You made may day, @Zorro
Recovered the router with original fw, upgraded manually to 2.18.58 via web UI
Tried again the OpenWRTInvasion to get telnet access and now it works.
Now, what is the correct fw to upload to the 4A 100M?
Is this the correct page where to download?
The snapshot or the other one?
curl http://downloads.openwrt.org/releases/19.07.2/targets/ramips/mt76x8/openwrt-19.07.2-ramips-mt76x8-xiaomi_mir4a-100m-squashfs-sysupgrade.bin --output firmware.bin # Is this the correct fw??
./busybox sha256sum firmware.bin # Verify the firmware checksum before flashing, very important to avoid bricking your device!
mtd -e OS1 -r write firmware.bin OS1 # Install OpenWrt
After flashing should I do this?
After flashing openwrt FW you need to ssh to router and install luci then enable wifi from settings.
3.opkg install luci