RFID tags can store information. They can also contain sensors. I have set them up for use in cows and provided software to operate the bi-directional link.
11 posted on 12/21/2021 10:26:50 AM PST by GingisK
18 posted on 12/21/2021 11:35:35 AM PST by E. Pluribus Unum
("Communism is not love. Communism is a hammer which we use to crush the enemy." ― Mao Zedong)