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I have sketched out Vaami—an elegant, pocket-sized gadget that lets people exchange full voice and text messages anywhere, even across countries, without a smartphone. My role will be to steer the vision, user experience, and overall look; I need an electronics engineer who can turn the concept into a working prototype. You’ll be focusing on the core electronics and firmware. Because your background is in electronics engineering and you’re most comfortable with wireless communication modules, I’d like you to specify the PCB, select components, and code the stack around a low-power microcontroller. For long-range, low-cost connectivity I’m leaning on LoRa, so experience with Semtech SX127x/SX126x-class radios, LoRaWAN or custom LoRa mesh, and the associated RF layout practices is essential. Key goals • Impeccable reliability—messages must never be lost, even when links drop. • Voice as well as text, so an efficient audio codec, buffering, and storage scheme are required. • A clean, simple UI: tactile buttons and a modest e-ink or OLED display that anyone can navigate. • Portability and style: compact board, lithium-ion battery management, and thoughtful power budgeting to hit several days of mixed use. Deliverables 1. Schematics and PCB gerbers ready for fabrication 2. Fully commented firmware implementing LoRa messaging, store-and-forward reliability, and basic UI flow 3. BOM with sources, power consumption estimates, and suggested enclosures 4. One assembled, tested prototype with demo of voice + text exchange I will supply all industrial design sketches and be available daily for iterative feedback. If you’re excited to build something that can keep people connected when phones fail, let’s discuss timelines and any additional resources you’ll need.
Projektin tunnus (ID): 40335760
7 ehdotukset
Etäprojekti
Aktiivinen 16 päivää sitten
Aseta budjettisi ja aikataulu
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Rekisteröinti ja töihin tarjoaminen on ilmaista
7 freelancerit tarjoavat keskimäärin ₹23 643 INR tätä projektia

I am a skilled and reliable Embedded Systems Engineer with over 6 years of hands-on experience in Arduino, ESP32/ESP8266, and microcontroller-based development. I specialize in designing efficient, stable, and scalable embedded solutions, turning ideas into fully functional hardware-software systems. I have a strong background in electronics, sensors, communication protocols (UART, I2C, SPI, MQTT, WiFi, BLE), and real-time embedded systems. My development approach focuses on clean, well-structured, and well-documented firmware, ensuring long-term reliability and easy maintenance. I also provide thorough testing, debugging, and performance optimization, including power efficiency improvements where required. I am a detail-oriented engineer with strong problem-solving skills and extensive experience in hardware debugging and firmware optimization. Beyond technical expertise, I value clear communication, meeting deadlines, and maintaining high client satisfaction. I work closely with clients to fully understand project requirements and deliver high-quality results. Pricing is flexible and can be discussed based on project scope and complexity. I am open to both short-term and long-term projects. Let’s work together to build a professional, reliable, and efficient embedded system for your needs.
₹35 000 INR 7 päivässä
7,4
7,4

Hi, I can help you develop your LoRa-based communication device with a complete approach—from firmware development to PCB design. I have strong hands-on experience working with embedded systems, wireless communication (including LoRa), and custom hardware design. I focus on building reliable, efficient, and production-ready solutions. I can support you with: • Firmware development for microcontrollers • LoRa communication integration and optimization • Custom PCB design and hardware development • Testing and debugging for stable performance I’m confident I can deliver a clean and working solution based on your requirements. Let’s discuss your project in detail. Thanks
₹13 000 INR 5 päivässä
3,1
3,1

Hi, I can develop a complete LoRa-based communication device (VaAmi) capable of reliable text and voice messaging without the need for smartphones or internet. I have experience in embedded systems, LoRa communication, and low-power device design. I will design a compact PCB using a low-power microcontroller and SX127x/SX126x LoRa module, implement store-and-forward messaging for reliability, and develop firmware for voice (audio codec + buffering) and text communication with a simple button-based UI. Scope: *Schematic and PCB design (compact, low-power) *LoRa communication (LoRaWAN or custom mesh) *Firmware development (text + voice messaging) *Audio handling (encoding, storage, playback) *UI (buttons + OLED/E-ink display) *Battery management (Li-ion + power optimization) Deliverables: *Schematic, PCB, Gerber files *Firmware source code (well-commented) *BOM with components and power estimates *One working prototype (voice + text demo) *Basic documentation Approach: *Select efficient MCU and LoRa module for long-range communication *Implement reliable messaging with buffering and retransmission *Optimize audio compression for low data rate LoRa *Design low-power system for multi-day battery life *Ensure simple and user-friendly interface I will deliver a reliable, compact, and scalable communication device suitable for real-world use.
₹30 000 INR 20 päivässä
2,0
2,0

Hi there, as an Electronics Engineer with specialized expertise in LoRa communication and embedded systems, I am perfectly positioned to turn your Vaami concept into a high-reliability prototype. I have a dedicated team proficient in RF layout practices and low-power microcontroller optimization, having previously developed complex communication models including AI-driven protection systems and high-frequency bidirectional power stages. For Vaami, I will implement a robust Semtech SX126x-class radio architecture with a custom store-and-forward mesh protocol to ensure no message is lost during link drops. My expertise in digital signal processing allows me to integrate efficient audio codecs for clear voice messaging, while managing a compact Li-ion power budget to achieve your target of several days of use. I will deliver production-ready Altium/KiCad Gerbers, fully commented firmware for the UI and LoRa stack, a detailed BOM, and a fully tested prototype demonstrating seamless voice and text exchange. We specialize in "humanized" technical documentation and iterative development, ensuring the final hardware perfectly aligns with your industrial design vision.
₹12 500 INR 7 päivässä
0,0
0,0

Hi, Vaami sounds like a compelling and meaningful product—especially the focus on resilient, phone-free communication. My background in embedded systems and RF design aligns well with what you’re looking for. I’ve worked with low-power MCUs and LoRa (including SX127x/SX126x-class radios), and I’m comfortable handling the full stack—from schematic/PCB design and RF layout to firmware for reliable messaging systems. Your requirements around reliability and store-and-forward messaging are particularly interesting. I’d approach this with a robust queuing + acknowledgment system, persistent storage, and retry logic to ensure messages aren’t lost even with intermittent links. For voice, we can explore efficient codecs (e.g., ADPCM/Opus-lite depending on constraints) along with buffering and compression strategies to fit LoRa bandwidth limits. A couple of quick points to clarify: Are you targeting LoRaWAN infrastructure, or a fully custom peer-to-peer / mesh network? Do you have a rough target for message latency and voice clip duration? Any constraints on enclosure size or battery capacity yet? I can take ownership of the electronics, firmware, and prototype bring-up, and collaborate closely with your design vision. Happy to discuss timelines and next steps.
₹25 000 INR 7 päivässä
0,0
0,0

Bhopal, India
Liittynyt maalisk. 30, 2026
$750-1500 USD
£20-250 GBP
$30-250 USD
$15-25 USD/ tunnissa
$30-250 USD
$30-250 SGD
$10-30 USD
$750-1500 USD
$1500-3000 USD
₹100-400 INR/ tunnissa
min $50 USD/ tunnissa
$250-750 USD
$250-750 USD
$30-250 USD
$25-50 USD/ tunnissa
₹1500-12500 INR
₹600-1500 INR
₹600-1500 INR
₹12500-37500 INR
$30-250 NZD