Silicon Labs Whitepaper

"$6 TRILLION will be spent on IoT solutions over the next 5 years."

Business Insider, July 2016

Wireless Modules

Lexi currently has two wireless modules available-Bluetooth Low Energy Mesh (BLe Mesh) & 900MHz Radio

BLe Mesh CORE Wireless Module

The Lexi BLe Mesh BASE Module provides all of the key features required to make a device or driver Lexi enabled in a small modular package for easy integration.

The BASE comes with an approved Bluetooth Mesh module with baked in Lexi Firmware. Due to its very small size, this PCBA can be easily integrated into a bulb or light of nearly any proportions, including GU10s and MR16s. The Lexi Firmware can control all light types including RGB+CCT, CCT Only and/or Dimmable only.

Additionally the use of standard interfaces allows for future extensions and other applications. The BASE module can either be soldered flat onto a parent or daughter board if all interfaces are required or if only the primary smart lighting interfaces are needed it can be soldered vertically in a slot prepared in the base board providing a compact and easy to integrate solution.

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Features

Fully compatible with Lexi Platform, Lexi Marketplace, Cloud APP, Reporting & Analytics Communication

  • Bluetooth® v4.1 specification compliant
  • Bluetooth Mesh
  • 128KB memory: 64KB RAM and 64KB ROM
  • Support for Bluetooth v4.1 specification host stack including ATT, GATT, SMP, L2CAP, GAP
  • 32kHz and 16MHz crystal or system clock
  • UART
  • Secure architecture (each core is encrypted and carries a unique identification code)

Technical summary

Physical Characteristics

  • Dimensions: 12 x 13 x 3.5mm

Environmental Requirements

  • Ambient Temperature -40°C to +85°C

Interfaces Physical (wired)

  • Power (3.3V nominal)
  • <900nA current consumption in dormant mode

900MHz Wireless Module

The Lexi 900MHz Radio Wireless Module combines a flexible, very low power RF transceiver with a powerful 48-MHz Cortex®-M3 microcontroller in a platform supporting multiple physical layers and RF standards. A dedicated Radio Controller (Cortex®-M0) handles low-level RF protocol commands that are stored in ROM or RAM, thus ensuring ultra-low power and flexibility.

The low-power consumption of the 900MHz Wireless Module does not come at the expense of RF performance; the 900MHz Wireless Module has excellent sensitivity and robustness (selectivity and blocking) performance.

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Features

Fully compatible with Lexi Platform, Lexi Marketplace, Cloud APP, Reporting & Analytics Communication

  • Powerful ARM® Cortex®-M3 Processor
  • 48-MHz Clock Speed
  • 128KB of In-System Programmable Flash
  • 8KB of SRAM for Cache
  • 20KB of Ultra-Low-Leakage SRAM
  • 16-Bit Architecture
  • 2KB of Ultra-Low-Leakage SRAM for Code and Data
  • 200 kpb/sec data rate
  • Supports Over-the-Air (OTA) Update

Technical summary

Physical Characteristics

  • Dimensions: 12 x 13 x 3.5mm

Environmental Requirements

  • Ambient Temperature -40°C to +85°C

Power

  • Wide Supply Voltage Range: 1.8 to 3.8 V
  • RX: 5.4 mA
  • TX at +10 dBm: 13.4 mA
  • Standby: 0.7 µA

Power

  • Excellent Receiver Sensitivity –110 dBm at 50 kbps
  • Excellent Selectivity (±100 kHz): 56 dB
  • Excellent Blocking Performance (±10 MHz): 90 dB