Inkplate 6FLICK – Free GPIO pins
Inkplate 6FLICK'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 6FLICK pins that are not connected to any external component:
GPIO EXPANDER 1: P1-6, P1-7, GPIO EXPANDER 2: P0-0 to P0-7, P1-0 to P1-7
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Inkplate 6FLICK uses more of its GPIO than the other Inkplates, because the touchscreen and the frontlight both need control lines. Every ESP32 pin is taken: the e-paper bus uses IO2, IO4, IO5, IO18, IO19, IO23, IO25, IO26 and IO27, and
IO36 doubles as the wake button and the touch interrupt. If you need pins, use IO expander 2, which is entirely free and broken out to pads.
Inkplate 6FLICK 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), JP2 Check jumper details | ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3 |
| IO34 | JP6 Check jumper details | ADC1_CH6, RTC_GPIO4 |
| IO35 | V_BAT | ADC1_CH7, RTC_GPIO5 |
| IO36 | WAKE UP button and touch interrupt | ADC1_CH0, RTC_GPIO0 |
| IO39 | JP3 Check jumper details | ADC1_CH3, RTC_GPIO3 |
| P1-0 | GPIO0 MOSFET | I/O on IO expander 1 |
| P1-1 | JP8 Check jumper details | Enables the battery voltage divider |
| P1-2 | Touchscreen reset | Drives the touchscreen controller's reset line |
| P1-3 | Frontlight enable | Switches the frontlight driver circuit |
| P1-4 | Touchscreen power | Switches power to the touchscreen controller |
| P1-5 | JP7 Check jumper details | Switches microSD card power |
| P1-6, P1-7 | FREE | I/O on IO expander 1, broken out to pads |
| Expander 2: P0-0 to P0-7, P1-0 to P1-7 | FREE | I/O on IO expander 2, broken out to pads |