Documented engineering work, from a full problem-to-solution case study through representative PCB, wireless and automation hardware examples.
A full case study, documented in detail on our technical blog including a demo video — summarised here against the framework we use to scope engineering projects.
Engineering challenge: Wi-Fi range is short, cellular networks need a SIM card, and internet-based systems aren't always available in the field — all of which make remote messaging expensive and unreliable in industrial and outdoor deployments.
Hardware architecture & communication technology: An ESP32-based gateway and a remote, battery-powered ESP32 LoRa node, linked over a long-range LoRa wireless connection. Flow: mobile app → ESP32 gateway → LoRa network → remote LoRa node — no internet or SIM card required at any point.
PCB design & firmware: Custom PCB design for both the gateway and the node, OLED display support on the node, and ESP32 firmware handling LoRa communication, message routing and battery-powered operation.
Result: Working real-time, one-to-many wireless messaging with no internet or SIM dependency — demonstrated end-to-end in the video on the full case study.
A custom ESP32 control board designed in EasyEDA and manufactured and assembled at JLCPCB.
Hardware: ESP32-WROOM-32E module with BOOT and RESET buttons, an onboard motor driver with screw-terminal outputs, servo outputs, status LEDs and an SPI header (CS, CLK, MISO, MOSI) for expansion.
Power design: dual input from USB-C and a DC barrel jack, an input fuse for protection and onboard voltage regulation feeding the ESP32 and the load side.
Our work: schematic design, PCB layout, part selection from JLCPCB's assembly library, BOM and pick-and-place files, and testing of the assembled board.
Photos from recent PCB design, wireless node, automation and marine hardware work. Project and client details for this work are confidential; the categories below reflect the type of engineering involved.
Production-ready circuit boards for embedded systems and product prototypes. Work spans schematic capture, layout and DFM review for boards intended to go into manufacturing without a redesign cycle.
LoRa, ESP32, UWB and sensor nodes for remote monitoring. Includes RF-aware layout, antenna placement and the firmware handling the wireless link and power management.
Sensor monitoring, control boards and firmware-driven automation. Covers sensor interfacing, relay/motor control circuitry and the firmware coordinating them for unattended operation.
Ship power, bearing and wave-height monitoring nodes in corrosion-resistant enclosures. Built around sealed enclosures and sensor integration suited to continuous outdoor and onboard use.
Beyond the projects above, our technical blog covers PCB design practice, ESP32/STM32 firmware and wireless systems in more depth.
Send your requirements and we'll tell you how we'd approach it.