@sufy You can't have a mesh network between two RE215, but you can add a second RE to extend your wireless coverage. Check this FAQ (Part 3) - Q3.6 and Q3.11 to know the considerations of adding an...

@Donnje It should be compatible, because RE200 supports b,g and n Wi-Fi standards on 2.4GHz band and RE5V1 probably uses the n-standard as other Sonoff devices.

@Hammy1948 You have several option to do that. 1. A dedicated Access Point device. 2. Wireless router in AP mode. 3. Range Extender in AP mode. Either of these would do the job, you need just to...

@ALL_SYS_PWRGD Can't tell for sure, but It could be just a strong wireless interference on the 2.4 GHz band. Use an app like inSSIDer ot Wi-Fi Analyzer to select the least crowded channel.

@ALL_SYS_PWRGD Yes, there is actually. In your current configuration you could introduce a double NAT, having VR600 in 'Wireless router mode'. You have three ethernet ports available for wired...

@ALL_SYS_PWRGD In general this guide should cover configuring VR600 in AP mode. Your DSL router should be in 'DSL modem router mode'. If particular devices can't obatain their IP address from your...