ESP32-CAM Custom PCB & Enclosure Design
Budget: $250 – $500 USD
Hardware Engineer: Custom ESP32-CAM PCB & Enclosure Design (DFM & Mass Production)
Project Overview
I have a validated IoT prototype based on the AI-Thinker ESP32-CAM (OV2640). I am seeking a professional hardware engineer to transition this design from a development board to a production-ready product suitable for mass production. The project involves a custom PCB layout and a matching industrial enclosure design optimized for injection molding.
1. PCB Design & Engineering Requirements
The goal is to create an optimized PCB that removes unnecessary components from the standard development board while adding specific status and control features.
Core Functionality & Deletions
• Retain: ESP32-S module (as WiFi, BLE4.2 functionalities are essential) , OV2640 camera interface, and the high-brightness Flash LED on GPIO 4. - The flash LED must be positioned at least 1.5 inch away from the camera lens to minimize glare and improve image quality..
• Remove: Eliminate the un-used microSD card slot; any user-facing EN (RESET) button and BOOT/IO0 button present on dev board designs.
• Addition: 1 × common cathode RGB LED as a system status indicator. 1 × Factory reset button wired active‑low (GPIO based, not EN)
• Connector Update: Replace the existing micro‑USB connector with a USB‑C port used strictly for power input.
Power & Programming Strategy
• USB Port: Retain a USB port (USB-C) for power supply purposes only.
• No USB-to-UART Bridge: Do not include an onboard USB-to-UART chip (e.g., CP2102).
• Programming Interface: Include Test Points (RX, TX, GPIO0, EN, GND, 3.3V) on the bottom of the PCB for a pogo-pin factory programming jig. The PCB must be fully prepared for firmware flashing and functional testing in a separate factory.
• Firmware Workflow: Basic test firmware will be flashed during PCB fabrication via the test points. The factory firmware will be flashed in a separate factory. The official firmware will be loaded via OTA (Over-The-Air) once the factory firmware is running.
GPIO Assignments & Safety
The following pins are assigned for status and control. The engineer must ensure these pins are safe to use (checking strapping pin states) and make recommendations if adjustments are necessary to ensure boot stability.
Component Pin Assignment Notes
Factory Reset GPIO 3 Momentary tactile button (Active Low).
Red LED GPIO 2 Status Indicator.
Blue LED GPIO 12 Status Indicator.
Green LED GPIO 13 Status Indicator.
Flash LED GPIO 4 Preserve existing functionality.
RF & Antenna
• Provide an optimized trace for an internal PCB antenna.
• Include an option/switch (e.g., 0-ohm resistor or jumper (preferred) ) for an external IPEX (U.FL) connector.
________________________________________
2. Enclosure Design (Mechanical Engineering)
A durable, functional housing designed for mass production via injection molding.
• Form Factor: Longer side should be compatible with standard smartphone holders.
• Mounting: Integrated 1/4”-20 threaded brass insert for tripod or gooseneck mounting.
• Interface: Light pipes (preferred) or cutouts for the RGB LED and an accessible Reset Button. The RGB LED must not face the same direction as the camera to prevent glare and ensure intuitive user interaction. Provide direct but protected access to the factory reset button (recessed or guarded).
• Environmental: Optimized for IP65 water resistance (sealed seams, gasket considerations, and lens protection).
________________________________________
Deliverables
• PCB: Design files (KiCad schematic, KiCad PCB layout, KiCad project files,...); Fabrication outputs (Gerbers [RS-274X], Drill files, Pick‑and‑place files, BOM [ Part name, Quantity, Manufacturer, and Part number], Schematic [PDF and Source]).
• Test Firmware: A minimal diagnostic firmware that verifies: USB‑C power input, Wi‑Fi, BLE 4.2, OV2640 camera interface, status RGB LED, Flash LED and Factory Reset button.
• Mechanical: 3D CAD files (STEP/STL), 2D drawings with tolerances, Exploded view and assembly instructions, DFM recommendations, including: Material selection, Wall thickness, Draft angles, Bosses and inserts and IP sealing strategy.
• Documentation: Assembly guide and a basic functional test procedure for factory quality control.
• DFM Report: Summary of manufacturing recommendations for US, Taiwan, or China-based fabricators.
________________________________________
Project Structure & Skills
• Milestones: 1. Schematic/Layout Approval → 2. Gerbers & 3D Mock-up → 3. Final Production Files.
• Required Skills: KiCad (preferred), ESP32 hardware architecture, RF layout, and Injection Molding design.
• Prior experience designing custom ESP32 based PCBs is a significant advantage
________________________________________
How to Apply
Please provide examples of previous "PCB + Enclosure" projects you have completed. In your proposal, confirm your review of the GPIO strapping pin requirements.
________________________________________
Project Overview
I have a validated IoT prototype based on the AI-Thinker ESP32-CAM (OV2640). I am seeking a professional hardware engineer to transition this design from a development board to a production-ready product suitable for mass production. The project involves a custom PCB layout and a matching industrial enclosure design optimized for injection molding.
1. PCB Design & Engineering Requirements
The goal is to create an optimized PCB that removes unnecessary components from the standard development board while adding specific status and control features.
Core Functionality & Deletions
• Retain: ESP32-S module (as WiFi, BLE4.2 functionalities are essential) , OV2640 camera interface, and the high-brightness Flash LED on GPIO 4. - The flash LED must be positioned at least 1.5 inch away from the camera lens to minimize glare and improve image quality..
• Remove: Eliminate the un-used microSD card slot; any user-facing EN (RESET) button and BOOT/IO0 button present on dev board designs.
• Addition: 1 × common cathode RGB LED as a system status indicator. 1 × Factory reset button wired active‑low (GPIO based, not EN)
• Connector Update: Replace the existing micro‑USB connector with a USB‑C port used strictly for power input.
Power & Programming Strategy
• USB Port: Retain a USB port (USB-C) for power supply purposes only.
• No USB-to-UART Bridge: Do not include an onboard USB-to-UART chip (e.g., CP2102).
• Programming Interface: Include Test Points (RX, TX, GPIO0, EN, GND, 3.3V) on the bottom of the PCB for a pogo-pin factory programming jig. The PCB must be fully prepared for firmware flashing and functional testing in a separate factory.
• Firmware Workflow: Basic test firmware will be flashed during PCB fabrication via the test points. The factory firmware will be flashed in a separate factory. The official firmware will be loaded via OTA (Over-The-Air) once the factory firmware is running.
GPIO Assignments & Safety
The following pins are assigned for status and control. The engineer must ensure these pins are safe to use (checking strapping pin states) and make recommendations if adjustments are necessary to ensure boot stability.
Component Pin Assignment Notes
Factory Reset GPIO 3 Momentary tactile button (Active Low).
Red LED GPIO 2 Status Indicator.
Blue LED GPIO 12 Status Indicator.
Green LED GPIO 13 Status Indicator.
Flash LED GPIO 4 Preserve existing functionality.
RF & Antenna
• Provide an optimized trace for an internal PCB antenna.
• Include an option/switch (e.g., 0-ohm resistor or jumper (preferred) ) for an external IPEX (U.FL) connector.
________________________________________
2. Enclosure Design (Mechanical Engineering)
A durable, functional housing designed for mass production via injection molding.
• Form Factor: Longer side should be compatible with standard smartphone holders.
• Mounting: Integrated 1/4”-20 threaded brass insert for tripod or gooseneck mounting.
• Interface: Light pipes (preferred) or cutouts for the RGB LED and an accessible Reset Button. The RGB LED must not face the same direction as the camera to prevent glare and ensure intuitive user interaction. Provide direct but protected access to the factory reset button (recessed or guarded).
• Environmental: Optimized for IP65 water resistance (sealed seams, gasket considerations, and lens protection).
________________________________________
Deliverables
• PCB: Design files (KiCad schematic, KiCad PCB layout, KiCad project files,...); Fabrication outputs (Gerbers [RS-274X], Drill files, Pick‑and‑place files, BOM [ Part name, Quantity, Manufacturer, and Part number], Schematic [PDF and Source]).
• Test Firmware: A minimal diagnostic firmware that verifies: USB‑C power input, Wi‑Fi, BLE 4.2, OV2640 camera interface, status RGB LED, Flash LED and Factory Reset button.
• Mechanical: 3D CAD files (STEP/STL), 2D drawings with tolerances, Exploded view and assembly instructions, DFM recommendations, including: Material selection, Wall thickness, Draft angles, Bosses and inserts and IP sealing strategy.
• Documentation: Assembly guide and a basic functional test procedure for factory quality control.
• DFM Report: Summary of manufacturing recommendations for US, Taiwan, or China-based fabricators.
________________________________________
Project Structure & Skills
• Milestones: 1. Schematic/Layout Approval → 2. Gerbers & 3D Mock-up → 3. Final Production Files.
• Required Skills: KiCad (preferred), ESP32 hardware architecture, RF layout, and Injection Molding design.
• Prior experience designing custom ESP32 based PCBs is a significant advantage
________________________________________
How to Apply
Please provide examples of previous "PCB + Enclosure" projects you have completed. In your proposal, confirm your review of the GPIO strapping pin requirements.
________________________________________