$23 Sonoff 4CH Pro 4-Channels WiFi & RF Switch Ships in a DIN Rail Enclosure

ITEAD Studio’s Sonoff family is a collection of really useful and inexpensive home automation devices which have been featured multiple times on CNX Software with either to stock firmware and eWelink app, or open source firmware developed by the community. I’m using a Sonoff TH16 to control a water pump, a Sonoff Pow to monitor my office’s power consumption, and Karl used some Sonoff switches to control his lights at home. The company has now launched Sonoff 4CH Pro with 4 relays that can be controlled with buttons on the unit, WiFi, or RF remote controls, and comes in a DIN Rail enclosure. Sonoff 4CH Pro switch specifications: Connectivity – ESP8266 WiFi module and 433 MHz receiver Relays – 4x HUIKE 230V/10A relays (max 2200W per relays) with NC and NO connection Configuration –  K5 & S6 switch for mode selection; K6 switch for time selection (0.5 to 4s) Misc – 4x user button to turn on/off the relays, 4x …

Support CNX Software – Donate via PayPal, become a Patron on Patreon, or buy review samples

OpenThread is an Open Source Implementation of Thread IoT Networking Protocol

Thread was announced about two years ago, as a new IP-based wireless protocol based on 6LoWPAN and 802.15.4 standards and targeting IoT applications. Nest Labs,  an Alphabet company, has now released OpenThread open source implementation of the networking protocol under a BSD license. The source code (C++)  includes supports for End Device, Router, Leader & Border Router roles, and  can be found on Github. The implementation is said to be OS and platform agnostic with a radio abstraction layer, have a small footprint, and implement all Thread networking layers, namely IPv6, 6LoWPAN, IEEE 802.15.4 with MAC security, Mesh Link Establishment, and Mesh Routing. To quickly get started you can may to read the Examples README which explains how to build the code, start two nodes, and ping them. Interestingly, while the code is there for everybody to use, only paid members ($2,500 to $100,00) of the Thread group can access the full specifications. Thanks to Nanik for the tip. Jean-Luc …

Support CNX Software – Donate via PayPal, become a Patron on Patreon, or buy review samples

Thread is a New IP-based Wireless Protocol Leveraging 6LoWPAN and 802.15.4 Standards

Wi-Fi is a neat way to connect devices to Internet, but it has two main inconveniences: relatively high cost and power consumption. Luckily there are standards that addresses the cost and power consumption issues. Radio chips based on IEEE 802.15.4, a standard which specifies the physical layer and media access control for low-rate wireless personal area networks, are common place and found in many existing devices relying on higher level wireless protocols such as ZigBee, ISA100.11a, WirelessHART, and MiWi. AFAIK, Zigbee is the most popular of the aforementioned protocols, but is hindered by the requirements of the license for commercial products (annual fee), Zigbee membership requirements conflict with many open source license such as GPL, and the standard suffers from lack of interoperability and IPv6 support, and power requirements that are too high for some applications. So a consortium of seven companies namely ARM, Big Ass Fans, Freescale, Nest, Samsung, Silicon Labs, and Yale Security, have come together to start …

Support CNX Software – Donate via PayPal, become a Patron on Patreon, or buy review samples