#Yarm 

<abstract>
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.
</abstract>

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:

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

<img src="./yarm-dev-yarm.jpg">

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##YARM-DEV features

* YARM module on-board
* <b>Size</b>: 42x23 mm 
* <b>Power supply</b>: 5 Volt DC via microUSB 
* <b>Temperature range</b>: -40&deg;C to +85&deg;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))
* [Declarations of conformity](/declarations)

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##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
* <b>RF band</b>: Free ISM 868 MHz
* <b>RF range</b>: Up to 10 Km in free space and tens of meters in buildings
* <b>RF bit rate</b>: Up to 10 kb/s
* <b>Size</b>: 22x14 mm 
* <b>Power supply range</b>: 2.2 to 3.6 Volt DC 
* <b>Temperature range</b>: -40&deg;C to +85&deg;C
* Connection for external antenna (uFL 2mm)
* No Acme Systems brands on PCB
* SMT product
* [Declarations of conformity](/declarations)



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### 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)

@include='adv_yarm'