The SD card moves over as is, so:
- pi_standard_setup can install the Pi 5 kernel (linux-image-rpi-2712, an arm64
package on the armhf userland), which a Pi 4 image lacks. Opt-in via
pi_standard_setup_install_pi5_kernel.
- The Pi is powered through the HiFiBerry board's GPIO header, so it cannot negotiate
a 5A supply and would cap USB at 600mA. pi_hifiberry_amp sets
usb_max_current_enable=1 when hifiberry_powers_pi is true (default false).
- The DHT22 poller is off: Adafruit_DHT bit-bangs BCM283x registers, which the Pi 5
no longer has (GPIO sits behind the RP1 chip).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
