MySensors is a

free and open source Free and open-source software (FOSS) is a term used to refer to groups of software consisting of both free software and open-source software where anyone is freely licensed to use, copy, study, and change the software in any way, and the source ...

DIY ( do-it yourself) software framework for

wireless Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most ...

IoT (

Internet of Things The Internet of things (IoT) describes physical objects (or groups of such objects) with sensors, processing ability, software and other technologies that connect and exchange data with other devices and systems over the Internet or other comm ...

) devices allowing devices to communicate using

radio transmitters In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the ...

. The library was originally developed for the

Arduino Arduino () is an open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices. Its hardware products are licensed unde ...

platform. The MySensors devices create a virtual radio network of nodes that automatically forms a self healing mesh like structure. Each node can relay messages for other nodes to cover greater distances using simple short range transceivers. Each node can have several sensors or actuators attached and can interact with other nodes in the network. The radio network can consist of up to 254 nodes where one node can act as a gateway to the internet or a home automation controller. The controller adds functionality to the radio network such as id assignment and time awareness.

Supported hardware platforms

The framework can natively be run on the following platforms and micro controllers. *

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

Raspberry Pi Raspberry Pi () is a series of small single-board computers (SBCs) developed in the United Kingdom by the Raspberry Pi Foundation in association with Broadcom. The Raspberry Pi project originally leaned towards the promotion of teaching basic ...

* ATMega 328P *

ESP8266 The ESP8266 is a low-cost Wi-Fi microchip, with built-in TCP/IP stack, TCP/IP networking software, and microcontroller capability, produced by Espressif Systems in Shanghai, China. The chip was popularized in the English-speaking maker culture ...

ESP32 ESP32 is a series of low-cost, low-power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations, Xtensa L ...

* ARM Cortex M0 (mainly Atmel SAMD core as used in Arduino Zero)

Communication options

MySensors supports wireless communication using the following transceivers: * NRF24L01 * RFM69 * RFM95 (

LoRa Lora is a female given name and family name in the Spanish language of French origin meaning from Lorraine, a region in Northeastern France. As a given name, Lora may also be a variant of Laura or derived from an Italian hypocoristic of either E ...

) * WiFi (ESP8266 & ESP32) Wired communication over: *

MQTT MQTT (originally an initialism of MQ Telemetry Transport) is a lightweight, publish-subscribe, machine to machine network protocol for Message queue/Message queuing service. It is designed for connections with remote locations that have devices ...

* Serial USB *

RS485 RS-485, also known as TIA-485(-A) or EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems are supported. The s ...

Security

The wireless communication can be signed using truncated

HMAC-SHA256 In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret ...

either through hardware wit
AtmelATSHA204A
or compatible software emulation and optionally encrypted. The implementation is timing neutral with whitened random numbers, attack detection-and-lockout and protects against timing attacks,

replay attacks A replay attack (also known as a repeat attack or playback attack) is a form of network attack in which valid data transmission is maliciously or fraudulently repeated or delayed. This is carried out either by the originator or by an adversary wh ...

and man in the middle attacks.

Over the air firmware updates

The

firmware In computing, firmware is a specific class of computer software that provides the low-level control for a device's specific hardware. Firmware, such as the BIOS of a personal computer, may contain basic functions of a device, and may provide h ...

of a MySensor node can be updated over the air using a few different bootloader options: * In place overwriting of flash memory using MySensorsBootloaderRF24. * Using external flash with the DualOptiBoot. * For ESP8266 nodes using the built in OTA feature.

References

External links