Here the steps for the installation of the Lineage OS 18.1 on SM-T555 (gt510lte).
How to use ODIN or HEIMDALL, please use the Readme's or the other documentationes of these software for flashing this devices!
For damage, bricking or loosing datas I 'm not responsable, also please read it carafully step by step and make first an backup of this devices. How to uses backup or install, please use the searching function in this forum or other searching machines.
Translated from German to English
Enter Odin Mode:
1. press Home & Vol- & PWR simultaneously.
Install twrp2.8 first, then the new versions!
2. heimdall flash --RECOVERY recovery.img --no-reboot
2.1 Extract the files from lineage-18.1-20210424-UNOFFICIAL-gt510lte.zip:
- system.new.dat.br
- boot.img
- system.transfer.list
2.2 brotli -d system.new.dat.br system.new.dat
2.3 ./sdat2img.py system.transfer.list system.new.dat system.img
2.4 heimdall flash --BOOT boot.img --no-reboot
2.5 Put back into download mode
2.6 heimdall flash --SYSTEM system.img
3 Home & Vol+ & PWR => twrp
3.1 In TRWP only execute "wipe Data".
Lineageos 18.1 Download:
Lineage 18.1
Heimdall, broti and dat2img.py - Linuxapplications, please have a look in to your repo.
dat2img.py:
dat2img
Brotli:
Brotli
Bugs: In this moment unkown.
Let's have a look an cross the finges for installing