OP here. Correct! I use wifi to sync time. This is a convenience to the user. I know there are circuits for receiving radio broadcast official time signals. I a

OP here. Correct! I use wifi to sync time. This is a convenience to the user. I know there are circuits for receiving radio broadcast official time signals. I also know that high precision, low drift clock circuits exist. However, IoT approach is simpler and actually less expensive in low quantities. I think that anyone who will pay $1400 for a clock will have wifi available. I apologize to anyone with an edge case that does not. If they contact me directly, I'm sure I can provide them a solution. FYI, the internet time sync is infrequent and low bandwidth.