TTGO T-Beam V1.0 & OLED & deep sleep needs proper power design

T-Beam is good for evaluation, but not suitable for production use.
There is a broad market for sensor boards. You need to get a clear view on your requirements.

You may take a look at MCCI’s boards. They are on high level of serious engineering.

China products often have a lifecycle of a few months only, then often disappear from the market or version changes. And there are copies with issues etc.