Smart Agriculture Controller Design
Worked for 3 mins 2 sec
The first schematic pass is wired for USB-C programming, ESP32, sensor headers, RS485, relays, and protected power rails. I’m running ERC now and will fix the obvious schematic issues before moving to layout.
Worked for 1 min 30 sec
Implemented a first schematic draft for SeedSphere Smart Agriculture Controller: renamed the project, created the project specification, selected core parts, added/wired the ESP32, USB-C/CP2102N programming path, power rails, RS485, sensor connectors, BNC placeholders, relay outputs, protection parts, and mounting holes.
Open items:
- ERC still shows expected warnings from unfinished support circuitry and placeholders.
- The 12V→5V buck converter support network, pH/EC analog conditioning, LED wiring, and final 3.3V regulator choice need cleanup before PCB layout.
- I documented the details here: Pin Mapping and Open Items and the spec here: Project Specification.
Suggested next steps:
- Finish the buck converter and 3.3V regulator section.
- Add proper pH/EC signal-conditioning circuits.
- Clear ERC warnings.
- Then proceed to 100 mm × 80 mm PCB placement and routing.
Finish schematic cleanup
Complete power section
Add analog conditioning
Clear ERC warnings
Explain regulator choice
Refine this doc
Ask about this doc
SeedSphere Smart Agriculture Controller — Project Specification
Goal
Design a professional, compact, two-layer PCB for an ESP32-based outdoor smart agriculture monitoring system suitable for final-year project demonstration and future product expansion.
Baseline Scope
- ESP32-WROOM-32E controller with USB-C power/programming, USB-UART bridge, auto-reset/boot, reset and boot buttons.
- 5 V input from USB-C and optional 12 V DC input with protection, 12 V-to-5 V buck, and 3.3 V regulation.
- Sensor interfaces: soil moisture, DHT22, pH BNC, EC BNC, RS485/NPK, water level, rain, LDR, OLED I2C, GPS/UART, SPI/I2C/UART/GPIO expansion.
- Two relay outputs with transistor drivers, flyback diodes, indicators, and screw terminals.
- Protection: fuse, reverse-polarity protection, TVS/ESD where practical, decoupling, test points.
- PCB target: 100 mm × 80 mm, 2 layers, FR-4 1.6 mm, 1 oz copper, green mask, white silkscreen, four M3 mounting holes.
Deferred / Optional
Battery charger, solar charging, LoRa, GSM, and camera connector footprints may be added as reserved interfaces unless the design becomes too dense for a reliable first revision.
Design Priorities
- Reliable ESP32 programming and boot.
- Robust field wiring and power protection.
- Clear connector labels for beginner-friendly assembly and testing.
- Manufacturable with JLCPCB/PCBWay standard processes.
Validation Deliverables
- Schematic/ERC review.
- PCB DRC/airwire review after layout.
- BOM and manufacturing exports once routing is complete.
- Pin mapping and bring-up documentation.
Goal
Baseline Scope
Deferred / Optional
Design Priorities
Validation Deliverables
