Hey there!
I’m trying to use GPIO1 and GPIO3 (labelled RXD and TXD) on my board as digital inputs, but I can’t get the pull-down resistors to work. I know these pins are used by the default logger. I’ve tried moving the logger to a different interface (UART1) or disabling (commenting it) entirely, but I still can’t get the pull downs to work.
From reading the data-sheet, I don’t see any reason why it shouldn’t be possible
Controller: ESP32-WROOM-32, Board: ESP DEVKITV1
My Home Assistant dashboard shows 8 binary sensors (I can’t show a screenshot as a user, I’m limited to a single attachment).
- The first 6 binary sensors work as expected: default off, and turn on when I short them to 3.3v.
- The last two pins show up as on by default, and only turn off when I short them to ground (which I probably shouldn’t be doing haha).
Is there something I’m missing here?
YAML:
esphome:
name: garage-door
esp32:
board: esp32dev
framework:
type: esp-idf
version: recommended
# Enable logging
logger:
# Use UART1 instead of default (UART1), which uses GPIO9 (Tx) GPIO10 (Rx), neither of which are exposed on the dev board pins.
hardware_uart: UART1
level: VERY_VERBOSE
api: # <redacted>
ota: # <redacted>
wifi: # <redacted>
binary_sensor:
- platform: gpio
id: dev_level_shifter_b8
name: (dev) Level shifter B8 (D4)
pin:
number: GPIO04 # D4
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b7
name: (dev) Level shifter B7 (RX2)
pin:
number: GPIO16 # RX2
mode: { input: true, pulldown: true }
# Skipping GPIO5, it's a boot-strapping pin
- platform: gpio
id: dev_level_shifter_b6
name: (dev) Level shifter B6 (TX2)
pin:
number: GPIO17 # TX2
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b5
name: (dev) Level shifter B5 (D18)
pin:
number: GPIO18 # D18
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b4
name: (dev) Level shifter B4 (D19)
pin:
number: GPIO19 # D19
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b3
name: (dev) Level shifter B3 (D21)
pin:
number: GPIO21 # D21
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b2
name: (dev) Level shifter B2 (RX0)
pin:
number: GPIO3 # RX0
inverted: false
mode: { input: true, pulldown: true }
- platform: gpio
id: dev_level_shifter_b1
name: (dev) Level shifter B1 (TX0)
pin:
number: GPIO1 # TX0
inverted: false
mode: { input: true, pulldown: true }