Layout, from on-device feedback: the magnetometer/heading-source line moved
from the stats column to a centred line over the dial; the stats panel now
starts at the top of the column, and the rows that freed up went to the
target -- name, range + bearing, how far to turn ("56 deg right", "ahead")
and when the contact was last heard. The key hint is centred along the
bottom edge of the view and spells the actions out ("C calibrate O rotate
F flip <> target"). The heading's DIGITS are centred with the degree sign
hanging off their right edge, so the number does not appear to shift as the
reading crosses 100/200; the width estimate also counts characters rather
than bytes now, which is what put it half a glyph off (the degree sign is
two bytes in UTF-8).
Host: label:width(px) takes an optional alignment ("center"/"right") -- an
app cannot measure glyphs, so this is the only way for it to centre a line
exactly. Also excluded the app ROOT from keyboard-nav focus: excluding only
the body moved the reverse-video highlight up one level instead of removing
it, which is why the page was still white.
sideload_app.py retries fput/fend as well as fadd -- the same UART byte loss
that garbles a long line can garble a short one ("Error: unknown command").
Calibration now reports the measured field strength in its toast, which is
the number that says whether the calibration is any good (Earth: 0.25-0.65 G).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The ThinkNode M9's microSD is soldered on, so the SDK's "drop it on the card"
route does not exist there and the Store can only fetch from its own host.
Three console commands write into the same /apps (or /lang) the Store uses:
fput /apps/<name> open (truncate); names [A-Za-z0-9._-]
fadd <off> <len> <sum> <base64> append a chunk, every field verified
fend close
Same physical-access trust level as the existing "rm"/"erase", narrower scope
(two directories). DataStore gains a root-aware mkdirRooted(); the CLI line
buffer grows from 80 to 200 bytes.
Why the chunks are self-checking and short: the UART interrupt is not
IRAM-resident, so while the loop is inside a flash-cache pause only the
128-byte hardware FIFO buffers console input and the middle of a longer line
is lost -- observed on the M9 as a 197-char line echoed back as 120. Offset,
decoded length and byte sum reject a damaged line; the host re-sends. The
host script also waits for "[BOOT] ui ready" because the CH34x bridge resets
the board whenever the port is opened and the console is not serviced before
the UI is up.
Verified on the M9: gpscompass.lua (19055 B) + .json pushed, sizes confirmed
by the device and by `ls /apps` after a reboot. M9 and V4-R8 envs compile.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Michael A. Cojocari