LoRaWAN Magnetic Temperature Humidity Sensor
Budget: $30 – $250 USD
1. General Objective
To design, verify, and develop a functional prototype of a low-power, autonomous LoRaWAN sensor that integrates temperature, humidity, and magnetic detection measurements, powered by an ER14505 battery, ensuring the correct operation of the hardware for integration with the firmware provided by the client.
2. Specific Objectives
To review and validate the electrical schematic developed in KiCad, guaranteeing its correct operation, electrical integrity, and compatibility with the firmware.
To design and optimize the printed circuit board (PCB) meeting criteria for low power consumption, compactness, and manufacturability.
To prepare a fully assembled functional prototype for field testing and electrical validation.
To deliver all technical documentation associated with the design.
3. Detailed Technical Scope
3.1 Schematic Review
Complete review of the schematic developed in KiCad.
Validation of connections, pin assignments, and compatibility between modules.
Verification of voltage levels, currents, and input/output protection.
Confirmation of the correct use of component part numbers and footprints according to the Bill of Materials (BOM).
Suggestion of design improvements focused on low power consumption and robustness.
Validation of the ER14505 battery connection (3.6 V Li-SOCl₂) with protection and standby current draw <10 µA.
3.2 PCB Design
Design of the PCB in KiCad (1 or 2 layers, depending on the circuit requirements).
Optimized component layout to minimize interference and electrical noise.
Implementation of ground planes, filtering of sensitive signals (analog sensors), and differential routing if applicable.
Sizing and placement of the connector or pads for programming, testing, and battery.
Review of design rules (DRC/ERC).
Generation of Gerber files, updated BOM, and pick-and-place list for manufacturing.
3.3 Functional Prototyping
Manufacturing and assembly of one (1) or more prototype boards (PCBWAY or JLCPCB may be used).
Verification of continuity, reference voltages, and basic sensor functionality.
Delivery of an electrical validation report (firmware not included).
Testing with the ER14505 battery under real-world operation.
4. Deliverables
KiCad source files (.sch, .kicad_pcb, .lib, .dcm, .3d).
Production files (Gerber, Bill of Materials, Pick & Place).
Technical report reviewing and validating the design.
Assembled and tested physical prototype.
Documentation of electrical connections and test points.
5. Exclusions
Firmware development and microcontroller programming are not included.
Enclosure integration and mechanical design are not included.
Radio or electromagnetic compatibility certifications are not included.
To design, verify, and develop a functional prototype of a low-power, autonomous LoRaWAN sensor that integrates temperature, humidity, and magnetic detection measurements, powered by an ER14505 battery, ensuring the correct operation of the hardware for integration with the firmware provided by the client.
2. Specific Objectives
To review and validate the electrical schematic developed in KiCad, guaranteeing its correct operation, electrical integrity, and compatibility with the firmware.
To design and optimize the printed circuit board (PCB) meeting criteria for low power consumption, compactness, and manufacturability.
To prepare a fully assembled functional prototype for field testing and electrical validation.
To deliver all technical documentation associated with the design.
3. Detailed Technical Scope
3.1 Schematic Review
Complete review of the schematic developed in KiCad.
Validation of connections, pin assignments, and compatibility between modules.
Verification of voltage levels, currents, and input/output protection.
Confirmation of the correct use of component part numbers and footprints according to the Bill of Materials (BOM).
Suggestion of design improvements focused on low power consumption and robustness.
Validation of the ER14505 battery connection (3.6 V Li-SOCl₂) with protection and standby current draw <10 µA.
3.2 PCB Design
Design of the PCB in KiCad (1 or 2 layers, depending on the circuit requirements).
Optimized component layout to minimize interference and electrical noise.
Implementation of ground planes, filtering of sensitive signals (analog sensors), and differential routing if applicable.
Sizing and placement of the connector or pads for programming, testing, and battery.
Review of design rules (DRC/ERC).
Generation of Gerber files, updated BOM, and pick-and-place list for manufacturing.
3.3 Functional Prototyping
Manufacturing and assembly of one (1) or more prototype boards (PCBWAY or JLCPCB may be used).
Verification of continuity, reference voltages, and basic sensor functionality.
Delivery of an electrical validation report (firmware not included).
Testing with the ER14505 battery under real-world operation.
4. Deliverables
KiCad source files (.sch, .kicad_pcb, .lib, .dcm, .3d).
Production files (Gerber, Bill of Materials, Pick & Place).
Technical report reviewing and validating the design.
Assembled and tested physical prototype.
Documentation of electrical connections and test points.
5. Exclusions
Firmware development and microcontroller programming are not included.
Enclosure integration and mechanical design are not included.
Radio or electromagnetic compatibility certifications are not included.