Product description

Yarm is a smart and cost effective solution for system integrators to build their own RF applications at 868 MHz avoiding all the hardware design costs requested to start a new custom RF project.

Yarm integrates:

  • a low power MCU (35 µA/MHz in active mode and 200nA in sleep mode) that is fully available for the user code
  • an high sensitivity transceiver.

Yarm is provided without any firmware inside but a lot of source code examples are available to start to develop your own solution.

Two form factors are available:

  • YARM-DEV which is a 42x23 mm module easier to manage to make prototypes and low volume products
  • YARM which is a 22x14 mm SMT module tailored to be integrated in your mass production applications

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YARM-DEV features

  • YARM module on-board
  • Size: 42x23 mm
  • Power supply: 5 Volt DC via microUSB
  • Temperature range: -40°C to +85°C
  • Connection for external antenna (uFL 2mm)
  • No Acme Systems brands on PCB
  • In-circuit programmer connector
  • MicroUSB for power and data
  • 14+14 pitch 2.54mm pads for pin strip with GPIO, BUS, PWM, ADC, etc. (pinout)

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YARM features

  • Low power Atmel SAML21 MCU (ARM Cortex M0+ @ 48MHz) fully available for the customer applications.
  • Atmel ATA8510 Monolithic RF Transceiver IC for Sub-1GHz smart RF applications
  • Compatible with Atmel Studio 7, the free of charge Integrated Development Environment (IDE) that integrates the Atmel Software Framework (ASF), a large library of free source code with 1,600 project examples.
  • RF band: Free ISM 868 MHz
  • RF range: Up to 10 Km in free space and tens of meters in buildings
  • RF bit rate: Up to 10 kb/s
  • Size: 22x14 mm
  • Power supply range: 2.2 to 3.6 Volt DC
  • Temperature range: -40°C to +85°C
  • Connection for external antenna (uFL 2mm)
  • No Acme Systems brands on PCB
  • SMT product

Atmel SAM L21E18B MCU features

This is the main MPU fully available for the user application code.

  • Low power Atmel SAML21 MCU
  • ARM Cortex M0+ @ 48MHz
  • 256KByte of flash memory
  • 32KByte of RAM
  • 8KByte of low power RAM
  • Consumption down to 35 µA/MHz in active mode and 200nA in Sleep mode
  • Full Speed USB host and device
  • AES encryption engine
  • DMA, Sleepwalking and Event system
  • Datasheet

Atmel ATA8510 Tranceiver features

This is the transceiver AVR chip NOT AVAILABLE for the user application code. It works with a royalty free binary firmware. If you need to customize the code on this chip please contact directly the Microchip/Atmel.

  • Atmel ATA8510 Monolithic RF Transceiver IC for Sub-1GHz smart RF applications
  • High sensitivity at -123dBm
  • High output power of -12dBm to +14.5dBm programmable in 0.4-dB steps
  • SPI line bus to comunicate with SAM L21
  • Datasheet

Software environment

Yarm and Yarm-dev are compatible with Atmel Studio 7 a free-of-charge Integrated Development Environment provided by Microchip/Atmel.

Atmel Studio 7 requires a modern Windows PC to run, is free (but not open source) and includes a lot of royalty free libraries and about 1,600 project examples.

A set of specific open source libraries are available on Cledic's Yarm libraries GitHub repository.