <ha-textfield
+          .label=${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.parameter"
+          )}
+          .value=${this._customParamNumber ?? ""}
+          @input=${this._customParamNumberChanged}
+          type="number"
+        ></ha-textfield>
+        <ha-select
+          .label=${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.size"
+          )}
+          .value=${String(this._valueSize)}
+          @selected=${this._customValueSizeChanged}
+        >
+          <ha-list-item value="1">1</ha-list-item>
+          <ha-list-item value="2">2</ha-list-item>
+          <ha-list-item value="4">4</ha-list-item>
+        </ha-select>
+        <ha-textfield
+          .label=${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.value"
+          )}
+          .value=${this._value ?? ""}
+          @input=${this._customValueChanged}
+          type="number"
+        ></ha-textfield>
+        <ha-select
+          .label=${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.format"
+          )}
+          .value=${String(this._valueFormat)}
+          @selected=${this._customValueFormatChanged}
+        >
+          <ha-list-item value="0"
+            >${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.signed"
+            )}</ha-list-item
+          >
+          <ha-list-item value="1"
+            >${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.unsigned"
+            )}</ha-list-item
+          >
+          <ha-list-item value="2"
+            >${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.enumerated"
+            )}</ha-list-item
+          >
+          <ha-list-item value="3"
+            >${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.bitfield"
+            )}</ha-list-item
+          >
+        </ha-select>
+      </div>
+      <div class="custom-config-buttons">
+        ${this._isLoading
+          ? html`<ha-circular-progress indeterminate></ha-circular-progress>`
+          : nothing}
+        <ha-button @click=${this._getCustomConfigValue}>
+          ${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.get_value"
+          )}
+        </ha-button>
+        <ha-button @click=${this._setCustomConfigValue}>
+          ${this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.set_value"
+          )}
+        </ha-button>
+      </div>
+      <div class="error">
+        ${this._error
+          ? html`<ha-svg-icon
+                .path=${mdiCloseCircle}
+                class="error-icon"
+                slot="item-icon"
+              ></ha-svg-icon
+              ><em>${this._error}</em>`
+          : nothing}
+      </div>
+    `;
+  }
+
+  private _customParamNumberChanged(ev: Event) {
+    this._customParamNumber =
+      Number((ev.target as HTMLInputElement).value) || undefined;
+  }
+
+  private _customValueSizeChanged(ev: Event) {
+    this._valueSize = Number((ev.target as HTMLSelectElement).value) || 1;
+  }
+
+  private _customValueChanged(ev: Event) {
+    this._value = Number((ev.target as HTMLInputElement).value) || undefined;
+  }
+
+  private _customValueFormatChanged(ev: Event) {
+    this._valueFormat = Number((ev.target as HTMLSelectElement).value) || 0;
+  }
+
+  private async _getCustomConfigValue() {
+    if (this._customParamNumber === undefined) {
+      this._error = this.hass.localize(
+        "ui.panel.config.zwave_js.node_config.error_required",
+        {
+          entity: this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.parameter"
+          ),
+        }
+      );
+      return;
+    }
+    this._error = "";
+    this._isLoading = true;
+    try {
+      const value = await getZwaveNodeRawConfigParameter(
+        this.hass,
+        this.deviceId,
+        this._customParamNumber
+      );
+      this._value = value;
+    } catch (err: any) {
+      this._error = err?.message || "Unknown error";
+    } finally {
+      this._isLoading = false;
+    }
+  }
+
+  private async _setCustomConfigValue() {
+    if (this._customParamNumber === undefined) {
+      this._error = this.hass.localize(
+        "ui.panel.config.zwave_js.node_config.error_required",
+        {
+          entity: this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.parameter"
+          ),
+        }
+      );
+      return;
+    }
+    if (this._value === undefined) {
+      this._error = this.hass.localize(
+        "ui.panel.config.zwave_js.node_config.error_required",
+        {
+          entity: this.hass.localize(
+            "ui.panel.config.zwave_js.node_config.value"
+          ),
+        }
+      );
+      return;
+    }
+    this._error = "";
+    this._isLoading = true;
+    try {
+      await setZwaveNodeRawConfigParameter(
+        this.hass,
+        this.deviceId,
+        this._customParamNumber,
+        this._value,
+        this._valueSize,
+        this._valueFormat
+      );
+    } catch (err: any) {
+      this._error = err?.message || "Unknown error";
+    } finally {
+      this._isLoading = false;
+    }
+  }
+
+  static get styles(): CSSResultGroup {
+    return css`
+      .custom-config-form {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 16px;
+        margin-bottom: 8px;
+      }
+
+      ha-textfield,
+      ha-select {
+        flex-grow: 1;
+        flex-basis: calc(50% - 8px);
+        min-width: 120px;
+      }
+
+      @media (min-width: 681px) {
+        .custom-config-form {
+          flex-wrap: nowrap;
+        }
+
+        ha-textfield,
+        ha-select {
+          flex-basis: 0;
+        }
+      }
+
+      .custom-config-buttons {
+        display: flex;
+        justify-content: flex-end;
+        align-items: center;
+      }
+
+      .error {
+        color: var(--error-color);
+      }
+
+      .error-icon {
+        margin-right: 8px;
+      }
+    `;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "zwave_js-custom-param": ZWaveJSCustomParam;
+  }
+}
diff --git a/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-node-config.ts b/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-node-config.ts
index 7f3336854c4f..6ae6654b4181 100644
--- a/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-node-config.ts
+++ b/src/panels/config/integrations/integration-panels/zwave_js/zwave_js-node-config.ts
@@ -40,6 +40,7 @@ import { haStyle } from "../../../../../resources/styles";
 import type { HomeAssistant, Route } from "../../../../../types";
 import "../../../ha-config-section";
 import { configTabs } from "./zwave_js-config-router";
+import "./zwave_js-custom-param";
 import { showConfirmationDialog } from "../../../../../dialogs/generic/show-dialog-box";
 import { fireEvent } from "../../../../../common/dom/fire_event";
 
@@ -193,6 +194,22 @@ class ZWaveJSNodeConfig extends LitElement {
               )}
             </ha-progress-button>
           </div>
+          <h3>
+            ${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.custom_config"
+            )}
+          </h3>
+          <span class="secondary">
+            ${this.hass.localize(
+              "ui.panel.config.zwave_js.node_config.custom_config_description"
+            )}
+          </span>
+          <ha-card class="custom-config">
+            <zwave_js-custom-param
+              .hass=${this.hass}
+              .deviceId=${this.deviceId}
+            ></zwave_js-custom-param>
+          </ha-card>
         </ha-config-section>
       </hass-tabs-subpage>
     `;
@@ -600,6 +617,10 @@ class ZWaveJSNodeConfig extends LitElement {
           text-align: right;
         }
 
+        .custom-config {
+          padding: 16px;
+        }
+
         .reset {
           display: flex;
           justify-content: flex-end;
diff --git a/src/translations/en.json b/src/translations/en.json
index b72a7a54d118..be57c6213908 100644
--- a/src/translations/en.json
+++ b/src/translations/en.json
@@ -4959,12 +4959,24 @@
             "parameter_is_read_only": "This parameter is read-only.",
             "between_min_max": "Between {min} and {max}",
             "error_not_in_range": "Value must be between {min} and {max}",
+            "error_required": "{entity} is required",
             "error_device_not_found": "Device not found",
             "set_param_accepted": "The parameter has been updated.",
             "set_param_queued": "The parameter change has been queued, and will be updated when the device wakes up.",
             "set_param_error": "An error occurred.",
             "parameter": "Parameter",
             "bitmask": "Bitmask",
+            "size": "Size",
+            "value": "Value",
+            "format": "Format",
+            "custom_config": "Custom configuration",
+            "custom_config_description": "You can use this section to get/set custom configuration parameters for your device. This is useful when working with devices that are not fully supported.",
+            "get_value": "Get value",
+            "set_value": "Set value",
+            "signed": "Signed",
+            "unsigned": "Unsigned",
+            "enumerated": "Enumerated",
+            "bitfield": "Bitfield",
             "reset_to_default": {
               "button_label": "Reset to default configuration",
               "dialog": {