Compact Ethernet Heartbeat Monitor
Budget: $50 – $500 AUD
I need a hardware designer who can take my concept for a compact “heartbeat” monitor and turn it into a fully-tested PCB that I can drop straight into network control boxes. The unit must run on a 12 V supply, use an ESP32 or similar, and expose a standard Ethernet port. Once powered, it should sense the input voltage, confirm link integrity, and—on a watchdog timer—send a small JSON payload via HTTP POST to my web server. I’ll handle all firmware in C++; what I’m after is the electronics and the board itself.
Key points
• 12 V input with on-board regulation suitable for the ESP32
• Reliable standard-speed Ethernet (no PoE needed)
• Voltage and link-status monitoring lines broken out for code access
• Footprint kept as small as practical for enclosure mounting
Deliverables for the initial prototype
1. Complete schematic, PCB layout files, and BOM (Gerber, Pick-and-Place, etc.)
2. One fully assembled, tested board ready for firmware flashing
3. Brief test report confirming stable 12 V tolerance, Ethernet link, and sensor outputs
If the prototype performs as expected, I’ll commission a first batch of at least ten units, with a view to scaling to 100+ in production.
Key points
• 12 V input with on-board regulation suitable for the ESP32
• Reliable standard-speed Ethernet (no PoE needed)
• Voltage and link-status monitoring lines broken out for code access
• Footprint kept as small as practical for enclosure mounting
Deliverables for the initial prototype
1. Complete schematic, PCB layout files, and BOM (Gerber, Pick-and-Place, etc.)
2. One fully assembled, tested board ready for firmware flashing
3. Brief test report confirming stable 12 V tolerance, Ethernet link, and sensor outputs
If the prototype performs as expected, I’ll commission a first batch of at least ten units, with a view to scaling to 100+ in production.