Links:

Schematic sensor simple: sensor-schem Breadboard: sensor_bb
Smart UPS for Orange Pi: sensor-schem3 Breadboard: sensor_bb3 Layout: device
Linux testing: linux-bluetoothctl Linux shutdown script: shutdown-script
Client for 4 sensors: ESP32-S3-BLE-CLIENT-4S

The device has been tested using programs:

Connection setup:

Example of communication: