# Homeyduino don't compile with Arduino UNO R4 Wifi

**URL:** <https://community.homey.app/t/homeyduino-dont-compile-with-arduino-uno-r4-wifi/88066>\
**Category:** Developers\
**Created:** [August 26, 2023, 6:23pm UTC](https://community.homey.app/t/homeyduino-dont-compile-with-arduino-uno-r4-wifi/88066 "2023-08-26T18:23:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Per-Jarle\_Saether](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/per-jarle_saether/32/78879_2.png) [@Per-Jarle\_Saether](https://community.homey.app/u/Per-Jarle_Saether)\
**Post date:** [August 26, 2023, 6:23pm UTC](https://community.homey.app/t/homeyduino-dont-compile-with-arduino-uno-r4-wifi/88066/1 "2023-08-26T18:23:13Z")

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Hello  
I just got my hands on an Arduino UNO R4 Wifi, and was hoping to test out the Homeyduino library with it.

But the Homey.cpp uses strnlen functions which aren’t available on this Arduino

Anyone has a solution for this?

Best regards  
PJ

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**Author:** ![Baldhor](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/baldhor/32/27028_2.png) [@Baldhor](https://community.homey.app/u/Baldhor)\
**Post date:** [August 26, 2023, 10:48pm UTC](https://community.homey.app/t/homeyduino-dont-compile-with-arduino-uno-r4-wifi/88066/2 "2023-08-26T22:48:07Z")

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I don’t know anything about Arduino, but this toy use an ESP32s3, and so ESPhome can be installed on it.  
Then you can use [ESPhome Appli pour Homey | Homey](https://homey.app/fr-fr/app/nl.inversion.esphome/ESPhome)