ESPFlash Closed Beta Testing

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Sep 5, 2025, 7:45:01 AM (4 days ago) Sep 5
to serialflow

Hello everyone,

Thank you for joining the closed testing program of ESPFlash – an Android tool for flashing ESP32 firmware directly from your phone.

About ESPFlash
ESPFlash allows you to flash firmware onto a wide range of ESP32 chips without the need for a PC. It supports both native USB ESP32 variants (ESP32-C3, S3, S2, C5, C6, P4, H2) as well as traditional boards through USB-to-UART adapters.
Key features include:

  • Fast and reliable flashing

  • Stub loader and firmware compression support

  • USB OTG connection (native USB and USB-to-Serial bridges)

  • Broad compatibility with nearly all ESP-based chips

Download & Install
You can join the closed beta and download the app here:
👉  https://play.google.com/apps/testing/io.serialflow.espflash

Feedback & Issues
Since this is a beta version, bugs and limitations may exist. Please share your feedback, suggestions, and bug reports in this group. Your input will help us improve ESPFlash before the public release.

Thank you for testing and supporting ESPFlash!

— The ESPFlash Developer

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