05

6.0

Pin Details

Table 1 – Module pinout

† The pins on the RTC power domain can be used during deep sleep, specifically GPIO pins will maintain their state while in deep sleep.

* ADC2 is currently not supported in the micropython firmware

Module

Pin

ESP32

GPIO

Pin

Name

Default Function

ADC

PWM

RTC†

Notes

19

35

P17

Sequans modem

CTS

1

Input only, not recommended for

external use

20

34

P18

Sequans modem

RX

1

Input only, not recommended for external

use, 921600 Baud

21

32

P19

Sequans modem

RTS

1

Not recommended for external use

22

33

P20

Sequans modem

TX

1

Not recommended for external use,

921600 Baud

23

26

P21

2*

DAC

24

25

P22

2*

DAC

25

14

P23

2*

JTAG TMS, SD card SCLK

26

–

–

Regulated 3.3V

supply

Output only, do not feed 3.3V into this pin

or you can damage the regulator

27

–

–

Ground

28

–

–

Voltage Input

Accepts a voltage between 3.5V and 5.5V

–

23

–

LoRa/Sigfox radio

interrupt

–

18

–

LoRa/Sigfox radio

chip select

6.1

Remapping Pins

The ESP32 features comprehensive pin remapping

functionality. This allows peripherals to be mapped

onto almost any available GPIO pins. The above table

merely shows the default assignments. For example, the

default mapping has the SPI and I2C clocks overlapping,

meaning both cannot be used simultaneously without

remapping one to a different pin. For a detailed guide of

what peripheral can be assigned to what pins please read

“Appendix A – ESP32 Pin Lists” of the ESP32 datasheet.