VCCTTL header
Selectable 5V or 3.3V auxiliary supply pin, 50mA, for powering the connected device when appropriate.
Type · power
GNDinterface terminals
Ground reference for TTL/RS232/RS485 connections.
Type · ground
TXDTTL/RS232 interface
TTL/RS232 transmit data, full-duplex serial.
Type · uart
RXDTTL/RS232 interface
TTL/RS232 receive data, full-duplex serial.
Type · uart
ARS485 terminal
RS485 differential line A for half-duplex communication.

Start wiring

UART

Confirm the data interface matches your host board.

Module pins: VCC, GND, TXD, RXD. Schematik maps them to your board in the app.

Related groups

4 groups

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Air quality

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