GrowMax v1.1 board

Name: GrowMax v1.1 board
SKU: 28497
Price: 32.00 USD
Availability: InStock

Plug in a Raspberry Pi Pico and control up to 8 small submersible pumps and moisture sensors, and much more!

Designed by OpenSensor.io in United States of America

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Plug in a Raspberry Pi Pico and control up to 8 small submersible pumps and moisture sensors, and much more!

What is it? The GrowMax v1.1 board, for use w/ Raspberry Pi Pico platform gives the ability to control 8 discrete micro submersible 5v pumps and read from corresponding moisture sensors. We recommen…

What is it?

The GrowMax v1.1 board, for use w/ Raspberry Pi Pico platform gives the ability to control 8 discrete micro submersible 5v pumps and read from corresponding moisture sensors. We recommend using Pimoroni Grow sensors, which are entirely plug and play with this board. Support for Eight discrete plants:

8 Moisture sensor ports (3 pin JST-SH)
8 Pump controls (2 pin pico-blade)
Note: The growmax open source software never operates more than one pump at a time due to power limitation of 300mA from the pico.
Moisture sensor ports intended for use with a Pimoroni moisture sensor and is fed from 3.3V
Pump ports are mosfet powered by 5V VBUS (2 pin pico-blade) with kickback voltage buffer.
Two dedicated ports (3 pin pico blade) powered by 5v VBUS with 4V to 3.3V voltage divider of the input intended for pairing with Optomax liquid level sensors (for detecting low and high water marks on a reservoir).
Both dedicated I2C channels exposed with Qwiic Stemma/QT connectors on board.
Common use case for I2C is connecting external sensor arrays to the board for data collection, adding a display, or driving higher power applications with an I2C relay board.
The three ADC channels of the Pico are exposed as well as the last GPIO pin of the pico as 3 pin pico-blade connectors powered by 3.3V

NOTE: This device should always be powered by 5V USB as it was not designed to run off a 3.7V battery, for example.

Pictured: the board mounted to wood using arcade brackets is for display only--we do not sell the board pre-mounted. In order to use arcade-style mounting brackets, you would need to slightly widen the mounting holes with a 1/8" drill bit.

Pico not included -- board is fully assembled.

Why did you make it?

To automate watering and monitoring of indoor plants.

What makes it special?

This board is first of its kind for the Raspberry Pi Pico platform, making full use of the Pico feature set: it is low power, light weight and effective for minimizing the care requirements of indoor plants. The growmax software is open source Micropython package released to pypi; it is configurable and even extensible with minimal programming experience.