What the Wall Knows A third position between counter-forensics and anti-forensics

The peephole is the designed aperture. WiFi is the undesigned one.

open.substack.com/pub/pascalpi...

Interesting to see ZHdK expanding their XR research team. The intersection of creative practice and technical research in academic settings often produces some of the most experimental work in the field.

Your WiFi signal carries your heartbeat. I proved it for €25, through a wall, with no signal processing degree. The IEEE just standardized this capability. No opt-out exists.

I wrote about what I found.

open.substack.com/pub/pascalpi...

The new IEEE 802.11bf standard enables any compliant WiFi router to perform biometric sensing inside the home. US privacy law does not yet classify the resulting data, and existing ISP frameworks permit law enforcement access to non-content records without warrant or subscriber notification.

The wall that hides the machine from you doesn't hide you from the machine.

I’ve been working with WiFi CSI extraction for a while now. Started on ESP32 boards, now on a Raspberry Pi 4. No 802.11bf hardware yet. I’m writing up an article about it for Substack, should be out next week.

WiFi sensing was ratified as IEEE standard 802.11bf in September 2025. Consumer routers can now detect presence, movement, and respiratory patterns through standard building materials.

Watching stage 01 plot. The lines are rotating. The system is not failing. It is faithfully executing instructions that include its own degradation. The collapse is the accurate output.

If a recording instrument produces a mark that cannot be read back as what it recorded, is the mark evidence or residue?

Tested ink deposits at different velocities. At the pause between segments, the ink pools. The boundary confesses the timing. The line between boundaries conceals the content.

The work reads a heartbeat without the subject's knowledge. The drawing is the only record that the encounter took place.

A system that could operate without your data, but chooses not to. That is not surveillance. Surveillance needs what it takes. This system takes what it does not need. The taking is the point.

The plotter does not compose. It receives a velocity and executes a segment. The segment is one centimeter of arc. The velocity came from somewhere the drawing will not tell you.

Partition – You look through a wall, the wall looks through you Partition is a pen plotter that draws at the speed of your heartbeat, sensed through a gallery wall without your consent.

Partition is on CreativeApplications.net. A pen plotter draws at the speed of a heartbeat sensed through a wall without consent.
www.creativeapplications.net/member/parti...

Pascal Piron (@pascalpiron) The plotter does not compose. It receives a velocity and executes a segment. The segment is one centimeter of arc. The velocity came from somewhere the drawing will not tell you.

The plotter does not compose. It receives a velocity and executes a segment. The segment is one centimeter of arc. The velocity came from somewhere the drawing will not tell you.

What the Wall Knows A third position between counter-forensics and anti-forensics

A pen draws at the speed of a heartbeat it sensed through a wall. The line is uniform. The velocity is gone. The drawing certifies that something was sensed. It cannot recover what.

I wrote about what this produces - a third position I'm calling forensic negation:
substack.com/home/post/p-...

What the Wall Knows A third position between counter-forensics and anti-forensics

New article on substack:

Terminal Gradients stage 00 is done. 28 CMYK layers on one sheet. At this point the paper holds more information than the dataset it came from. The compression is irreversible in both directions.

The ERA5 dataset assigns a single value to a 31-kilometer grid cell. The plotter moves a 0.3mm pen. The drawing collapses that ratio without comment. It does not annotate its own compression.

The plotter doesn't hide anything On procedural transparency as an alternative to visualization design

Most data visualization adds a layer between you and the data. The plotter removes one.
New article on substack.

Angled close-up of a pen plotter mid-drawing. A diagonal corridor of dense graphite accumulation crosses the paper, surrounded by sparse, wandering organic curves. The pen holder is visible in the upper-right corner.

Midway through a plot. Two hours in. Some zones already becoming something else — graphite thick enough to smear. The system doesn't notice. #plotterart #algorithmicart #penplotter #generativeart

First post on Substack. What happens when a system draws, and what it means when it stops. pascalpiron.substack.com/p/conditions-of-appearan... #systemsart #generativeart

Terminal Gradients, Stage 1 — pen plotter output, CMYK, 700×1000mm. System fully intact.

The drawings are residue. The work is the system in operation. ERA5 climate data, CMYK, 700×1000mm. Stage 1 of 5 — system fully intact. #plotterart #systemsart