PCB Design for OBD-II Telemetry Device
Budget: €750 – €1,500 EUR
I'm seeking an expert PCB designer to develop the schematics and layout for an OBD-II telemetry device integrated with ELM327.
We are looking for an experienced electronics engineer or team to design the schematics and PCB layout for a custom OBD-II telemetry device inspired by the Freematics One+ Model H (see reference: https://freematics.com/products/freematics-one-plus-model-h/).
The device will connect to a vehicle's OBD-II port and send telematics data (via CAN bus) through a cellular module (e.g. SIM7600 or similar), just like the Freematics device.
The design must integrate an ELM327-compatible IC (or a proven equivalent solution) to enable OBD-II data reading over CAN bus using ELM327 AT commands.
Key Deliverables:
- A complete schematic diagram in preferred formats like KiCad, Eagle, or Altium
- A full PCB layout ready for fabrication
- A detailed BOM (Bill of Materials) with recommended components
- Clear indication of power supply design and voltage regulation
- Optional but appreciated: A brief documentation explaining the design rationale and module integration choices
Technical Requirements:
- Based on ESP32 MCU (same or similar to the Freematics design)
- Integration of CAN transceiver and support for standard OBD-II protocols
- Integration of ELM327-compatible module or functionality
- Support for SIM7600 4G LTE module (or alternative cellular module)
- Power input via OBD-II port, including over-voltage and reverse polarity protection
- Compact design suitable for a vehicle-mounted enclosure
- integration of GPS (e.g., u-blox module)
While there are no strict size constraints, the PCB should not be too large. Experience with telemetry devices and PCB design for automotive applications would be highly beneficial.
We are looking for an experienced electronics engineer or team to design the schematics and PCB layout for a custom OBD-II telemetry device inspired by the Freematics One+ Model H (see reference: https://freematics.com/products/freematics-one-plus-model-h/).
The device will connect to a vehicle's OBD-II port and send telematics data (via CAN bus) through a cellular module (e.g. SIM7600 or similar), just like the Freematics device.
The design must integrate an ELM327-compatible IC (or a proven equivalent solution) to enable OBD-II data reading over CAN bus using ELM327 AT commands.
Key Deliverables:
- A complete schematic diagram in preferred formats like KiCad, Eagle, or Altium
- A full PCB layout ready for fabrication
- A detailed BOM (Bill of Materials) with recommended components
- Clear indication of power supply design and voltage regulation
- Optional but appreciated: A brief documentation explaining the design rationale and module integration choices
Technical Requirements:
- Based on ESP32 MCU (same or similar to the Freematics design)
- Integration of CAN transceiver and support for standard OBD-II protocols
- Integration of ELM327-compatible module or functionality
- Support for SIM7600 4G LTE module (or alternative cellular module)
- Power input via OBD-II port, including over-voltage and reverse polarity protection
- Compact design suitable for a vehicle-mounted enclosure
- integration of GPS (e.g., u-blox module)
While there are no strict size constraints, the PCB should not be too large. Experience with telemetry devices and PCB design for automotive applications would be highly beneficial.