Just after Haystack Technologies unveiled its rather cool new LPWAN equipment, and promptly selling out of the developer kits, Amazon teased the community with what could be a seismic announcement – Amazon Sidewalk. Details are scant, but a 900 MHz mesh protocol with a range of 500 to 1,000 meters has excellent application in Amazon’s smart home footprint. Haystack can trace its origins back to wireless supply chain visibility technologies in Savi Technology, a firm that was acquired by Lockheed Martin in 2006 and then spun back out in 2012. Haystack was founded in 2010 by Patrick Burns and J.P. Norair, and created the DASH7 protocol to focus on low-power wireless applications in wide-area networks. The DASH7 Alliance was founded…