Blinky with ESPHome ESP32-S3

dev board ESP32-S3-DevKitC-1

chip ESP32-S3-WROOM-1-N8R2

features esphome esp32s3 blinky

Before starting

Dependancies

Ensure the following dependancies are downloaded and available:

ESPHome

Pre-requisites

Try these simpler or similar examples:

Hello world with ESPHome on ESP32-S3

Buy the components

ESP32-S3-DevKitC-1-N8R2

Code

Download config blinky-esphome-esp32s3.yaml

esphome:
  name: blinky

esp32:
  board: esp32-s3-devkitc-1
  variant: esp32s3
  framework:
    type: arduino
    version: 2.0.3
    platform_version: 5.1.0

logger:
  level: VERBOSE
  baud_rate: 115200
  deassert_rts_dtr: true

switch:
  - platform: gpio
    pin:
      number: 5 # default LED on-board GPIO48, does not seem to work
      mode: output
    id: led

interval:
  - interval: 2s
    then:
      - switch.toggle: led
      - logger.log: "LED toggling"

Makefile

YAML_FILE=blinky-esphome-esp32s3.yaml
UPLOAD_PORT?=/dev/cu.usbmodem14*
SERIAL_PORT?=/dev/cu.usbserial-14*

.PHONY: default compile upload log clean

default: clean compile upload

help: ## Show help message
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m\033[0m\n"} /^[$$()% 0-9a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)

compile: ## Compile esphome
	esphome compile $(YAML_FILE)

upload: ## Upload the firmware to the board
	@echo "Ensure you plug in the board into the USB port"
	esphome upload --device $(UPLOAD_PORT) $(YAML_FILE)

log: ## Start the logs
	@echo "Ensure you plug in the board into the UART port"
	esphome logs --device $(SERIAL_PORT) $(YAML_FILE)

clean: ## Remove all build files
	rm -r .esphome

Prototype

A photo of the actual setup.

Schematic

Wire up the hardware accordingly

Serial console

Serial output from the firmware.

Use GPIO5 to add a simple external LED

Description

LED

The default RGB LED on-board which is GPIO48, does not seem to work with ESPHome. So, wireup a simple LED and resistor to GPIO5 pin on the board.

Compile and upload

Compile firmware for this board

 esphome compile blinky-esphome-esp32s3.yaml

Plug into the USB port of the board and check the port address

 $ ls /dev/cu.*

 /dev/cu.Bluetooth-Incoming-Port  /dev/cu.usbmodem14101

Upload the firmware

 esphome upload --device /dev/cu.usbmodem14101 blinky-esphome-esp32s3.yaml

Access logs

Unplug and plug into the UART port of the board

Check the new port address

 $ ls /dev/cu.*
 /dev/cu.Bluetooth-Incoming-Port  /dev/cu.SLAB_USBtoUART  /dev/cu.usbserial-1410

Access the logs

 esphome logs --device /dev/cu.usbserial-1410 blinky-esphome-esp32s3.yaml