Firmware Development Jobs

We are developing a proprietary MPPT solar charge controller for manufacture in China. We are looking for an experienced independent engineer to design and validate the Stage 1 prototype. The design Three-phase interleaved synchronous buck, 120° phase offset 40 A charge current, 12/24/48 V battery, PV input up to 100 V Switching frequency 30–50 kHz per phase, to be determined during the project GigaDevice GD32 microcontroller, CR Micro MOSFETs Firmware in C: perturb-and-observe MPPT, two-stage charging, self-calibration, UART telemetry Stage 1 is an instrumented test bed, not a product. No display, no keypad, no communications. The focus is thermal validation, phase current sharing, efficiency and switching behaviour. Deliverables Schematic, PCB files, BOM, commented firmwar...

TI-84 PLUS + ESP32-S3 + OV5640 AI CALCULATOR BUILDER SPECIFICATION 1. PROJECT OVERVIEW Build a modified TI-84 Plus non-CE calculator with an internally installed Seeed Studio XIAO ESP32-S3 Sense, OV5640 5MP autofocus camera, Wi-Fi, OpenAI API connectivity, TI-84 to ESP32 communication, and a calculator-side AI interface. System architecture: OV5640 camera -> ESP32-S3 -> Wi-Fi -> OpenAI API -> ESP32-S3 -> TI-84 -> Display The ESP32-S3 handles camera control, image processing, networking, and AI communication. The TI-84 provides the keyboard, display, user interface, and commands. Use the existing TI84-AI GitHub project by ivan-grebe as the primary software and architecture reference: Do not simply adapt an ESP32-C3 tutorial. This build specifica...

About SOILO SOILO is an Indian agri-tech company developing portable soil testing devices for agricultural applications. We are expanding our products into Namibia and are looking for a reliable local electronics technician/service partner. What we need We are looking for a technician or small electronics service company based in Namibia, preferably in or around Windhoek, who can provide local repair and warranty support for our devices. Expected work includes: Electronics/device diagnostics PCB troubleshooting Component-level repair where possible Display replacement Battery/charging system replacement ESP32/electronic module troubleshooting RS485/communication troubleshooting Connector/wiring repairs Sensor-related troubleshooting Firmware/basic configuration support where applicabl...

## Electronics Engineer Needed in Namibia – ESP32 IoT Device Debugging I am looking for an **Electronics / Embedded Systems Engineer or experienced Electronics Engineering student based in Namibia** to help troubleshoot and fix an ESP32-based IoT device. ### About the Device The device includes: * ESP32 * Custom PCB * Li-ion/LiPo battery and charging circuit * Power management circuitry * Sensors * TFT/OLED display * RS485 communication * Embedded firmware ### What I Need The selected person will need to **physically inspect and test the device** and identify the root cause of the hardware issue. The work may include: * PCB hardware debugging * Power rail and voltage measurements * Battery/charging circuit troubleshooting * ESP32 power and boot debugging * Sensor and communic...

I have a simple ESP32 prototype that reads sensor data and sends it to a dashboard via MQTT. The sensor works, but the MQTT connection keeps dropping randomly and losing data. I need someone to look at the code, fix the reconnection logic, and make it stable. Budget is $25 for this quick fix. If you do a good job and are easy to work with, I have a much bigger PCB design and industrial automation project I need a team for

I’m taking a new handset from concept to first hardware prototype and need the complete software layer designed and proven on Android. The focus is design and prototyping—specifically software design—so your task is to turn our board files and SoC documentation into a bootable, stable Android build. You’ll start with the raw schematics, a reference bootloader, and chipset manuals that I’ll supply. From there, I expect a tailored AOSP-based image or similarly lean Android flavour that: • boots on our development board • brings up display, touchscreen, audio, LTE, Wi-Fi, Bluetooth, sensors, and camera drivers • includes a demo UI/UX that shows core functions and allows basic performance testing Deliverables - Source-controlled Android build...

I have a single Echo Dot at home and I’d like it to respond to “Jarvis” instead of the usual Alexa wake word. All I need right now is the actual wake-word swap; I’m not looking to set up any extra custom commands or routines. Because Amazon doesn’t expose a simple on-device setting for completely new wake words, I’ll need a proven workaround—whether that involves the Alexa Custom Assistant framework, a carefully configured skill, a firmware-level tweak, or another reliable method you’ve already used in practice. The end goal is that when I say “Jarvis,” my Echo Dot wakes up exactly as it would with “Alexa,” with no noticeable lag or false triggers. Deliverables • Step-by-step instructions (or remote implementa...

I need an expert in embedded C to manage EEPROM operations (reading, writing, erasing) on an ARM Cortex microcontroller. Key Requirements: - Proficiency in embedded C - Experience with ARM Cortex microcontrollers - Knowledge of EEPROM operations Ideal Skills: - Embedded systems programming - NVM (especially EEPROM) handling - Debugging and optimization for ARM architectures Please include relevant experience in your bids.

Freelancer Required – SAW Welding Controller Development We are looking for an experienced Embedded Systems / PCB Design Engineer to develop a dedicated controller PCB for an SAW (Submerged Arc Welding) machine. The welding control logic has already been developed and tested on an Arduino development board. We now want to convert the existing prototype into a reliable, compact and industrial-grade controller PCB. Scope of Work * Review existing Arduino code and logic * Convert Arduino-based control logic to a suitable MCU platform such as STM32 * Design complete circuit schematic * Design industrial-grade PCB * 24 VDC industrial input/output * Isolated digital inputs and protected digital outputs * Analog inputs for welding voltage/current feedback * Welding voltage sensing with ...

MediaTek MT8168 Custom Android ROM Installation & Technical Support I’m looking for an experienced Android/MediaTek developer who can provide step-by-step technical guidance for installing or porting a fully functional custom Android ROM to a MediaTek MT8168-based tablet. The tablet currently has a restricted Android installation, and my goal is to replace it with a clean, stable, fully functional Android version that is properly configured for the device hardware. I am currently working with the tablet in its original, unrooted Android state. I do not have root access at this time, so I will need guidance on the appropriate process for gaining the necessary access and preparing the device for the ROM installation. If I need a rooted state or a Linux environment, that can be ...

I need a compact, production-ready PCB that brings together an ARM Cortex MCU with a temperature sensor, 3-axis accelerometer, optical heart-rate monitor, microphone, speaker and on-board flash. The board must seamlessly switch between battery operation and USB power, with integrated charging and safe power-path management so firmware updates and debugging over USB remain possible even while the battery tops up. Please handle the complete hardware flow: • Schematic capture • PCB layout with good analog isolation for the heart-rate front end • Clean breakout for the mic and speaker audio paths • EMI-conscious routing for the high-speed flash bus • Gerber files, drill data, pick-and-place and a curated BOM from mainstream suppliers I will review the design...

I want to automate the filling of an overhead storage tank with a compact microcontroller-based solution. The unit should sense the water level in the tank, trigger the pump when the level drops below a defined threshold, and shut the pump off once the tank is full. I am using a standard overhead tank fed by a single pump from ground level. You’re free to recommend the most reliable sensing method—, or conductive—so long as it performs accurately in typical domestic water conditions and can be serviced easily if something fails. The design must include: • A microcontroller (Arduino, ESP32, or comparable) with clearly commented firmware. • A driver stage capable of switching a 1 HP single-phase pump safely. • Manual override for both pump ON and OFF. ...

I am building a compact embedded solution whose main role is to act as a communication system for live environmental monitoring. The unit must read temperature, humidity, air-quality indices, and soil-moisture levels, then push those readings reliably to a remote endpoint in real time. Here is what I need from you: • Hardware design: sensor selection, schematic, and PCB layout sized for low-power field deployment. • Firmware: driver code for the temperature & humidity, air-quality, and soil-moisture sensors, along with a lightweight stack that formats the data and handles wireless transmission. I have no fixed protocol in mind, so you may propose BLE, LoRa, Wi-Fi, or another option that balances range and power. • Data communication workflow: sample rate configura...

I’m building a small embedded prototype that can recognise a road accident the instant it happens, trigger a buzzer on-board and then text the vehicle’s GPS coordinates to a presaved emergency contact. An accelerometer will be the sole crash-detection sensor, so the firmware has to watch for abnormal spikes on that device, classify them reliably as a collision rather than rough driving, and fire the alert routine. Here is the workflow I have in mind: the microcontroller samples the accelerometer, confirms the threshold breach, sounds the buzzer for nearby help, fetches latitude and longitude from an attached GPS module and immediately sends an SMS through a GSM or LTE-M modem. If the cellular network is down, the code should queue and retry until a signal is regained. What I ...

We are looking for an experienced freelance Embedded Hardware + PCB + Firmware Engineer for an IoT/industrial electronics project. Location: Kolkata preferred Required hands-on experience: • STM32 Nucleo / Discovery boards • Embedded C/C++ and STM32 firmware • UART / USART / RS485 / Modbus RTU • USB-to-RS485 & UART-to-RS485 • GSM / 4G / LTE modules and AT commands • PCB schematic & layout – KiCad / Altium / Eagle / EasyEDA • Component selection & BOM preparation • Power supply and protection circuits • Logic analyzer / oscilloscope / multimeter • PCB bring-up, debugging and hardware testing • Sensor and industrial interface integration • ADC / 4–20mA / 0–2V interfaces Good to have: ESP32, MQTT, Lo...

I need a compact laser-based perimeter protection system for a commercial site that immediately calls a predefined phone number whenever the beam is interrupted. The solution must combine reliable laser detection hardware with a GSM module (SIM800, SIM900 or similar) and the embedded code to place that outbound call within seconds of a breach. The finished unit should be self-contained, run from standard low-voltage DC, and include clear wiring diagrams and firmware source so I can duplicate or service it later. If you can integrate basic tamper detection, weather-proof housings, or an optional battery backup, mention that in your proposal—those extras would be a plus but are not mandatory. To accept the work I will power up the prototype on-site, break the beam and confirm that my...

Embedded SNMPv3 Developer Required – STM32H723 + lwIP I am looking for an experienced embedded developer who has previously implemented SNMPv3 on STM32 or similar microcontrollers using lwIP. I already have basic SNMPv1 GET and TRAP functionality working on an STM32H723-based board. The middleware, BSP, FreeRTOS tasks, and UDP stack are already in place. The task is to extend the existing SNMP agent to support secure SNMPv3 communication. Project Requirements Phase 1: SNMPv3 Communication Implement SNMPv3 GET and TRAP functionality. Enable SHA authentication and AES-128 privacy/encryption using USM. Respond to authenticated and encrypted GET requests. Support GETNEXT, if feasible. Send authenticated and encrypted traps to Bitcom NMS. Ensure a valid, unique SNMP engine ID for the d...

Custom Motherboard with Microchip 48‑pin MCU – 2x 3‑Digit & 1x 7‑Digit Seven‑Segment Displays, Oxygen Sensor, 3x 12V Solenoid Valves, Flowmeter, 2x 5‑Key Touch Keypad, 2x I2C LCDs,2x Water Level Sensor, Thermal Printer, 12V Relay for Motor, air pressure sensor Project Overview I need a custom motherboard (schematic, PCB layout, and firmware) based on a Microchip 48‑pin SMD MCU (TQFP‑48). The board must interface with: . 1x air pressure sensor · 2x 3‑digit seven‑segment displays for Qty · 1x 7‑digit seven‑segment display for amt · Oxygen sensor · 3x 12V solenoid valves – controlled via on‑board MOSFETs · 1x flowmeter – pulse output, interrupt input · 2x 5‑key touch keypad · 2x I2C LCD displays (16×2) · 2x...

I'm seeking an experienced developer to create the FaultLine Meter-Link, a compact industrial electrical measurement accessory. The device will act as a BLE measurement bridge between an existing multimeter and its standard 4 mm safety banana test leads. Key Requirements: - Handle real-time monitoring of voltage, current, and resistance. - Development of a companion app for iOS, Android, or Windows (platform to be confirmed). Ideal Skills and Experience: - Expertise in BLE technology and industrial measurement tools. - Proficiency in cross-platform app development. - Strong background in real-time data processing and display. Prior experience with industrial measurement devices and real-time monitoring applications is highly desirable. Please provide a portfolio showcasing relevant...

I have an STM32F407VET board that will drive a completely stand-alone single-axis solar tracker. The controller must perform three key jobs: • Automatic sun tracking – use only a gyroscope/accelerometer (no light or temperature sensors) to predict the sun vector and move two actuators so the panel stays aligned all day. • Manual control override – via push buttons or simple UART commands I can pause the algorithm and jog each axis, then resume tracking instantly. • Data logging and monitoring – record attitude, motor commands, and health metrics to a micro-SD card while simultaneously streaming the same data over UART for live viewing. I expect clean, non-blocking C firmware that compiles in STM32CubeIDE for the F407VET. HAL drivers are fine; FreeRTOS...

I'm seeking an experienced IoT developer who can create a hardware device with a digital display. The device should operate offline, providing straight output based on programmed inputs. Key Requirements: - Hardware: - Digital display output - Programmed to do calculation. - App: - Display input data and calculations from the hardware - User-friendly interface Ideal Skills: - Experience in IoT hardware development - Proficiency in app development - Strong programming skills - Ability to create offline operating systems Please provide examples of previous work and a brief outline of your approach.

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer