A small sealed probe with a breathable membrane, a humidity and temperature sensor and a sub-GHz radio. Cast it into concrete or build it into a timber wall, then read what is happening inside for years. Everything is open, and the data is shaped for AI agents to use directly.
Not a commercial product. An open reference design and a working demo, by the ssense project.
Temperature inside the pour gives maturity, and maturity gives a strength estimate once the mix is calibrated. Know when forms can come off and whether a cold night slowed things down.
Humidity behind the membrane shows the drying trend at depth over the following weeks.
The probe logs on its own through delivery, erection and enclosure, with no gateway needed on the truck. Each element or wall carries its own record of humidity, temperature and wood moisture.
After handover the same probe keeps watching for leaks and mould risk.
Grain, hay bales, compost, soil, drying lumber. The design is meant to be forked. If you have a material and a question, tell us in the form below.
A tube with an ePTFE membrane over the opening keeps liquid out and lets vapour in. Inside: sensor, microcontroller, radio, battery and a log memory, so nothing is lost when no gateway is in range.
Collects readings over sub-GHz radio and publishes them over MQTT in a documented schema. Each probe carries its location, depth, material and install time as metadata.
An MCP server exposes the data and the models (maturity, strength estimate, mould index) as tools. Ask a question in plain language and get an answer grounded in the readings.
Most monitoring systems stop at a chart and an alarm threshold. Here the data, the metadata and the models are open, so an agent can combine them with a weather forecast or a site schedule and answer the question you actually have.
Which wall element stayed above 85 % RH the longest, and when?
list_sensors(material="timber")
get_history(sensor="W-14", metric="rh")
Element W-14, bottom plate. It was above 85 % RH for most of the period between delivery and roof closure. Mould index stayed below the risk level. Suggest checking that spot before the wall is closed.
Status: design phase, first demo build in preparation (November 2026). The repository and the licenses are published with the first demo.
If you build, manufacture elements, do research or just want to try this, leave your details. One email when the demo and the repository are ready, nothing else.