1. First find the com port on the esp32-s3

ls /dev/tty*
// 
export ESPFLASH_PORT=/dev/ttyACM0
// can be ttyACM1 or ... 

Then you can run the espflash board-info command to check if you can connect to the uart com port on the esp32-s3.

Useful commands

rustup update cargo install cargo-espflash rustup show rustup override set stable rustup override set nightly

Add probe-rs

Change the cargo runner in the .cargo/config.toml file to:

[target.xtensa-esp32s3-none-elf]
# runner = "espflash flash --monitor"
runner = "probe-rs run --chip esp32s3"


[env]
ESP_LOGLEVEL="INFO"

[build]
rustflags = [
  "-C", "link-arg=-nostartfiles",
]

target = "xtensa-esp32s3-none-elf"

[unstable]
build-std = ["core"]

Then when you run cargo run probe-rs is started.

Before you can use probe-rs in nvim, you need to configure the nvim-dap to support probe-rs. probe-rs for nvim-dap doc