Ingredient
Acorn rover
Also known as: Twisted Fields Acorn
Open-source solar-powered autonomous farm rover — a 4-wheel-independent-steering electric platform built by Twisted Fields (Half Moon Bay, CA) for small-and-medium-scale row-crop farming. The right ingredient when the task demands actual mobility on field-scale acreage rather than a fixed gantry. ~1 kW peak motor power, 600 W solar charging on platform, 3 kWh lithium battery, ~16 km/h max speed, ~5 hours of work per solar day. Mechanical design open under CERN-OHL-W; software stack uses ROS2 and is fully open. Twisted Fields sells reference kits but the design is intended for independent build. The closest open analog to John Deere's See & Spray and other commercial autonomous-row-crop machines.
Architecture
- Drivetrain: 4 independent BLDC hub motors with independent steering — full holonomic motion
- Power: 600W solar panel array on platform; 3 kWh battery; nominally self-sustaining at row-crop work rates
- Compute: [[nvidia-jetson|Jetson Xavier NX]] or Orin running ROS2 (perception, planning); separate motor-control MCU
- Perception: scanning LiDAR + [[rgbd-camera|RGB-D camera]] + [[gps-rtk|GPS-RTK]] + IMU
- Tooling: flat platform supports custom tool attachments (weeder, sprayer, transplanter, cultivator)
Solves / unlocks
- Autonomous row-crop work on small-to-medium farm acreage
- Solar-powered field operations (energy-positive on most days)
- Replacement of small-scale tractor work for chemical-free farms
- Daily autonomous scouting (drive every row, image every plant)
- Targeted hand-tool work scheduling (rover identifies which beds need human attention)
- Autonomous transplanting and seeding for small-grain and vegetable rows
Constraints
- Build [[complexity|complexity]] — assembling an Acorn from scratch is a serious project; multi-month effort even for experienced builders.
- Field readiness is the gap between demo and reliable production — Twisted Fields publishes honestly about ongoing work.
- Reference-kit price — full kit pricing changes; budget several thousand to ten-thousand-plus dollars.
- Software is research-grade — autonomous-mode reliability depends on the operator; supervise initially.
Source
- Project: https://twistedfields.com/acorn-precision-farming-rover/
- Hardware repo: https://github.com/Twisted-Fields/acorn-precision-farming-rover (CERN-OHL-W)
- Software repo: https://github.com/Twisted-Fields/acorn-platform (Apache 2.0)
- Build documentation: linked from project page
See also
Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.
- Parallels: [[farmbot-genesis]]
- Member of: [[ingredient]]
- Combines with: [[ros2]] · [[nvidia-jetson]] · [[lidar-rangefinder]] · [[rgbd-camera]]
What links here, and how
Inbound connections from across the wiki, grouped by lens and by relationship. These appear automatically — every entity page declares what it links to, and that data populates here on the targets.
Practical
contains
- Farm-tech toolkit whole machine / open-source solar-powered autonomous rover
parallels
- FarmBot Genesis FarmBot is fixed-bed CNC; Acorn is mobile rover — complementary form factors for open-source farm robotics
combines with
- GPS-RTK Acorn uses GPS-RTK as the primary global position reference
- IMU (MPU6050 / BNO085) Acorn uses IMU for tilt sensing and dead-reckoning between GPS updates
- LiDAR rangefinder Acorn rover reference design uses scanning LiDAR for in-field navigation
- Lithium BMS (LiFePO₄ battery management) Acorn's lithium pack uses a smart BMS with cell-level telemetry to its main compute
- NVIDIA Jetson Acorn's reference architecture uses Jetson for vision + planning
- ROS 2 Acorn rover reference design is built on ROS2
- Solar charge controller (MPPT) Acorn's solar-charging architecture uses an MPPT controller between the rooftop panels and the lithium pack
combines
- Recipe: autonomous row-crop weeder the mobile platform — solar-powered 4WD/4WS chassis
10 inbound links · 6 outbound