Modify OpenWirt Firmware and create new one

Hi, We have the WE826-T2-16 Mb and installed Openwrt openwrt-21.02.3-ramips-mt7620-zbtlink_zbt-we826-16m-squashfs-sysupgrade. Now we like to update this firmware, so we get a new firmware to do all explained below: 1. Make sure the UCI calls (see attachment) are default configuration in the new firmware 2. Get variables from a server explained in `Get variables` part 3. Make a script explained in the part `Discover DHCP` 4. Set Root password of router GET VARIABLES In the UCI calls we have some variables. Some are hardcoded. But a few we need to get with a simple post call like below, and store. If post call is not available we should retry a few times, and if still not available sent an other post call and only retry after restarting the modem. Post first time: ``` curl --location -g --request POST '[login to view URL]' \ --header 'Content-Type: application/json' \ --data-raw '{ "mac":"Mac-of-router" }' ``` Output (with values variables for UCI): ```` { "COMPANY":"company-z", "WIFIPASS":"yyyccccc" } ``` Post if no is same call with body: ``` { "mac":"Mac-of-router" "message":"No results for Mac" } ``` DISCOVER DHCP We should create some kind of a script to watch new DHCP clients on the Lan and Wifi. Then if a new device is connected, with hostname `lwip` we should give it an static IP in the order of: [login to view URL], [login to view URL] etc. So if I add 3 devices with that hostname, we will bind the MAC of them so they get IP like: - [login to view URL] - [login to view URL] - [login to view URL] - [login to view URL] For wifi we should do the same. But then it should be in the range: - [login to view URL] - [login to view URL] etc To do: - Review, optimise and advise the UCI calls attached to configure the Router - Install 4 G modem and configure as fallback ( I dont know how to do this in OpenWrt) - Make some troubleshoot options (to advice/discuss), to revert in case of problems. Deliverables: - A step to step document + demo how to do all above. So its reproducible for us in the future. - A working new firewall to install on a router to test - A working demo on one of our routers