How an artist built a device that reads plant signals

On a fifth-floor balcony in Melbourne, a basil plant shares the morning with commuter coffee, a watering can and a bag of recycled-paper mulch. That familiar scene is a starting point for an unusual experiment: a device that turns faint bioelectric changes in a living plant into something people can see and hear.

The artist in this ITP 30 Show project does not claim the plant is transmitting secret messages. The work builds an instrument from a relationship among organism, sensor and audience. Tiny changes become patterns, and the artist turns those patterns into sound, movement or light. The invitation is to notice how technology mediates something usually treated as background.

From leaves to electrical signals

Calling it a device that reads plant signals is evocative, but the mechanism is deliberately modest. Plants generate electrical and chemical activity, and their condition, water stress, light and touch can alter it. The artist uses those shifts as source material rather than as a fixed code with one meaning.

The build starts with small sensors that register electrical or capacitive changes around a leaf or in the soil. A microcontroller amplifies and filters the readings, removing enough background interference to establish a baseline. Software then converts the remaining variation into a changing output. A quiet plant does not produce one fixed note; its relationship to the baseline creates the expressive range.

Turning readings into meaning

Translation is where the artistic decisions begin. The artist chooses which measurements matter, how quickly they respond and whether a change becomes louder, brighter or more disruptive. This mapping makes the device feel less like a laboratory instrument and more like a musical interface shaped by a living collaborator.

The show’s testing-phase reflection describes the surprise of that exchange. Visitors do not simply activate a pre-recorded response; their attention and movement can alter the encounter. The device turns participation into a negotiation between human intention and plant behaviour, without claiming that either side controls the result.

What the prototype revealed

Prototypes made the fragile parts of the system visible. Sensor placement affected consistency, cables interrupted attention, and a plant needed time to settle after being handled. The artist adjusted these variables so the interface would reward close looking instead of demanding technical expertise.

The development trail is part of the work’s meaning. Readers can browse the project archive for the project description and author credits, then compare the polished encounter with the practical decisions behind it. An experimental device becomes more legible when its limitations remain visible.

The build in an Australian context

Set in Australia, the build meets familiar conditions. Apartment living in Sydney and Melbourne leaves many people with sunny balconies rather than open gardens, so herbs and vegetables often grow in pots. Garden centres and hardware stores such as Bunnings supply the materials, while morning watering is a familiar household habit shaped by heat, work schedules and conserving resources.

The climate adds another layer. During dry periods, Sydney Water and Melbourne Water can restrict garden watering, making moisture and plant stress practical concerns rather than abstract ones. Those local habits give the project a grounded setting: technology enters a balcony where every drop, leaf and daily routine already matters.

Keeping the interpretation responsible

An Australian version also needs a clear legal and ethical frame. If it records identifiable voices, video or interaction data, the Privacy Act 1988 may apply. If sold or promoted as a diagnostic tool, the Australian Consumer Law also prevents misleading claims about what its readings can establish.

The distinction between sensing and interpreting matters. Electrical variation can support an artwork, but it cannot by itself diagnose disease or prove what a plant “means.” Clear labels, informed participation and a refusal to overstate the evidence keep the project credible. Care for the organism must also outrank spectacle.

What to notice in the interaction

The encounter becomes easier to understand when attention is directed to a few visible details rather than treated as pure spectacle. The underlying mechanism and the artistic interpretation can then be understood as separate layers.

Inside the build

• Electrodes sample small changes without uncovering a secret language.
• A microcontroller filters noise and establishes a changing baseline.
• Software maps each variation into sound, light or movement.

The same structure can be observed from the visitor’s side, where physical gestures and changes in the plant share the same field of attention.

During the encounter

• A settled plant produces a steadier baseline than a recently handled one.
• Small gestures may register before the full output visibly changes.
• The gap between raw activity and artistic mapping remains open to interpretation.

Watching these layers separately prevents the spectacle from hiding its mechanism, while listening for their differences keeps the plant present as an active participant.

Meet the project and take part

The broader ITP 30 Show brings this experiment into a larger online showcase of interactive art, design, technology and media. The project page guides visitors through the concept and credits; event information and RSVP details sit alongside the wider show resources when an online or in-person gathering is offered.

Visit the showcase, open the plant project, and give the device the time it asks for. Read the notes, join the event if one is listed, then revisit the archive with a plant nearby. Look closely, stay curious, and let the living collaborator remain more than an effect.