Bluetooth de baja energía Jobs

Estoy desarrollando un prototipo IoT de bajo consumo para un vertedor inteligente de bebidas y busco un ingeniero embedded/freelance con experiencia práctica en Nordic Semiconductor nRF52 y Bluetooth Low Energy. El objetivo del prototipo es detectar cada servido de una botella mediante un reed switch activado por un imán colocado en la tapita abatible del vertedor. Cada vez que el reed switch se active, el microcontrolador debe enviar automáticamente un evento BLE con un ID único del vertedor hacia un dongle nRF52840 PCA10059 conectado a una computadora, que funcionará como hub/receptor. No busco una empresa grande ni una solución sobredimensionada. Busco un especialista técnico que pueda llevar el prototipo a una prueba funcional, documen...

I have an existing Voice AI application built with LiveKit and Azure AI that is already fully functional. I'm looking for an experienced developer to make a few improvements before deployment. This is a small project that should take approximately 2–3 hours and needs to be completed within 24 hours. Tasks Reduce AI response latency to create a faster, more natural conversation. Rewrite the prompts so the assistant gives short, direct answers instead of long responses. Fix the call flow so the AI doesn't end outbound calls before the customer has clearly confirmed. Add proper call-ending logic for inbound calls when the conversation has naturally finished. Requirements Proven experience with the LiveKit Python SDK. Experience working with Azure OpenAI and Azure Speech Serv...

We are seeking experienced Hardware Development Engineers with a minimum of 5 years of experience to lead the end-to-end development of a consumer-grade embedded IoT system. This is a collaborative project requiring close coordination between hardware and firmware teams to deliver a production-ready industrial IoT device with advanced wireless capabilities and sensor integration. HARDWARE DEVELOPMENT ENGINEER Key Responsibilities: - System-level hardware architecture and design freeze - Component selection (MCU/SoC, power ICs, storage interfaces, wireless modules) - Schematic design and PCB layout (high-speed + mixed-signal, EMI-aware) - Power integrity, grounding, shielding, and DFM/DFA compliance - Prototype fabrication support and manufacturer Q&A - Hardware bring-up support and va...

We have an Android app (TC58) that prints ShipStation shipping labels (4x6 PDF) to a Zebra mobile printer over Bluetooth. We need a definitive fix for unreliable PDF Direct printing and a robust default path that works across power cycles and app sessions. Current setup Device: Zebra TC58 (Android handheld) Printer: Zebra mobile thermal printer (Link‑OS 6.x) over BLE Labels: ShipStation 4" x 6" PDFs (~63 KB) SDK: Zebra Link‑OS Android SDK (Bluetooth + FileUtil/sendFileContents) What we’ve tried and observed We toggle (PDF Direct) per print: set to pdf before print, none after. This is wrong per Zebra docs; only applies after a printer restart. After the first successful label, subsequent prints often fail silently (no label) or “corrupt” printer state ...

Hardware Engineer Wanted: Compact Biometric Wearable Prototype We are seeking a hardware engineer to design the electronics for a lightweight, clip-on attachment that tracks head posture, motion, and heart rate metrics. Project Overview You will design the complete electronic architecture and schematics for a compact, battery-powered wearable prototype. Key Features: Sensors: Integration of an EOG and IOG Connectivity: Bluetooth Low Energy (BLE) for data transmission. Power: Low-power optimization with a small LiPo battery and a magnetic charging setup. Form Factor: High-density, tight-space layout (experience with small or rigid-flex PCBs is a major plus). What You’ll Do Select optimal components based on power and size constraints. Design the analog front-end for clean sens...

We are seeking an experienced RF Engineer with strong expertise in Bluetooth Low Energy (BLE) antenna design, RF matching networks, and wireless product validation. The ideal candidate will diagnose performance issues, redesign the antenna and matching network as needed, and validate the final design to ensure robust BLE performance. Project Scope - Evaluate the current BLE RF and antenna design. - Diagnose issues affecting BLE range, RSSI, connection reliability, and overall RF performance. - Analyze the PCB layout, antenna placement, ground plane, enclosure effects, and surrounding components. - Redesign or optimize the BLE antenna and matching network to improve performance. - Perform impedance matching using a VNA and optimize the antenna for the target operating environment. - Valid...