A unit's touch never answered: "touchscreen is marked FAILED: Calibration error" at setup, the GT911 still in reset
behind the PCA9557 (I2C 0x18) of the V3.0 board. The board file declares the expander as ESPHome's pca9554 (the same
register map) and hands the GT911 driver its reset (IO0) and interrupt (IO1) pins on it, so the driver runs Elecrow's
own sequence: reset low with the interrupt line low, reset high, 56 ms, address 0x5D. A V2.0 without the expander boots
its GT911 by the pull-up as before. The bus is scanned at boot for the log.
Xandrossian
da28d19961