SkyRizz E32

SkyRizz E32 is an open-source, Solana-focused embedded hardware platform designed to make it easier for developers to build secure, connected, real-world products on Solana.

Highlights

• ESP32-S3-WROOM-1-N16R8 main module
• SE050C2HQ1/Z01SDZ secure element integration
• Shared onboard I2C bus for sensors, touch, security, and GPIO expansion
• LCD, touch, camera, audio, microSD, and RGB LED support on the board
• External headers labeled IO 1, I2C, IO 2, and IO 3
• Firmware-oriented references under PCB/pinout/

Hardware specs

Area	Details
Main compute module	ESP32-S3-WROOM-1-N16R8
Wireless	Integrated ESP32-S3 Wi-Fi + Bluetooth LE
Memory variant	N16R8 module variant (16 MB flash / 8 MB PSRAM)
Security	SE050C2HQ1/Z01SDZ secure element on the shared I2C bus
I/O expansion	XL9535QF24 16-bit I2C GPIO expander
Environmental sensors	AHT20 temperature/humidity, LTR-303ALS-01 ambient light, SC7A20HTR accelerometer
Display and touch	LCD flex connector (FPC1) plus TSC2007IPWR touch controller
Camera	Camera flex connector (FPC3) with direct ESP32 camera GPIO routing
Audio	ES7243E audio ADC, NS4168 speaker amplifier, 2x MSM381ACP003 microphones
Storage	TF1 microSD socket and GT30L24A3W SPI ROM / font chip
USB	USB Type-C with native USB FS on GPIO19 / GPIO20
LEDs	2x XL-0807RGBC-2812B WS2812-style RGB LEDs plus a separate indicator LED
External expansion	Direct GPIO1, shared I2C breakout, and XL9535-backed P1-P7 expansion headers

Modules and major ICs used on the board

Category	Module / refdes	Part	Role
Main controller	U1	ESP32-S3-WROOM-1-N16R8	Main MCU and wireless module
Security	U18	SE050C2HQ1/Z01SDZ	Secure element
I/O expansion	U9	XL9535QF24	16-bit GPIO expander for external pins, resets, buttons, and indicator LED
Sensors	HUM	AHT20	Temperature and humidity sensing
Sensors	LS	LTR-303ALS-01	Ambient light sensing
Sensors	U5	SC7A20HTR	Accelerometer
Touch	U10	TSC2007IPWR	Resistive touch controller
Display	FPC1	LCD flex connector	LCD interface and backlight path
Touch/control flex	FPC2	Touch/control flex connector	Shared I2C and touch control breakout
Camera	FPC3	Camera flex connector	Camera interface
Audio input	U14	ES7243E	Audio ADC
Audio output	U13	NS4168	Speaker amplifier
Audio input	MIC1, MIC2	MSM381ACP003	Microphones
Storage	TF1	TF / microSD socket	Removable storage
Storage	U2	GT30L24A3W	SPI ROM / font chip
LEDs	RGB1, RGB2	XL-0807RGBC-2812B	Addressable RGB LEDs
Indicator	IND	KT-0603YG	User / status LED
USB	USB1	USB-TYPE-C-018	USB Type-C connector
External headers	C_I2C, C_P0, C_P1-3, C_P4-7	JST / board connectors	I2C and external GPIO breakout
Power connector	BATT	PH-2P	Battery connector

Repository layout

Path	Purpose
PCB/	Hardware design package, manufacturing files, imagery, and pinout references

PCB/ contents

The PCB/ directory includes the current hardware package:

Path	Description
SKYRIZZ-E32-Schematic-v1.0.pdf	Versioned schematic export for the board
PCB-design-alpha.pdf	PCB layout/design export
BOM-SKYRIZZ-E32-v1.0.xlsx	Bill of materials for sourcing parts
PickAndPlace_E32-v1.0.xlsx	Placement data for assembly
skyrizz_e32_se050.epro	EasyEDA Pro project source archive
pcb-prototype-alpha-front.jpeg	Front-side prototype photo
pcb-prototype-alpha-back.jpeg	Back-side prototype photo
assets/	Logos, board renders, and supporting images
pinout/pin_map.md	Module-by-module wiring map from board parts to firmware paths
pinout/pin_capabilities.md	ESP32-S3 pin capabilities cross-referenced with this PCB
pinout/no_std_board_pins.rs	Reusable Rust pin definitions for board bring-up
pinout/no_std_board_self_test.rs	HAL-agnostic self-test harness for board validation

External headers at a glance

The updated pinout references document the board-silk connector names and how firmware reaches them:

• IO 1 / C_P0: exposes P0 on native GPIO1
• I2C / C_I2C: direct breakout of GPIO48 (SCL) and GPIO47 (SDA)
• IO 2 / C_P1-3: P1-P3 through the onboard XL9535 I/O expander
• IO 3 / C_P4-7: P4-P7 through the onboard XL9535 I/O expander

Only IO 1 is a direct native ESP32 GPIO breakout. IO 2 and IO 3 are I2C-backed GPIOs exposed through the XL9535, which is useful to know when planning latency-sensitive firmware or external attachments.

Getting started

For hardware builders

1. Review SKYRIZZ-E32-Schematic-v1.0.pdf and PCB-design-alpha.pdf.
2. Use BOM-SKYRIZZ-E32-v1.0.xlsx and PickAndPlace_E32-v1.0.xlsx for sourcing and assembly.
3. Open skyrizz_e32_se050.epro in EasyEDA Pro if you want to inspect or modify the original design.
4. Compare assembly and routing details against the prototype photos and assets in PCB/.

For firmware and board bring-up

1. Start with PCB/pinout/pin_map.md for the board-level wiring overview.
2. Use PCB/pinout/pin_capabilities.md when you need to know both ESP32-S3 capabilities and existing board assignments.
3. Reuse PCB/pinout/no_std_board_pins.rs and PCB/pinout/no_std_board_self_test.rs as bring-up references for custom firmware.

Project status

The board is still in an alpha/prototype phase, but the repository now includes the current schematic, manufacturing data, major board module inventory, EasyEDA source archive, webpage assets, and firmware-facing pinout references for the latest documented hardware package.

Contributing

Issues and pull requests are welcome, especially for documentation, board validation notes, and firmware bring-up references.

License

This project is licensed under the GNU General Public License v3.0 or later. See LICENSE for the full text.