DASH7 is a wireless sensor networking technology using the ISO/IEC 18000-7 standard for active RFID, operating at in the 433 MHz ISM band unlicensed spectrum. DASH7 wireless sensor network provides multi-year battery life, range of up to 10 km (potentially farther), low latency for tracking moving objects, small protocol stack, sensor and security support, and data transfer of up to 200 kbit/s.

DASH7, the low power longest range wireless networking technology was originally created for military use and is now being re-purposed for many commercial applications in place of wireless protocols like ZigBee or IEEE 802.15.4.

DASH7 wireless sensor network utilizes the 433.92 MHz frequency, which is globally available and license-free. 433.92 MHz is ideal for wireless sensor networking applications since it penetrates concrete and water, but also has the ability to transmit/receive over very long ranges without requiring a large power draw on a battery. The low input current of typical tag configurations allows for battery powering on coin cell or thin film batteries for up to 10 years.

Unlike most active RFID technologies, DASH7 wireless sensor network supports tag-to-tag communications which, combined with the long range and signal propagation benefits of 433 MHz, makes it an easy substitute for most wireless “mesh” sensor networking technologies. DASH7 wireless sensor network also supports data encryption/decryption, IPv6, and other features.

DASH7 data transfer is abrupt and does not include content such as video, audio, or other isochronous forms of data. For most applications, packet sizes are limited to 256 bytes. Transmission of multiple, consecutive packets may occur but is generally avoided if possible. DASH7’s main method of communication is by command-response, which by design requires no periodic network “hand-shaking” or synchronization between devices. A DASH7 system of devices is inherently mobile or transitional. Unlike other wireless technologies DASH7 is upload-centric, not download-centric, so devices do not have to be managed extensively by fixed infrastructure (i.e. base stations).