Run the LilyGo T-Echo on Adafruit UF2 bootloader 0.11.0 with Nordic SoftDevice S140 7.3.0, instead of the factory 0.6.1 / S140 6.1.1. Board port, CI-verified release builds, flashing and recovery guide.
embedded firmware ble bootloader dfu uf2 nrf52840 softdevice nordic-semiconductor t-echo lilygo-t-echo
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Updated
Jul 15, 2026 - C