Pavel stessin - building and selecting hardware for connected devices
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In this talk, we will show the building blocks of connected products, we will discuss the various considerations for selecting the hardware and components. Deeper examples of BLE products will be given.
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Pavel stessin - building and selecting hardware for connected devices
- 1. Building and Selecting Hardware for Connected Devices Pavel Stessin : Pavel.Stessin@gmail.com
- 2. Connected product Product Stuff Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Water sensor Valve etc What are the building blocks of a connected product?
- 3. Connected product ProcessorProduct Stuff Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Water sensor
- 4. Connected product Communication logicProcessorProduct Stuff Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Water sensor
- 5. Connected product ProcessorProduct Stuff High-Level Communication Stack Low-Level Communication Layer “Antenna Brain” Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Water sensor
- 6. Selecting components beautiful screen Large Processor “Application Processor” + Linux Product Stuff Linux Stack and device drivers Low-Level Communication Layer “Antenna Brain” Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Full day battery!
- 7. Selecting components beautiful screen Large Processor “Application Processor” + Linux Product Stuff Linux Stack and device drivers Low-Level Communication Layer “Antenna Brain” Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer Full day battery! $50 $30 $8 $10 Total BOM: $100 For very high quantities…
- 8. Selecting components usable screen Tiny Processor System-On-Chip (SoC) “Microcontroller” Product Stuff Linux Stack and device drivers Low-Level Communication Layer “Antenna Brain” Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer 6 month battery
- 9. Selecting components usable screen Tiny Processor System-On-Chip (SoC) “Microcontroller” Product Stuff High-Level Communication Stack Low-Level Communication Layer “Antenna Brain” Antenna Screen Leds Buttons Motion sensor Vibrate Buzzer 6 month battery $2 Total BOM: $5 For very high quantities… $1 $1.5
- 10. Selecting components LEDs rock Tiny Processor System-On-Chip (SoC) “Microcontroller” Product Stuff High-Level Communication Stack Low-Level Communication Layer “Antenna Brain” Antenna $1 Total BOM: $2.5 For very high quantities… $1 $0.3 Leds Buttons Motion sensor 2 years battery
- 12. Application processor class SOM (System-On-Module) based Chip Based <10K>10KGood for quantities (estimated) LargerMediumProduct size LowHighHW Development effort LowHighSW Development effort $60$20Cost
- 13. Microcontroller class Module basedChip Based <50K>50KGood for quantities (estimated) Very smallExtremely MiniatureProduct size LowHigherHW Development effort Low / MediumMediumSW Development effort $3.5$1.5Cost
- 14. Let’s assume we want to build a ble device Beacon What would be the requirements for chip selection?
- 15. Factors for BLE chip selection MeaningFactor Allows saving BOM cost at expense of power consumption. Good quality or calibrations allow less power consumption compromises. Has internal RO(Ring Oscillator)? Good one? Smallest as better, or improved manufacturability and yield, or better support for different PCB technologies, or compatibility with more manufacturers. Available packages and sizes Must consider specific features requirements. Newer is not necessarily better per case, and stated standard per chip doesn’t require implementation of features. Bluetooth Standard and features Dictated by required external sensors/activators/UI. How much power does it take to support those peripherals? Supported Peripherals and pins count Can it work directly from our battery and till how low? Might require additional BOM cost for special circuitry. Voltage range Many sub-factors – in advertising (and which), in connection (and which), processing, advertising transitions, idle, etc. Power consumption These are some examples, we won’t go over all of them here…
- 16. Factors for BLE chip selection MeaningFactor Affects range – independently for advertising only, advertise+connection, and scanner only. Also affects power consumption and security. TX power and RX sensitivity Remaining place for code (depending on stack size). Affects possibility and mode of FOTA (Over the air updates). Flash Depending on specific code architecture.RAM If needed to make local processing, like sensor fusion.Processing capability Price… And more…
- 17. Thank you!
Hinweis der Redaktion
- כשבאים לתכנן מוצר מחובר, חשוב לבחור את אופן החיבור, אבל לא רק בגלל השם. בחירה נכונה של אופן החיבור תשפיע באופן ישיר על חווית השימוש והערך למשתמש ומכאן על יכולת המכירה וההתאמה לשוק. והשפעה השנייה החשובה זה על התחום העסקי – של עלות הבאת המוצר לשוק, העלות לצרכן ליצירת כדאיות קנייה, ומכאן הרווחיות של הפרוייקט כולו. כמובן בלתי אפשרי ללמד את התהליך הנכון, אבל ננסה לתת כאן מספר כלים לעזור בתהליך.