1 2 3 4 5 6 +3.3V +3.3V +3.3V +3.3V +3.3V R2 R1 4.7k 6 8 4.7k ESP_EN U1 MPU_SCL 4 I D SCK D V ESP_EN ESP32-WROOM-32E ESP_IO0 MPU_SDA 3 D 2 SDI V U3 5 3 D 25 ESP_IO0 GND SDO BMP280 A J1 EN V IO0 +3.3V +3.3V 2 D D A 35 ESP_TX +3.3V CSB N N Conn_01x02_Pin TXD0/IO1 G