Industrial IoT PCB Design: Schematic Review, ESP32 Update, Engineering Optimization & Full EasyEDA Layout
Budget: $30 – $250 USD
I am looking for a skilled electronics/PCB design freelancer for an industrial IoT device. This is not just a simple PCB layout job. The work includes schematic review, correction, engineering optimization, ESP32 module update, and complete PCB layout in EasyEDA for a compact and reliable product intended for long-term industrial use.
Scope of Work:
Review and correct the existing schematic
Update the ESP32 model/module where needed and improve the design accordingly
Optimize the circuit for power stability, EMI/noise immunity, grounding, filtering, and reliability
Design a full 2-layer PCB layout from scratch in EasyEDA
Use LCSC-preferred components where practical
Improve the design for industrial stability and 3+ years reliable operation
Key Technical Requirements:
12–24V DC industrial input with proper protection and stable regulation
Source may be noisy, so design must handle spikes, variation, and interference
ESP32 WiFi is included, so RF layout quality matters
RFID must be integrated into the PCB, preferably under the display, with target read distance around 2.5 cm
Need a practical solution to reduce interference between WiFi and RFID
There is an existing issue in the optocoupler-based auto-cutter signal detection causing noise, false triggering, and instability — this must be properly analyzed and fixed
Mechanical / Layout Constraints:
PCB configuration and reference image will be provided
Mechanical alignment must be followed carefully
Maximum component height = 4 mm (strict)
Compact design is important
Workflow:
Review schematic and suggest improvements
Submit component placement draft first
Final routing only after placement approval
Deliverables:
EasyEDA source file
Gerber files
Pick and Place file
Updated BOM
Brief engineering notes explaining major design decisions
Timeline:
Expected completion: 3–4 days, with balanced speed and quality.
What I Want From You in Proposal:
Please briefly explain:
Your approach for updating the ESP32 model/module
Your approach for RFID integration under the display
How you will manage WiFi + RFID coexistence/interference
Your strategy for stable 12–24V industrial power design
How you will solve the optocoupler false triggering/noise issue
Any improvement suggestions you recommend
Important:
Only apply if you have real experience in:
Industrial/embedded PCB design
Power integrity / EMI reduction
ESP32 hardware design
RFID integration
EasyEDA
Scope of Work:
Review and correct the existing schematic
Update the ESP32 model/module where needed and improve the design accordingly
Optimize the circuit for power stability, EMI/noise immunity, grounding, filtering, and reliability
Design a full 2-layer PCB layout from scratch in EasyEDA
Use LCSC-preferred components where practical
Improve the design for industrial stability and 3+ years reliable operation
Key Technical Requirements:
12–24V DC industrial input with proper protection and stable regulation
Source may be noisy, so design must handle spikes, variation, and interference
ESP32 WiFi is included, so RF layout quality matters
RFID must be integrated into the PCB, preferably under the display, with target read distance around 2.5 cm
Need a practical solution to reduce interference between WiFi and RFID
There is an existing issue in the optocoupler-based auto-cutter signal detection causing noise, false triggering, and instability — this must be properly analyzed and fixed
Mechanical / Layout Constraints:
PCB configuration and reference image will be provided
Mechanical alignment must be followed carefully
Maximum component height = 4 mm (strict)
Compact design is important
Workflow:
Review schematic and suggest improvements
Submit component placement draft first
Final routing only after placement approval
Deliverables:
EasyEDA source file
Gerber files
Pick and Place file
Updated BOM
Brief engineering notes explaining major design decisions
Timeline:
Expected completion: 3–4 days, with balanced speed and quality.
What I Want From You in Proposal:
Please briefly explain:
Your approach for updating the ESP32 model/module
Your approach for RFID integration under the display
How you will manage WiFi + RFID coexistence/interference
Your strategy for stable 12–24V industrial power design
How you will solve the optocoupler false triggering/noise issue
Any improvement suggestions you recommend
Important:
Only apply if you have real experience in:
Industrial/embedded PCB design
Power integrity / EMI reduction
ESP32 hardware design
RFID integration
EasyEDA