ESP32-S3-µMETER

Board Overview

ESP32-S3-µMETER

Name:

esp32s3_micrometer

Vendor:

Auxspace e.V.

Status:

Maintained

Architecture:

xtensa

SoC:

esp32s3

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Overview

The Auxspace e.V. ESP32-S3-µMETER PCB is a minimal flight computer on a 4-layer PCB with an ESP32-S3-WROOM-1 from Espressif.

Hardware

ESP32-S3 is a low-power MCU-based system on a chip (SoC) with integrated 2.4 GHz Wi-Fi and Bluetooth® Low Energy (Bluetooth LE). It consists of high-performance dual-core microprocessor (Xtensa® 32-bit LX7), a low power coprocessor, a Wi-Fi baseband, a Bluetooth LE baseband, RF module, and numerous peripherals. More about that can be found in the zephyr docs of the ESP32-S3.

Specifically added features include:

• 6-DoF IMU

• Barometer

• Buzzer

• 2-channel Pyro ignition

• CAN-bus for communication with posible expansion PCBs

• µSD-Card slot

Supported Features

The esp32s3_micrometer board supports the hardware features listed below.

on-chip / on-board

Feature integrated in the SoC / present on the board.

2 / 2

Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.

vnd,foo

Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

esp32s3_micrometer/esp32s3/procpu target

Type	Location	Description	Compatible
CPU	on-chip	Espressif Xtensa LX7 CPU2	espressif,xtensa-lx7
ADC	on-chip	ESP32 ADC2	espressif,esp32-adc
Bluetooth	on-chip	Bluetooth HCI for Espressif ESP321	espressif,esp32-bt-hci
CAN	on-chip	ESP32 Two-Wire Automotive Interface (TWAI)1	espressif,esp32-twai
Clock control	on-chip	ESP32 Clock (Power & Clock Controller Module) Module1	espressif,esp32-clock
Counter	on-chip	ESP32 Counter Driver based on RTC Main Timer1	espressif,esp32-rtc-timer
	on-chip	ESP32 general-purpose timers13	espressif,esp32-timer
	on-chip	ESP32 counters4	espressif,esp32-counter
Cryptographic accelerator	on-chip	Espressif ESP32 SHA Hardware Accelerator1	espressif,esp32-sha
	on-chip	Espressif ESP32 family AES Hardware Accelerator1	espressif,esp32-aes
DMA	on-chip	ESP32 GDMA (General Direct Memory Access)1	espressif,esp32-gdma
Flash controller	on-chip	ESP32 flash controller1	espressif,esp32-flash-controller
GPIO & Headers	on-chip	ESP32 GPIO controller2	espressif,esp32-gpio
I2C	on-chip	ESP32 I2C2	espressif,esp32-i2c
I2S	on-chip	ESP32 I2S2	espressif,esp32-i2s
Input	on-chip	ESP32 touch sensor input1	espressif,esp32-touch
	on-board	Group of GPIO-bound input keys1	gpio-keys
Interrupt controller	on-chip	ESP32 Interrupt controller1	espressif,esp32-intc
IPM	on-chip	ESP32 soft inter processor message1	espressif,esp32-ipm
LED	on-board	Group of PWM-controlled LEDs1	pwm-leds
Mailbox	on-chip	ESP32 soft mailbox1	espressif,mbox-esp32
Memory controller	on-chip	ESP32 pseudo-static RAM controller1	espressif,esp32-psram
MIPI-DBI	on-chip	ESP32 LCD-CAM display interface1	espressif,esp32-lcd-cam-mipi-dbi
Miscellaneous	on-chip	ESP32 LCD-CAM controller1	espressif,esp32-lcd-cam
	on-board	PWM passive buzzer1	auxspaceev,pwm-buzzer
MTD	on-chip	Flash node1	soc-nv-flash
	on-chip	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Pin control	on-chip	ESP32 pin controller1	espressif,esp32-pinctrl
PWM	on-chip	ESP32 LED Control (LEDC)1	espressif,esp32-ledc
	on-chip	ESP32 Motor Control Pulse Width Modulator (MCPWM)2	espressif,esp32-mcpwm
Pyrotechnic Ignition	on-board	Basic pyro module1	auxspaceev,basic-pyro
RNG	on-chip	ESP32 TRNG (True Random Number Generator)1	espressif,esp32-trng
SDHC	on-chip	ESP32 SDHC controller1	espressif,esp32-sdhc
	on-chip	ESP32 SDHC controller slot2	espressif,esp32-sdhc-slot
Sensors	on-board	STMicroelectronics LSM6DSO32 6-axis IMU (Inertial Measurement Unit) sensor accessed through I2C bus1	st,lsm6dso32
	on-board	STMicroelectronics LPS22HH pressure and temperature sensor connected to I2C bus1	st,lps22hh
	on-chip	ESP32 internal temperature sensor1	espressif,esp32-temp
	on-chip	ESP32 Pulse Counter (PCNT)1	espressif,esp32-pcnt
Serial controller	on-chip	ESP32 UART3	espressif,esp32-uart
	on-chip	ESP32 UART1	espressif,esp32-usb-serial
SPI	on-chip	ESP32 SPI controller2	espressif,esp32-spi
SRAM	on-chip	Generic on-chip SRAM2	mmio-sram
USB	on-chip	ESP32 USB-OTG (DWC2 compatible controller)1	espressif,esp32-usb-otg
Video	on-chip	ESP32 LCD-CAM camera interface1	espressif,esp32-lcd-cam-dvp
Watchdog	on-chip	ESP32 XT Watchdog Timer1	espressif,esp32-xt-wdt
	on-chip	ESP32 watchdog2	espressif,esp32-watchdog
Wi-Fi	on-chip	ESP32 SoC Wi-Fi1	espressif,esp32-wifi

Connections and IOs

• UART for programming and debugging

• SW1 for inputs

• Two seperated pin-pairs for the pyros

• Pins for battery

• 6-pin connector for expansion PCBs; don’t throw heavy loads an the 3V3 pin, it may overheat the LDO.

Programming and Debugging

The esp32s3_micrometer board supports the runners and associated west commands listed below.

	flash	debug	attach	debugserver	rtt
esp32	✅ (default)
openocd	✅	✅ (default)	✅	✅	✅

Warning

If no µSD-Card is inserted, the board will have trouble booting, since the SPI-SDHC driver has no way to detect card presence without a card-detect-pin!

Building

µMeter is built with sysbuild since it uses the MCUBoot boot loader:

west build -p -b esp32s3_micrometer/esp32s3/procpu --sysbuild sensor_board

Flashing

west flash is unfortunately not working with this setup, since the ESP requires the download mode to be set when booting and west flash is chain loading both images after one another.

Instead, flash both images in download mode and then just reset, using esptool:

esptool --chip esp32s3 -p /dev/tty<ESP_DEV> -b 921600 write-flash \
  0x0 build/mcuboot/zephyr/zephyr.bin \
  0x20000 build/sensor_board/zephyr/zephyr.signed.bin