Circuit Diagram

ESP32

• ESP32 GPIO33 to SDA on BME280
• ESP32 GPIO32 to SCL on BME280
• ESP32 3.3V to VIN on BME280
• ESP32 GND to GND on BME280
• ESP32 GPIO35 to Signal on SEN0193
• ESP32 GND to GNO on SEN0193
• ESP32 3.3v to VIN on SEN0193
• ESP32 GND to GND on Relay
• ESP32 5.0V to VIN on Relay
• ESP32 GPIO4 to Signal on Relay
• ESP32 GND to Switch

DC 5V Power Source

• DC 5V + to Centre Screw Relay
• DC 5V - to GND of Water Pump

Relay

• Right Screw of Relay to VIN of Water Pump

PT4056

• PT4056 Pin 3 to ESP32 5.0V
• PT4056 Pin 4 to VIN of Battery
• PT4056 Pin 5 to GND of Battery
• PT4056 Pin 6 to Switch