diff --git a/arduino-ide-extension/src/browser/arduino-preferences.ts b/arduino-ide-extension/src/browser/arduino-preferences.ts
index 42e6cedf..919cd8e5 100644
--- a/arduino-ide-extension/src/browser/arduino-preferences.ts
+++ b/arduino-ide-extension/src/browser/arduino-preferences.ts
@@ -1,11 +1,6 @@
 import { interfaces } from 'inversify';
-import {
-    createPreferenceProxy,
-    PreferenceProxy,
-    PreferenceService,
-    PreferenceContribution,
-    PreferenceSchema
-} from '@theia/core/lib/browser/preferences';
+import { createPreferenceProxy, PreferenceProxy, PreferenceService, PreferenceContribution, PreferenceSchema } from '@theia/core/lib/browser/preferences';
+import { CompilerWarningLiterals, CompilerWarnings } from '../common/protocol';
 
 export const ArduinoConfigSchema: PreferenceSchema = {
     'type': 'object',
@@ -20,6 +15,11 @@ export const ArduinoConfigSchema: PreferenceSchema = {
             'description': 'True for verbose compile output. False by default',
             'default': false
         },
+        'arduino.compile.warnings': {
+            'enum': [...CompilerWarningLiterals],
+            'description': "Tells gcc which warning level to use. It's 'None' by default",
+            'default': 'None'
+        },
         'arduino.upload.verbose': {
             'type': 'boolean',
             'description': 'True for verbose upload output. False by default.',
@@ -50,6 +50,7 @@ export const ArduinoConfigSchema: PreferenceSchema = {
 export interface ArduinoConfiguration {
     'arduino.language.log': boolean;
     'arduino.compile.verbose': boolean;
+    'arduino.compile.warnings': CompilerWarnings;
     'arduino.upload.verbose': boolean;
     'arduino.upload.verify': boolean;
     'arduino.window.autoScale': boolean;
diff --git a/arduino-ide-extension/src/browser/contributions/verify-sketch.ts b/arduino-ide-extension/src/browser/contributions/verify-sketch.ts
index d01869fa..7522d594 100644
--- a/arduino-ide-extension/src/browser/contributions/verify-sketch.ts
+++ b/arduino-ide-extension/src/browser/contributions/verify-sketch.ts
@@ -80,6 +80,7 @@ export class VerifySketch extends SketchContribution {
                 this.sourceOverride()
             ]);
             const verbose = this.preferences.get('arduino.compile.verbose');
+            const compilerWarnings = this.preferences.get('arduino.compile.warnings');
             this.outputChannelManager.getChannel('Arduino').clear();
             await this.coreService.compile({
                 sketchUri: sketch.uri,
@@ -87,7 +88,8 @@ export class VerifySketch extends SketchContribution {
                 optimizeForDebug: this.editorMode.compileForDebug,
                 verbose,
                 exportBinaries,
-                sourceOverride
+                sourceOverride,
+                compilerWarnings
             });
             this.messageService.info('Done compiling.', { timeout: 1000 });
         } catch (e) {
diff --git a/arduino-ide-extension/src/browser/settings.tsx b/arduino-ide-extension/src/browser/settings.tsx
index b856ea93..65086840 100644
--- a/arduino-ide-extension/src/browser/settings.tsx
+++ b/arduino-ide-extension/src/browser/settings.tsx
@@ -18,7 +18,7 @@ import { DisposableCollection } from '@theia/core/lib/common/disposable';
 import { FrontendApplicationStateService } from '@theia/core/lib/browser/frontend-application-state';
 import { AbstractDialog, DialogProps, PreferenceService, PreferenceScope, DialogError, ReactWidget } from '@theia/core/lib/browser';
 import { Index } from '../common/types';
-import { ConfigService, FileSystemExt, Network, ProxySettings } from '../common/protocol';
+import { CompilerWarnings, CompilerWarningLiterals, ConfigService, FileSystemExt, Network, ProxySettings } from '../common/protocol';
 
 export interface Settings extends Index {
     editorFontSize: number; // `editor.fontSize`
@@ -29,6 +29,7 @@ export interface Settings extends Index {
     interfaceScale: number; // `arduino.window.zoomLevel` https://github.com/eclipse-theia/theia/issues/8751
     checkForUpdates?: boolean; // `arduino.ide.autoUpdate`
     verboseOnCompile: boolean; // `arduino.compile.verbose`
+    compilerWarnings: CompilerWarnings; // `arduino.compile.warnings`
     verboseOnUpload: boolean; // `arduino.upload.verbose`
     verifyAfterUpload: boolean; // `arduino.upload.verify`
     enableLsLogs: boolean; // `arduino.language.log`
@@ -87,6 +88,7 @@ export class SettingsService {
             interfaceScale,
             // checkForUpdates,
             verboseOnCompile,
+            compilerWarnings,
             verboseOnUpload,
             verifyAfterUpload,
             enableLsLogs,
@@ -99,6 +101,7 @@ export class SettingsService {
             this.preferenceService.get<number>('arduino.window.zoomLevel', 0),
             // this.preferenceService.get<string>('arduino.ide.autoUpdate', true),
             this.preferenceService.get<boolean>('arduino.compile.verbose', true),
+            this.preferenceService.get<any>('arduino.compile.warnings', 'None'),
             this.preferenceService.get<boolean>('arduino.upload.verbose', true),
             this.preferenceService.get<boolean>('arduino.upload.verify', true),
             this.preferenceService.get<boolean>('arduino.language.log', true),
@@ -114,6 +117,7 @@ export class SettingsService {
             interfaceScale,
             // checkForUpdates,
             verboseOnCompile,
+            compilerWarnings,
             verboseOnUpload,
             verifyAfterUpload,
             enableLsLogs,
@@ -175,6 +179,7 @@ export class SettingsService {
             interfaceScale,
             // checkForUpdates,
             verboseOnCompile,
+            compilerWarnings,
             verboseOnUpload,
             verifyAfterUpload,
             enableLsLogs,
@@ -198,6 +203,7 @@ export class SettingsService {
             this.preferenceService.set('arduino.window.zoomLevel', interfaceScale, PreferenceScope.User),
             // this.preferenceService.set('arduino.ide.autoUpdate', checkForUpdates, PreferenceScope.User),
             this.preferenceService.set('arduino.compile.verbose', verboseOnCompile, PreferenceScope.User),
+            this.preferenceService.set('arduino.compile.warnings', compilerWarnings, PreferenceScope.User),
             this.preferenceService.set('arduino.upload.verbose', verboseOnUpload, PreferenceScope.User),
             this.preferenceService.set('arduino.upload.verify', verifyAfterUpload, PreferenceScope.User),
             this.preferenceService.set('arduino.language.log', enableLsLogs, PreferenceScope.User),
@@ -267,6 +273,7 @@ export class SettingsComponent extends React.Component<SettingsComponent.Props,
                     <div className='flex-line'>Interface scale:</div>
                     <div className='flex-line'>Theme:</div>
                     <div className='flex-line'>Show verbose output during:</div>
+                    <div className='flex-line'>Compiler warnings:</div>
                 </div>
                 <div className='column'>
                     <div className='flex-line'>
@@ -321,6 +328,14 @@ export class SettingsComponent extends React.Component<SettingsComponent.Props,
                             upload
                         </label>
                     </div>
+                    <div className='flex-line'>
+                        <select
+                            className='theia-select'
+                            value={this.state.compilerWarnings}
+                            onChange={this.compilerWarningsDidChange}>
+                            {CompilerWarningLiterals.map(value => <option key={value} value={value}>{value}</option>)}
+                        </select>
+                    </div>
                 </div>
             </div>
             <label className='flex-line'>
@@ -544,6 +559,14 @@ export class SettingsComponent extends React.Component<SettingsComponent.Props,
         }
     };
 
+    protected compilerWarningsDidChange = (event: React.ChangeEvent<HTMLSelectElement>) => {
+        const { selectedIndex } = event.target.options;
+        const compilerWarnings = CompilerWarningLiterals[selectedIndex];
+        if (compilerWarnings) {
+            this.setState({ compilerWarnings });
+        }
+    };
+
     protected verboseOnCompileDidChange = (event: React.ChangeEvent<HTMLInputElement>) => {
         this.setState({ verboseOnCompile: event.target.checked });
     };
diff --git a/arduino-ide-extension/src/browser/style/settings-dialog.css b/arduino-ide-extension/src/browser/style/settings-dialog.css
index 126d089c..924a3c44 100644
--- a/arduino-ide-extension/src/browser/style/settings-dialog.css
+++ b/arduino-ide-extension/src/browser/style/settings-dialog.css
@@ -4,7 +4,7 @@
 
 .arduino-settings-dialog .content {
     padding: 5px;
-    height: 250px;
+    height: 270px;
 }
 
 .arduino-settings-dialog .flex-line {
diff --git a/arduino-ide-extension/src/common/protocol/core-service.ts b/arduino-ide-extension/src/common/protocol/core-service.ts
index 92445350..aa2b0c93 100644
--- a/arduino-ide-extension/src/common/protocol/core-service.ts
+++ b/arduino-ide-extension/src/common/protocol/core-service.ts
@@ -1,9 +1,12 @@
 import { Programmer } from './boards-service';
 
+export const CompilerWarningLiterals = ['None', 'Default', 'More', 'All'] as const;
+export type CompilerWarnings = typeof CompilerWarningLiterals[number];
+
 export const CoreServicePath = '/services/core-service';
 export const CoreService = Symbol('CoreService');
 export interface CoreService {
-    compile(options: CoreService.Compile.Options & Readonly<{ exportBinaries?: boolean }>): Promise<void>;
+    compile(options: CoreService.Compile.Options & Readonly<{ exportBinaries?: boolean, compilerWarnings?: CompilerWarnings }>): Promise<void>;
     upload(options: CoreService.Upload.Options): Promise<void>;
     uploadUsingProgrammer(options: CoreService.Upload.Options): Promise<void>;
     burnBootloader(options: CoreService.Bootloader.Options): Promise<void>;
diff --git a/arduino-ide-extension/src/node/core-service-impl.ts b/arduino-ide-extension/src/node/core-service-impl.ts
index bc80f3ff..141e58e9 100644
--- a/arduino-ide-extension/src/node/core-service-impl.ts
+++ b/arduino-ide-extension/src/node/core-service-impl.ts
@@ -2,7 +2,7 @@ import { FileUri } from '@theia/core/lib/node/file-uri';
 import { inject, injectable } from 'inversify';
 import { relative } from 'path';
 import * as jspb from 'google-protobuf';
-import { CoreService } from '../common/protocol/core-service';
+import { CompilerWarnings, CoreService } from '../common/protocol/core-service';
 import { CompileReq, CompileResp } from './cli-protocol/commands/compile_pb';
 import { CoreClientAware } from './core-client-provider';
 import { UploadReq, UploadResp, BurnBootloaderReq, BurnBootloaderResp, UploadUsingProgrammerReq, UploadUsingProgrammerResp } from './cli-protocol/commands/upload_pb';
@@ -22,31 +22,34 @@ export class CoreServiceImpl extends CoreClientAware implements CoreService {
     @inject(NotificationServiceServer)
     protected readonly notificationService: NotificationServiceServer;
 
-    async compile(options: CoreService.Compile.Options & { exportBinaries?: boolean }): Promise<void> {
-        const { sketchUri, fqbn } = options;
+    async compile(options: CoreService.Compile.Options & { exportBinaries?: boolean, compilerWarnings?: CompilerWarnings }): Promise<void> {
+        const { sketchUri, fqbn, compilerWarnings } = options;
         const sketchPath = FileUri.fsPath(sketchUri);
 
         const coreClient = await this.coreClient();
         const { client, instance } = coreClient;
 
-        const compilerReq = new CompileReq();
-        compilerReq.setInstance(instance);
-        compilerReq.setSketchpath(sketchPath);
+        const compileReq = new CompileReq();
+        compileReq.setInstance(instance);
+        compileReq.setSketchpath(sketchPath);
         if (fqbn) {
-            compilerReq.setFqbn(fqbn);
+            compileReq.setFqbn(fqbn);
         }
-        compilerReq.setOptimizefordebug(options.optimizeForDebug);
-        compilerReq.setPreprocess(false);
-        compilerReq.setVerbose(options.verbose);
-        compilerReq.setQuiet(false);
+        if (compilerWarnings) {
+            compileReq.setWarnings(compilerWarnings.toLowerCase());
+        }
+        compileReq.setOptimizefordebug(options.optimizeForDebug);
+        compileReq.setPreprocess(false);
+        compileReq.setVerbose(options.verbose);
+        compileReq.setQuiet(false);
         if (typeof options.exportBinaries === 'boolean') {
             const exportBinaries = new BoolValue();
             exportBinaries.setValue(options.exportBinaries);
-            compilerReq.setExportBinaries(exportBinaries);
+            compileReq.setExportBinaries(exportBinaries);
         }
-        this.mergeSourceOverrides(compilerReq, options);
+        this.mergeSourceOverrides(compileReq, options);
 
-        const result = client.compile(compilerReq);
+        const result = client.compile(compileReq);
         try {
             await new Promise<void>((resolve, reject) => {
                 result.on('data', (cr: CompileResp) => {