diff --git a/ui-ngx/src/app/shared/components/device/gateway-service-rpc.component.ts b/ui-ngx/src/app/shared/components/device/gateway-service-rpc.component.ts
index 461a853a56..f4a9655cc0 100644
--- a/ui-ngx/src/app/shared/components/device/gateway-service-rpc.component.ts
+++ b/ui-ngx/src/app/shared/components/device/gateway-service-rpc.component.ts
@@ -95,10 +95,10 @@ export class GatewayServiceRPCComponent extends PageComponent implements AfterVi
   sendCommand() {
     const formValues = this.commandForm.value;
     this.ctx.controlApi.sendTwoWayCommand('gateway_'+formValues.command.toLowerCase(), {},formValues.time).subscribe(resp=>{
-      this.commandForm.get('result').setValue(resp+"");
+      this.commandForm.get('result').setValue(JSON.stringify(resp));
     },error => {
       console.log(error);
-      this.commandForm.get('result').setValue(error.error+"");
+      this.commandForm.get('result').setValue(JSON.stringify(error.error));
     })
   }