How far a wireless signal can travel and how well it can negotiate obstacles in its path is critical to evaluating “Internet of Things” technologies
DASH7 typically uses the globally available 433 MHz frequency and can achieve outdoor ranges of between 200 meters and 2 kilometers or more, depending on location. DASH7 has excellent in-building signal propagation that allows it to penetrate walls, bend around HVAC ducts, and more, unlike competing technologies. Using other sub-1GHz frequencies with more liberal power and duty cycle allowances (e.g. LoRa), DASH7-based devices can communicate over many miles.
Most WiFi systems have indoor range of 30 meters and 90 meters outdoors. WiFi uses the 2.45 and 5 GHz frequency bands and suffers from poor performance around walls, HVAC ducts, and other objects that DASH7 penetrates easily.
Bluetooth was designed to replace RS-232 cables and as a result, it is designed for very short range use. Like WiFi, it operates at the 2.45 GHz band and performs poorly around walls, metal objects, or anything wet or made of water.
Haystack Technologies, Inc.
210 S Ellsworth Ave
San Mateo, CA 94401