##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
Buy ##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](/pinout_yarm))
Buy ##YARM features * Low power [Microchip SAML21 MCU](http://www.microchip.com/design-centers/32-bit/sam-32-bit-mcus/sam-l-mcus) (ARM Cortex M0+ @ 48MHz) fully available for the customer applications. * [Microchip ATA8510](http://www.microchip.com/wwwproducts/en/ATA8510) Monolithic RF Transceiver IC for Sub-1GHz smart RF applications * Compatible with [Atmel Studio 7](http://www.microchip.com/avr-support/atmel-studio-7), the free of charge Integrated Development Environment (IDE) that integrates the Microchip Advanced 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
### Microchip SAM L21E18B MCU features This is the main MPU fully available for the user application code. * Low power [Microchip SAML21 MCU](http://www.microchip.com/design-centers/32-bit/sam-32-bit-mcus/sam-l-mcus) * 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](http://www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en590687) ### Microchip ATA8510 Tranceiver features * [Microchip ATA8510](http://www.microchip.com/wwwproducts/en/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](http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-9315-Smart-RF-ATA8510-ATA8515_Datasheet.pdf) ## Software environment Yarm and Yarm-dev are compatible with [Atmel Studio 7](http://www.microchip.com/avr-support/atmel-studio-7) a free-of-charge Integrated Development Environment provided by [Microchip](http://www.microchip.com).
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](https://github.com/cledic/YARM). * [Getting Started with Yarm-dev and Atmel Studio 7](/yarm_getting_started)