How to connect UARTSBeeV4 to ESP8266 based WiFi module (SKU:317060015). ← Seeed Products' FAQ UartSBee_V4 ESP8266 based WiFi module - SPI supportedVCC(3.3V)-> VCCTX-> RXDRX->TXDGND-> GNDMake CH_PD to Active High in order to enable Wifi module and refer the brief spec Note : Set the power selection switch to 3.3V on UartSbee_V4