	Module Name	MCU	Flash	RAM	Pins**	Wi-Fi	BLE	Platform name
❌	WB1S	BK7231T @ 120 MHz	2 MiB	256 KiB	18 (11 I/O)	✔️	✔️	-
❌	WB2L	BK7231T @ 120 MHz	2 MiB	256 KiB	7 (5 I/O)	✔️	✔️	-
❌	WB2S	BK7231T @ 120 MHz	2 MiB	256 KiB	11 (8 I/O)	✔️	✔️	-
❌	WB3L	BK7231T @ 120 MHz	2 MiB	256 KiB	16 (12 I/O)	✔️	✔️	-
❌	WB3S	BK7231T @ 120 MHz	2 MiB	256 KiB	16 (11 I/O)	✔️	✔️	-
❌	WB3S-IPEX	BK7231T @ 120 MHz	2 MiB	256 KiB	16 (11 I/O)	✔️	✔️	-
❌	WB8P	BK7231T @ 120 MHz	2 MiB	256 KiB	10 (8 I/O)	✔️	✔️	-
❌	WBLC5	BK7231T @ 120 MHz	2 MiB	256 KiB	6 (3 I/O)	✔️	✔️	-
❌	WBLC9	BK7231T @ 120 MHz	2 MiB	256 KiB	8 (6 I/O)	✔️	✔️	-
❌	CB1S	BK7231N @ 120 MHz	2 MiB	256 KiB	18 (11 I/O)	✔️	✔️	-
❌	CB2L	BK7231N @ 120 MHz	2 MiB	256 KiB	7 (5 I/O)	✔️	✔️	-
❌	CB2S	BK7231N @ 120 MHz	2 MiB	256 KiB	11 (8 I/O)	✔️	✔️	-
❌	CB3L	BK7231N @ 120 MHz	2 MiB	256 KiB	16 (11 I/O)	✔️	✔️	-
❌	CB3S	BK7231N @ 120 MHz	2 MiB	256 KiB	22 (14 I/O)	✔️	✔️	-
❌	CB3S-NL	BK7231NL (?) @ 120 MHz	2 MiB	256 KiB	22 (14 I/O)	✔️	✔️	-
❌	CB3SE	BK7231N @ 120 MHz	2 MiB	256 KiB	22 (17 I/O)	✔️	✔️	-
❌	CB8P	BK7231N @ 120 MHz	2 MiB	256 KiB	10 (8 I/O)	✔️	✔️	-
❌	CBLC5	BK7231N @ 120 MHz	2 MiB	256 KiB	6 (3 I/O)	✔️	✔️	-
❌	CBLC9	BK7231N @ 120 MHz	2 MiB	256 KiB	8 (6 I/O)	✔️	✔️	-
❌	CBU	BK7231N @ 120 MHz	2 MiB	256 KiB	21 (18 I/O)	✔️	✔️	-
❌	CBU-IPEX	BK7231N @ 120 MHz	2 MiB	256 KiB	21 (18 I/O)	✔️	✔️	-
❌	CBU-NL	BK7231N (?) @ 120 MHz	2 MiB	256 KiB	21 (18 I/O)	✔️	✔️	-
❌	WR1	RTL8710BN @ 125 MHz	1 MiB	256 KiB	18 (11 I/O)	✔️	❌	-
❌	WR1-IPEX	RTL8710BN @ 125 MHz	1 MiB	256 KiB	18 (11 I/O)	✔️	❌	-
❌	WR1E	RTL8710BN @ 125 MHz	2 MiB	256 KiB	18 (11 I/O)	✔️	❌	-
❌	WR2	RTL8710BN @ 125 MHz	2 MiB	256 KiB	11 (8 I/O)	✔️	❌	-
❌	WR2E	RTL8710BN @ 125 MHz	2 MiB	256 KiB	11 (8 I/O)	✔️	❌	-
❌	WR2L	RTL8710BX @ 62.5 MHz	2 MiB	256 KiB	7 (5 I/O)	✔️	❌	-
❌	WR2LE	RTL8710BX @ 62.5 MHz	2 MiB	256 KiB	7 (5 I/O)	✔️	❌	-
`wr3`	WR3	RTL8710BN @ 125 MHz	2 MiB	256 KiB	16 (12 I/O)	✔️	❌	`realtek-ambz`
❌	WR3E	RTL8710BN @ 125 MHz	2 MiB	256 KiB	16 (12 I/O)	✔️	❌	-
❌	WR3L	RTL8710BX @ 125 MHz (?)	2 MiB	256 KiB	16 (12 I/O)	✔️	❌	-
❌	WR3LE	RTL8710BX @ 62.5 MHz	2 MiB	256 KiB	16 (12 I/O)	✔️	❌	-
❌	WR3N	RTL8710BN @ 125 MHz	2 MiB	256 KiB	16 (10 I/O)	✔️	❌	-
❌	WR4	RTL8710BN @ 125 MHz	1 MiB	256 KiB	16 (12 I/O)	✔️	❌	-
❌	WR5E	RTL8710BX @ 62.5 MHz	2 MiB	256 KiB	15 (12 I/O)	✔️	❌	-
❌	WR6-H	RTL8710BN @ 125 MHz	2 MiB	256 KiB	18 (12 I/O)	✔️	❌	-
❌	WR6	RTL8710BN @ 125 MHz	2 MiB	256 KiB	18 (12 I/O)	✔️	❌	-
❌	WRG1	RTL8711AM @ 166 MHz	4 MiB	2048 KiB	25 (20 I/O)	✔️	❌	-
❌	XR1	XR809 @ 160 MHz	2 MiB	384 KiB	18 (11 I/O)	✔️	❌	-
❌	XR1-IPEX	XR809 @ 160 MHz	2 MiB	384 KiB	18 (11 I/O)	✔️	❌	-
❌	XR3	XR809 @ 160 MHz	2 MiB	384 KiB	22 (17 I/O)	✔️	❌	-
❌	WE1S	ESP8266EX @ 80/160 MHz	2 MiB	36 KiB	18 (11 I/O)	✔️	❌	-
❌	WE2L	ESP8285 @ 80/160 MHz	1 MiB	50 KiB	7 (5 I/O)	✔️	❌	-
❌	WE2S	ESP8285 @ 80/160 MHz	1 MiB	50 KiB	11 (8 I/O)	✔️	❌	-
❌	WE3L	ESP8266 @ 80/160 MHz	2 MiB	50 KiB	16 (12 I/O)	✔️	❌	-
❌	WE3S	ESP8266 @ 80/160 MHz	2 MiB	50 KiB	16 (12 I/O)	✔️	❌	-
❌	WE3SE	ESP32 @ 240 MHz	4 MiB	520 KiB	22 (17 I/O)	✔️	✔️	-
❌	WE5P	ESP8266 @ 80/160 MHz	1 MiB	50 KiB	15 (11 I/O)	✔️	❌	-

* Only modules featuring at least Wi-Fi. WBR, JWBR, CR, (TY)JW and (TY)LC Series are not included here

** I/O count includes GPIOs, ADCs, PWM outputs and UART, but doesn't count CEN/RST and power pins.

Project structure

arduino/
├─ <platform name>/				Arduino Core for specific platform
│  ├─ cores/						Core files
│  ├─ libraries/					Supported built-in libraries
boards/
├─ <board name>/				Board-specific code
│  ├─ variant.cpp					Arduino variant initialization
│  ├─ variant.h						Arduino variant pin configs
├─ <board name>.json			PlatformIO board description
builder/
├─ frameworks/					Framework builders for PlatformIO
│  ├─ <platform name>-sdk.py		Vanilla SDK build system
│  ├─ <platform name>-arduino.py	Arduino Core build system
├─ main.py						Main PlatformIO builder
fixups/
├─ <platform name>/				Code fix-ups to replace SDK parts
platform/
├─ <platform name>/				Other platform-specific files
│  ├─ bin/							Binary blobs (bootloaders, etc.)
│  ├─ ld/							Linker scripts
tools/
├─ <tool name>/					Tools used during the build
platform.json				PlatformIO manifest
platform.py					Custom PlatformIO script

Platforms

A list of platforms currently available in this project.

Platform name	Supported MCU(s)	Arduino Core	Source SDK (PIO framework)
`realtek-ambz`	Realtek AmebaZ SoC (`RTL87xxB`)	✔️	`framework-realtek-amb1` (amb1_sdk)

Realtek Ameba

The logic behind naming of Realtek chips and their series took me some time to figure out:

RTL8xxxA - Ameba1/Ameba Series
RTL8xxxB - AmebaZ Series
RTL8xxxC - AmebaZ2/ZII Series
RTL8xxxD - AmebaD Series

As such, there are numerous CPUs with the same numbers but different series, which makes them require different code and SDKs.

RTL8195AM
RTL8710AF (found in amb1_arduino)
RTL8711AM
RTL8710BN
RTL8710BX (found in Tuya product pages)
RTL8710B? (found in amb1_sdk)
RTL8711B? (found in amb1_sdk)
RTL8710CM
RTL8722CSM (found in ambd_arduino)
RTL8720DN (found in ambd_arduino)
RTL8721DM
RTL8722DM (found in ambd_arduino)
and probably many more

Different Ameba series are not compatible with each other. Apparently, there isn't a public SDK for AmebaZ that can support C++ properly (yet).

Arduino Core support status

Note: this list will probably change with each functionality update.

	`realtek-ambz`
Core functions	✔️
GPIO/PWM/IRQ	✔️/❓/✔️
Analog input	❓
UART I/O	✔️
Flash I/O	❓
LIBRARIES
SPI	❌
SPIFFS	❌
Wire	❌
BLE	-
Wi-Fi	❌
HTTP	❌
NTP	❌
OTA	❌
MDNS	❌
MQTT	❌
SD	❌

Legend:

✔️ working
❗ broken
❓ untested
❌ not implemented (yet?)
- not applicable