RF Bridge Feature Update 2021.4.8 - SONOFF Official
Sonoff 4CH PRO (R3) WiFi + RF smart relay switch with 4 channels, NO/NC and dry contact support - eWelink Store
SONOFF Mini R2 10A Smart WiFi Wireless Light Switch, Universal DIY Module for Smart Home Automation Solution, Works with Amazon Alexa & Google Home Assistant, No Hub Required(MINI Upgrade): Amazon.com: Tools &
Advice on Zigbee range extending - #40 by dproffer - Zigbee - Home Assistant Community
General Itead Sonoff ramblings - now with Zigbee - Scargill's Tech Blog
General Itead Sonoff ramblings - now with Zigbee - Scargill's Tech Blog
Zigbee Development - The Really Big Update inc ZZH - Scargill's Tech Blog