This was a problem. Davis had updated the firmware on their latest consoles to only accept genuine Davis loggers. I didn't have a clue what they had done. But it did turn into a nightmare for them as well; their older loggers also didn't work.
This became known as the green dot issue since all the latest consoles were supplied with a green sticker on the packaging.
This is when the famine started, I could no longer supply my clones.
But then came the Eureka moment.
This led to me being able to sell loggers again.