2 layers128 × 41.5 mm
Weather station ext
rbat05/SolarWeatherStation
Self-sustaining weather monitoring system with dual-node architecture.
16 parts2GPL-3.0
2 layers68.5 × 57.5 mm
RescueMesh uses a Long Range Communication System to send SOS signals to a central database where the rescue data is sent even without any mobile connectivity.
- Size
- 68.5 × 57.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 8
- Pads
- 22
- Tracks, vias
- 54, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Dec 2025
- Updated
- 7 May 2026
Overview
Load Sharing PCB is an open-source printed circuit board by HiranGeeth, from the HiranGeeth/RescueMesh-Disaster-Rescue_Long-Range-Communication-System repository on GitHub, published under the MIT licence. It is a 2-layer board of 68.5 × 57.5 mm with 8 parts on 8 nets, routed with 54 tracks and 0 vias.
It is built around the FQP27P06 and TP4056. Its parts include 5 connectors, 1 resistor, 1 diode and 1 transistor.
Main components
2README
README.mdRescueMesh-Flood_Rescue_LoRa_System
🌊 Flood Data Collecting & Rescue-Aided LoRaWAN System
Overview
This project implements a low-power, long-range LoRaWAN system for flood data collection and emergency rescue notifications.
Using ESP32 microcontrollers paired with AS32-TTL-100 LoRa modules, the system enables wireless sensor networking, SOS message broadcasting, and remote monitoring with low latency and high reliability.
The firmware is modular and structured, supporting incremental testing from GPIO/UART sanity checks to full production-ready emergency node firmware.
Key Features
- Wireless Communication: 433MHz LoRa spread spectrum with up to 3 km range (line of sight).
- Ultra-Low Power: Sleep current as low as 1.5 µA; supports wake-on-radio mode.
- Robust Transmission: Automatic relays, point-to-point and broadcast messaging, deduplication, and retransmission.
- Configurable Parameters: UART baud rates (1200–115200 bps), air speeds (0.3–19.2 kbps), transmit power levels, and channels.
- Data Security: Built-in encryption support for sensitive data.
- Modular Firmware: Structured code plan enabling step-by-step testing and integration.
Hardware Requirements
- ESP32 NodeMCU Development Board (CH340)
- AS32-TTL-100 LoRa Module
- Optional Sensors: water level, rainfall, or environmental monitoring
- Power Supply: 3.3–5.5 VDC
Firmware Code Plan
- Code 1.0: ESP32 GPIO & UART Sanity Test
- Code 1.0.2: AS32 Transparent Test (Factory Settings) – Range Testing
- Code 1.1: AS32 Parameter Read Code
- Code 1.1.1: AS32 Parameter Write Code
- Code 1.2: Point-to-Point Messaging
- Code 1.2.1: Broadcast & Monitor Mode
- Code 1.3: RSSI & Link Quality Test
- Code 1.3.1: Deduplication Test
- Code 1.3.2: Wake-on-Radio Test
- Code 1.3.3: Emergency Button Node Firmware
- Code 1.4: Gateway Aggregation
- Code 1.4.1: Backend Upload
- Code 1.5: Production Firmware
AS32-TTL-100 Shared Configuration
- Module Address:
ADDH = 0x00,ADDL = 0x00 - UART / Air Configuration:
SPEED = 0x1A(9600 bps, 2.4 kbps air) - Channel:
CHAN = 0x17(433 MHz) - Operation Mode & Options:
OPTION = 0x40(transparent, push-pull, 250 ms wake, max TX power)
Project Features & Capabilities
- Transparent broadcasting and monitoring
- Point-to-point transmission across channels
- Wake-on-radio for ultra-low power nodes
- Deduplication of messages for network efficiency
- Configurable retransmission delays and TTL
- Real-time RSSI and link quality monitoring
Getting Started
- Clone the Repository
bash git clone https://github.com/HiranGeeth/RescueMesh-Flood_Rescue_LoRa_System.git
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 1N5822 Diode | Diode_THT:D_DO-201AD_P3.81mm_Vertical_AnodeUp | D1 |
| 1 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J4 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | FQP27P06 | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | MT3608 module | MT3608:MT3608_module | J3 |
| 1 | Switch | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J5 |
| 1 | TP4056 | TP4056_charging_module:TP4056-18650 | J2 |
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Questions
How big is the Load Sharing PCB PCB?
It measures 68.5 × 57.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Load Sharing PCB use?
8 parts, built around the FQP27P06 and TP4056. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Load Sharing PCB KiCad files?
From the HiranGeeth/RescueMesh-Disaster-Rescue_Long-Range-Communication-System repository on GitHub, at the commit this page was made from: the board is hardware/Power Path Management Circuit/pcb/Load Sharing PCB.kicad_pcb and its schematic hardware/Power Path Management Circuit/Shematics/Load Sharing PCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Load Sharing PCB design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).