SparkFun
AgXRP DIY Pump & Soil Moisture Sensor Expansion Pack - Beta
· MPN: KIT-30715
Add another controlled planting area to an existing AgXRP Starter Kit with this DIY expansion pack. It is designed to create a completely independent waterin...
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Add another controlled planting area to an existing AgXRP Starter Kit with this DIY expansion pack. It is designed to create a completely independent watering zone, so students can compare plant types, watering schedules and soil conditions side-by-side.
The pack works with the XRP Controller in the main kit, using its multiple motor drivers and daisy-chainable Qwiic connectors. Build the second pump assembly, connect the additional soil sensor, then plug it into your existing controller.
This DIY version includes the essential hardware for an extra planting zone, but does not include physical frames. Use the provided open-source 3D printing files to make your own pump enclosure, frames and mounting hardware for your setup.
The AgXRP platform is intended for hands-on STEM learning and agricultural automation projects. Documentation includes the AgXRP setup and user guide, instructional videos, frame 3D printing files and beta feedback resources.
Features:
- Automated watering: A Hobby Motor with Encoder, Deep-Groove Ball Bearings, Latex Tubing, and an AgXRP Single-Pump Enclosure Frame can be used to add an additional peristaltic pump to your 3D-printed enclosure.
- Accurate soil monitoring: Adds a second SparkFun Qwiic Soil Moisture Sensor and a 500mm Flexible Qwiic Cable for real-time hydration tracking on your additional plant.
- DIY structural support: You will 3D print the AgXRP frames, enclosures, and pump to provide a stable (and potentially custom) foundation for your electronics during long-term experiments.
- Expandable setup: Add up to three of these Expansion Packs to your base AgXRP Starter Kit, allowing you to automate and monitor four independent planting zones at the same time.
Specifications:
- Sensing: Capacitive sensing over I2C
- Controller: CY8CMBR3102 Controller
- I2C address: Software Configurable I2C Address (Default: 0x37)
- Ruler: On Board Ruler (Imperial and Metric units)
- Connectors: 2x Qwiic Connectors
- STAT LED: Blue STAT LED (Connects to general-purpose output pin)
- Power LED: Red Power LED
Best suited to classrooms, makerspaces and ag-tech experiments that already use the AgXRP Starter Kit and want to expand into multi-zone plant monitoring and watering.
Jargon buster
Plain-language definitions for the technical terms used above.
- capacitive sensing
- Capacitive sensing detects changes in electrical capacitance caused by a nearby object or material, such as a finger, water, or moisture in soil. It is used for touch buttons, proximity detection, and liquid or moisture-level sensing, and it matters because it can work without exposed metal contacts, avoiding the corrosion that bare probes suffer in damp conditions.
- CY8CMBR3102
- The CY8CMBR3102 is a Cypress (now Infineon) CapSense capacitive-sensing controller chip that detects capacitive touch or proximity inputs and reports them to a host microcontroller, usually over I2C. Knowing the exact part number helps when looking up the datasheet, libraries, and register or configuration options.
- encoder
- An encoder is a sensor that converts the rotation or position of a shaft, knob or dial into electrical signals, reporting movement as incremental steps and direction, or as an absolute position. It is used to track how far something has turned, which matters for precise positioning, speed control, repeatable movement, or using a rotary knob as an input.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- peristaltic pump
- A peristaltic pump moves liquid by squeezing flexible tubing in a rolling motion, so the liquid only ever touches the inside of the tube. This matters when dosing small, repeatable amounts of fluid or pumping liquids that must stay uncontaminated, because the pump's moving parts never contact the liquid.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
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