# Arduino ESP32 aRest **URL:** \ **Category:** Questions about Thunkable X\ **Created:** [February 17, 2020, 9:22am UTC](https://community.thunkable.com/t/arduino-esp32-arest/469143 "2020-02-17T09:22:39Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![auspsx1968hu](https://avatars.discourse-cdn.com/v4/letter/a/a88e4f/32.png) [@auspsx1968hu](https://community.thunkable.com/u/auspsx1968hu)\ **Post date:** [February 17, 2020, 9:22am UTC](https://community.thunkable.com/t/arduino-esp32-arest/469143/1 "2020-02-17T09:22:39Z")
Hi, I am building an Arduino Home Automation System. I have completed my design using an ESP32 running the aRest API. I can send the appropiate html strings from the web browser and all works fine, the relay turns off/on without a problem, however I cannot work out how to send the required html string from within the cross platform App to the ESP32. [http://xxx.xxx.xxx.xxx/digital/xx/1](http://xxx.xxx.xxx.xxx/digital/xx/1). Any assistance would be much appreciated. ---
**Author:** ![domhnallohanlon](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/domhnallohanlon/32/29554_2.png) [@domhnallohanlon](https://community.thunkable.com/u/domhnallohanlon)\ **Post date:** [February 24, 2020, 4:02pm UTC](https://community.thunkable.com/t/arduino-esp32-arest/469143/2 "2020-02-24T16:02:34Z")
Hi @auspsx1968hu 👋 This sounds like a great project - would you mind sharing a screenshot of the blocks you are using to try and do this? Also, can you clarify if you are on iOS/Android/both? Thanks! ---
**Author:** ![auspsx1968hu](https://avatars.discourse-cdn.com/v4/letter/a/a88e4f/32.png) [@auspsx1968hu](https://community.thunkable.com/u/auspsx1968hu)\ **Post date:** [February 27, 2020, 10:53am UTC](https://community.thunkable.com/t/arduino-esp32-arest/469143/3 "2020-02-27T10:53:36Z")
Hi domhnallohanlon, thanks for replying. I have already written the App in MIT App Inventer for Android and it works fine. I would like the app to be cross platform hense thunkable. I have attached a screen shot of the blocks I have been using without success. Any help would be much appreciated. Thanks heaps ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/b/0/b0a1a03213ec9cb59982dd64917dab07c20d8a0f.png) ---
**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\ **Post date:** [November 8, 2024, 11:40am UTC](https://community.thunkable.com/t/arduino-esp32-arest/469143/4 "2024-11-08T11:40:47Z")