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  • High Range (up to 120m)
  • Simultaneous master and slave operation
  • Built-in antenna 
  • 1.8-3.6V operating voltage  
  • 256kB Flash / 32kB RAM (H51)
  • 512kB Flash / 64kB RAM (H52)
  • Integrated 16MHz Clocks
  • Temperature range of -30°C to +85°C
  • 17mm X 20mm X 3mm
  • 26 GPIOS which can be configured to multiple UART, SPI, I2C, Analog Inputs & 4 PWM channels
  • FCC/IC, CE and BT SIG
  • BT 5.0 Ready (H52)


Key Features:

Key Features

Long Range connectivity up to 120 meters

The MeshTek H51 High Power Module includes an integrated antennae and power amplifier that extends the open air range of the module up to 120 meters (+390 feet).  Each module can be meshed with another up to 12 hops, enabling much larger spaces and distances to be covered compared to traditional Bluetooth devices.  With the meshing enabled, you can send messages over 1Km by meshing the devices together over multiple hops.

FCC/IC, CE and BT SIG Certified

Bring your products to market quickly by leveraging the key market certifications needed and avoid losing time and money in the certification process.   The MeshTek H51 module has the key certifications you need, and can be upgraded to accommodate new standards and software to keep your devices competitive.

Real Time Clock

Each MeshTek H51 High Power Module features a real time clock for built in automation capacity.   Schedule your devices to turn on and off at specific times, as well as change functions.   

256kB Flash / 32kB RAM

With a large 256K flash and 32kB RAM memory, the MeshTek H51 modules has more than enough memory to store code, meshing instructions, and cloud connectivity applications needed for IoT devices.

26 Unique GPIO’s

Each MeshTek H51 module includes 26 GPIO’s that can be configured as a UART, SPI, I2C, or  Analog Inputs.  In addition the module will also support 4 PWM channels for smart lighting and other LED applications.

Simple integration using ilumi Solutions Development Kit

Design, configure, and test your Bluetooth mesh product features faster than ever using the ilumi Solutions Development Kit (Link) and mini board (sold separately).  This kit enables you to test with multiple power supplies, such as USB and Battery, as well as easy connections to programmer boards and other devices.  These kits come with sample iOS and Android API software.





Simple, Flexible, & Reliable Connectivity with Bluetooth® Smart

ilumi MeshTek™

CSRmesh™ Module

Chip Set

Nordic nRF51822 and nRF52832 chipset



Connection + Broadcast


Flash / RAM

256kB / 32 kB and 512kB / 64 kB

Up to 64kB / 64kB

Mesh Data Size Support

Large size & high rates (Programs, schedules,  & themes)

Limited size & rate

Mesh Data Transfer Reliability



Firmware Update

Over the Air Update & auto-network propagation

Over the Air Update

Simultaneous Broadcast and Connection Based Meshing






Module to module open air range

Up to 400 feet

Up to 100 feet, standard

Proximity support



Built-in 0 to 10 V controller option



Built-in PWM switch controller option



Download Data Sheet for more information

Note: The comparison table is based on the best knowledge of the market data available as of 03/2016.