# ASAS Sensor Node: Hardware Overview
ASAS Sensor Nodes are built with custom-designed PCBs and core technologies optimized for demanding IoT applications.
# General Features
- Custom-Designed PCB: Allows for flexible sensor integration and optimized performance. Specific models, like the weather station, also feature custom PCBs.

- Weather-Resistant Enclosure: Ensures durability and reliable operation in challenging field conditions.

- Easy Deployment: Designed for plug-and-play installation and minimal maintenance.
# Communication

- LoRaWAN Connectivity: Integrated LoRaWAN communication for long-range, low-power data transmission to ASAS Gateways.
- Frequency Band: Operates in AS923
- Network Topology: Supports standard LoRaWAN network configurations and can benefit from ASAS LoRaWAN Mesh networks for extended coverage.
# Power System
- Integrated Solar Charging: Many nodes feature an integrated solar charging system.
- Built-in Battery: Equipped with a built-in battery for continuous operation, even during periods of low sunlight.
- Sustainable Power Solution: Designed for long-term, autonomous operation in the field.
# Sensor Integration (General Purpose Node)
- Flexible Interfaces: The custom PCB design for nodes like the NPK sensor offers universal compatibility with various sensors through multiple interface options, including I2C, UART, and RS485.
- Customizable Calibration: Supports customizable calibration capabilities for attached sensors to ensure data accuracy.
For detailed specifications of individual sensor node types, please refer to the Sensor Types section.