@andyclap When the battery is depleted, the noise source is from the DCDC boost inductor on the board, thanks for your feedback, I will discuss the solution with my team.
Recommendations on power consumption:
When starting T-Higrow, it is recommended to reduce the main frequency of ESP32 to 160, or lower, if not using WiFi, it is recommended to lower to 80, 40MHz
If WiFi transmission is used, it is recommended to reduce the number of transmissions, and then package and send the data uniformly. The number of acquisitions can remain unchanged.
Thanks for your feedback.