sends a command string to the TC66C. There are only 7 valid ones (so far): query response 4 bytes 'firm' or 'boot' getva response 1

Fetches the complete used recording buffer (up to 1440 entries) from the TC66C and returns it in from of a list of RecData Each RecData en

Polls the TC66C for new data and returns it in form of a PollData record The data comes in a 192 byte package AES encrypted