The best I can find is LEDE but the code a dev wrote for us only runs on newer openwrt.
Does anyone know of a base, limited build for the TP-Link TL-WR703N that someone might be sharing on the Internet?
I realize 4MB is small for new openwrt but I barely install anything. I just need the operating system to be a very basic one, no luci, no firewall, barely anything but bash. I use these to read sensors that are connected to the USB port. Bash script polls, sends, polls, sends, nothing else.
All of the TL-WR703N become bricks for me unless I can run 18.x.
bash alone will likely kill you -- consider rewriting your scripts to be ash (sh) compatible. shellcheck on another platform may be helpful in finding and removing "bash-isms", along with https://wiki.ubuntu.com/DashAsBinSh
I ran a build and it seemed to complete however.
make image profile=tl-wr703n-v1
-rw-r--r-- 1 root root 3604484 May 20 12:56 openwrt-ar71xx-tiny-tl-wr703n-v1-squashfs-sysupgrade.bin
Updating the device lost it. It won't grab a DHCP IP anymore. I do use my own files/ which should use DHCP.
Stragenly, now I cannot even use default reset methods to get back into it. It comes up with 192.168.1.1 but no services what so ever, no telnet, no ssh, etc. It's not bricked yet there is no way into it any more.
I used to compile the 18.06.2 image for tl-wr703n from source and succeeded. It contains LuCI, but no kmod-usb-core and kmod-usb2. That won't be an issue for me since I have modded my router.
I've also succeeded in compiling it from the image builder. This time the image does not have LuCI, but it has the kmods.
As long as you followed the doc on build system and installed all prerequisites, I think it won't be a problem.