Pinout

Besides the main pin header there are also other connections: Three pins for the SPI ports, two for the ESP32-C3’s ISP pins and two for an external battery.

Pin NameDescriptionFeatures
GNDNegative PoleGround
VCC3.3V Output

1

Power Out
P0Connected to ESP32-C3 GPIOADC, PWM
P1Connected to GPIO Expander P1_1CCR
P2Connected to GPIO Expander P1_0CCR
P3Connected to GPIO Expander P1_7CCR
P4Connected to GPIO Expander P1_6CCR
P5Connected to ESP32-C3 GPIO3ADC, PWM
SCLI2C Serial Clock2

2

(connected to ESP32-C3 GPIO9)		PWM
SDAI2C Serial Data2

2

(connected to ESP32-C3 GPIO8)		PWM
VBATConnected to the on-board Charging ModuleCharger
MISOSPI Master in Slave out

3

PWM
MOSISPI Master out Slave in

3

PWM
SCKSerial Wire Data Line

3

ADC, PWM
TXReceive line of the ESP32-C3

3

UART, PWM
RXTransmit line of the ESP32-C3

3

UART, PWM

1

VCC is meant to be an output. If you want to use it as an input, do not connect any other source (battery/USB) to it.

2

Not recommended to be used as normal GPIO ports. All modules on the Pocuter will be inactive when using them.

3

Not recommended to be used as normal GPIO ports. If used anyway, neither the OLED screen nor SD card fill function.