OpenWrt configuration. Users guide. Part 1. How to configure wifi in STA+AP mode. - NetSoM
Amazon.com: TAKTIKAL 5G / 4G LTE Dual-Band Openwrt Wi-Fi Sim Router for Home & Business with 4 x 4 MU-MIMO, Band Lock, OpenVPN, Zero-Tier, & TTL - Plug and Play Connection on
Petr's blog about Linux: Turris - OpenWrt configuration