Expand description
Board support for the LilyGO T-Echo (nRF52840).
Composes umsh-bsp-nrf52840 with
the T-Echo’s pinout and on-board peripherals.
Initial scope is bringup only:
- peripheral power switch (P0.12, active-high)
- USB-CDC handles (over the nRF native USB peripheral)
- blue LED (P0.14, active-low)
- e-paper SPI bus + control pins for the SSD1681 display
- battery voltage / charge state (SAADC on AIN2/P0.04)
- GNSS power sequencing for the Quectel L76K
Future expansion (LoRa, I²C peripherals, QSPI flash, buttons,
Plus-only back-panel) is welcome but is not yet implemented. The
T-Echo is not a tracker-class device — when a “real” T-Echo firmware
arrives, it should be designed against a new umsh-ux-handheld (or
similar) class rather than umsh-ux-tracker.
See docs/hardware/lilygo-techo-hardware.md for the firmware-derived
hardware reference.