Fix improv_serial initialization failure after "Prepare for First Use"#888
Merged
balloob merged 1 commit intoesphome:mainfrom Mar 30, 2026
Merged
Fix improv_serial initialization failure after "Prepare for First Use"#888balloob merged 1 commit intoesphome:mainfrom
balloob merged 1 commit intoesphome:mainfrom
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Problem
After completing "Prepare for First Use" (device flashing), the improv_serial component fails to initialize because the UART buffer contains residual data from the flashing process and device boot sequence. This causes improv_serial to fail parsing the initial handshake.
Solution
Add a device reset (RTS pulse) at the end of the installation process, before handing control to improv_serial. This clears the serial buffer and allows improv_serial to start with a clean state.
Changes
The reset uses the same RTS pulse mechanism as the existing "Reset Device" button in the logs view.
Testing
Load website with HTTPS
Use "Prepare for First Use" to flash a device
Proceed to "Configure Wi-Fi"
improv_serial should now successfully initialize and allow Wi-Fi configuration