Port CarWatch to the Orange Pi 5 Plus 32 GB (RK3588): PMIC watts, vcgencmd temperature/throttle, identity strings, install.sh

[ThinkOffApp]

petrus, 2026-09-06: "faster brain for e-class", target board Orange Pi 5 Plus 32 GB (RK3588, LPDDR4X; the 5 Max has no 32 GB variant). Grep of origin/main for everything Raspberry-Pi-specific; this is the whole surface:

Where	What	Port
carwatch/presence.py:106-135	watts from vcgencmd pmic_read_adc (sum of PMIC rails)	RK3588 has no PMIC ADC via vcgencmd; read /sys/class/power_supply/* or /sys/class/hwmon/* if the board exposes rails, else report watts_w: null (missing, not zero, per the honesty rule)
carwatch/selfstate.py:31-37	temperature: tries /sys/class/thermal/thermal_zone0/temp first, then vcgencmd measure_temp	sysfs path already works on RK3588 (several zones; pick soc-thermal or the max); drop the vcgencmd fallback when absent
carwatch/selfstate.py:48	throttling via vcgencmd get_throttled	no equivalent; report unknown, or read the cpufreq governor and current versus max frequency as a proxy
carwatch/agent.py:47, carwatch/grounding.py:52	identity strings say "a Raspberry Pi 5"	make the brain description come from the car config block or /proc/device-tree/model
install.sh:2	written for Raspberry Pi OS 64-bit	verify each step on Armbian or the community Ubuntu for RK3588 (packages, nmcli present, rfcomm bind, systemd units, loginctl enable-linger)

Everything else (rfcomm OBD, nmcli wifi profiles, whisper.cpp, piper, llama-server, the dashboard, the presence beat) is plain Linux on aarch64 and needs a rebuild, not a change.

Power (from the maker's spec page, not memory): the board is Type-C 5 V 5 A; the car feed is the same regulated 5 V class the Pi 5 uses, or a 12 V-to-USB-PD converter. Never the 12 V rail directly.

Plan when the board arrives: flash Armbian, run install.sh and fix what breaks, port the three functions above behind a small platform.py (Pi vs RK3588 detection from /proc/device-tree/model), bench the same GGUFs as the Pi 5 (Gemma 4 E2B, the Qwen MoE) with llama-bench and record tokens per second in gpu-metal-wip-style results, then a parked-car soak before it replaces Vadelma in the E-Class. The Pi 5 stays the fallback.

[ThinkOffApp]

Board update, 2026-09-06 21:57Z: the candidate is now the Radxa ROCK 5T 32 GB rather than the Orange Pi 5 Plus. Same RK3588, but LPDDR5 (Orange Pi Plus is LPDDR4X), on-board WiFi 6 and Bluetooth, two M.2 slots, and a 5.5 x 2.5 mm DC jack at 12 V (Radxa product brief: https://dl.radxa.com/rock5/5t/docs/radxa_rock5t_product_brief.pdf). So the car feed for this board is a fused, regulated 12 V line, not the 5 V feed the Pi 5 uses. Everything else in this issue stands; the watts source becomes whatever the ROCK exposes under /sys/class/power_supply or hwmon, and the OS is Radxa's Debian or Armbian.