To learn how to reset your RainMachine device Wi-Fi settings please follow this support article steps related to your RainMachine device version.

https://support.rainmachine.com/hc/en-us/articles/21342143486743-How-to-connect-RainMachine-to-Wi-Fi

If you encounter any issues during the setup process, consult this page to learn how to reset the RainMachine devices. Additionally, you may need to ensure that your Wi-Fi network is functioning properly and that you have the correct credentials entered.