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I will do embedded firmware, stm32, esp32, nrf52
Hardware Engineer, PCB Design, Embedded Firmware and IoT Products
I design electronics that actually ship. 25+ products in market, ETL and CE certified boards selling worldwide, and a Kickstarter product that raised $49k and went into a 1,800 unit production run.
F...
About this Gig
Most firmware jobs do not fail on features. They fail on the things nobody measured. Sleep current five times over budget. A radio that drops under load. An OTA update that bricks a unit in the field.
I write firmware for products that ship. SwellFrame is an ESP32 e-paper display that raised $60k on Kickstarter, is in a 5,000 unit run, and passed FCC, CE and EMC. I cut its sleep floor from 150 uA to a 20 uA budget for a 12 month battery target.
What I work with
ESP32 with ESP-IDF, STM32 with CubeIDE, nRF52 and nRF91
BLE, BLE Mesh, WiFi, LoRa, LoRaWAN, LTE, UWB
Sensor drivers over I2C, SPI, UART, RS485, Modbus
Deep sleep and battery life optimization, verified on a power profiler
OTA with dual partition and rollback
MQTT, AWS, ThingsBoard
What you get
Full firmware source, commented and buildable
Build and flash instructions
Measured results, not estimates
Message me with your MCU, your radio, and what the device has to do. I will tell you honestly if it is a fit.
My Portfolio
Other Electronics Engineering Services I Offer
FAQ
Do I need a finished PCB before you start?
No. I can write firmware against a dev board or an evaluation kit while your hardware is still in layout. If the board is not built yet, tell me and I will work on a matching devkit so the port is short.
Can you do the hardware too?
Yes. I design PCBs and write firmware as one package, which is usually cheaper and faster than splitting it across two people. Message me if you want both and I will scope it as one job.
Will you tell me my battery life, or just estimate it?
I measure it. Sleep and active current get profiled on real hardware and you get the numbers, not a spreadsheet guess. Most sleep current problems are a pullup left enabled, a regulator with high quiescent, or a floating input on a sleeping IC, and none of those show up in simulation.
