Inkplate 6 – Free GPIO pins
Inkplate 6's onboard ESP32-WROVER has some pins reserved for internal use (for example, the connection to the e-paper display) and cannot be used for end-user applications. This page contains a list of the available GPIO pins that can be used for external applications.
If you don't need pin details and are just interested in the pins, here are the Inkplate 6 pins that are not connected to any external component:
GPIO EXPANDER 1: P1-3 to P1-7, GPIO EXPANDER 2: P0-0 to P0-7, P1-0 to P1-7
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On IO expander 1, pins P0-0 to P0-7 drive the e-paper power supply and panel control signals, P1-0 controls the GPIO0 MOSFET, P1-1 enables the battery voltage divider, and P1-2 switches microSD card power. Only P1-3 to P1-7 are free. IO expander 2 is entirely free and broken out to pads.
Inkplate 6 free pins
See the table below for pin functions and what each pin is connected to:
Free pin table
| PIN | CONNECTED TO | FUNCTION |
|---|---|---|
| TXD | CH340 | UART transmit pin |
| RXD | CH340 | UART receive pin |
| IO12 | microSD (MISO) | ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3 |
| IO13 | microSD (MOSI) | ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER |
| IO14 | microSD (SCK) | ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2 |
| IO15 | microSD (CS), JP4 Check jumper details | ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3 |
| IO34 | JP2 Check jumper details | ADC1_CH6, RTC_GPIO4 |
| IO35 | V_BAT | ADC1_CH7, RTC_GPIO5 |
| IO36 | WAKEUP BUTTON | ADC1_CH0, RTC_GPIO0 |
| IO39 | JP5 Check jumper details | ADC1_CH3, RTC_GPIO3 |
| P1-3 to P1-7 expander 1 | FREE | I/O |
| P0-0 to P0-7, P1-0 to P1-7 expander 2 | FREE | I/O |