diff --git a/boards/wr3.json b/boards/wr3.json
new file mode 100644
index 0000000..0b9985e
--- /dev/null
+++ b/boards/wr3.json
@@ -0,0 +1,18 @@
+{
+	"build": {
+		"mcu": "rtl8710bn",
+		"f_cpu": "125000000L",
+		"amb_ota1_offset": "0x0800B000",
+		"amb_ota2_offset": "0x080D0000"
+	},
+	"frameworks": [
+		"realtek-ambz-sdk"
+	],
+	"upload": {
+		"maximum_size": 2097152,
+		"maximum_ram_size": 262144
+	},
+	"name": "WR3 Wi-Fi Module",
+	"url": "",
+	"vendor": "Tuya"
+}
diff --git a/builder/frameworks/realtek-ambz-sdk.py b/builder/frameworks/realtek-ambz-sdk.py
new file mode 100644
index 0000000..4f206e6
--- /dev/null
+++ b/builder/frameworks/realtek-ambz-sdk.py
@@ -0,0 +1,586 @@
+from os.path import join, isdir
+from SCons.Script import DefaultEnvironment, Builder
+
+env = DefaultEnvironment()
+platform = env.PioPlatform()
+board = env.BoardConfig()
+
+SDK_DIR = platform.get_package_dir("framework-realtek-amb1")
+assert isdir(SDK_DIR)
+
+ota1_offset = board.get("build.amb_ota1_offset")
+ota2_offset = board.get("build.amb_ota2_offset")
+
+# Firmware name
+if env.get("PROGNAME", "program") == "program":
+    env.Replace(PROGNAME="firmware")
+env.Replace(
+    PROGSUFFIX=".elf",
+)
+
+# Outputs
+env.Replace(
+    IMG_FW="image2_all_ota1.bin",
+    IMG_OTA="ota_all.bin",
+)
+
+# Tools
+# fmt: off
+TOOL_DIR = join(SDK_DIR, "component", "soc", "realtek", "8711b", "misc", "iar_utility", "common", "tools")
+# fmt: on
+assert isdir(SDK_DIR)
+env.Replace(
+    PICK=join(TOOL_DIR, "pick"),
+    PAD=join(TOOL_DIR, "pad"),
+    CHECKSUM=join(TOOL_DIR, "checksum"),
+    OTA=join(TOOL_DIR, "ota"),
+)
+
+# Flags
+env.Replace(
+    CCFLAGS=[
+        "-mcpu=cortex-m4",
+        "-mthumb",
+        "-mfloat-abi=hard",
+        "-mfpu=fpv4-sp-d16",
+        "-g2",
+        "-w",
+        "-O2",
+        "-Wno-pointer-sign",
+        "-fno-common",
+        "-fmessage-length=0",
+        "-ffunction-sections",
+        "-fdata-sections",
+        "-fomit-frame-pointer",
+        "-fno-short-enums",
+        "-std=gnu99",
+        "-fsigned-char",
+    ],
+    CPPDEFINES=[
+        "M3",
+        "CONFIG_PLATFORM_8711B",
+        ("F_CPU", "166000000L"),
+    ],
+    LINKFLAGS=[
+        "-mcpu=cortex-m4",
+        "-mthumb",
+        "-mfloat-abi=hard",
+        "-mfpu=fpv4-sp-d16",
+        "-g",
+        "--specs=nano.specs",
+        "-nostartfiles",
+        "-Wl,-Map=" + join("$BUILD_DIR", "${PROGNAME}.map"),
+        "-Os",
+        "-Wl,--gc-sections",
+        "-Wl,--cref",
+        "-Wl,--entry=gImage2EntryFun0",
+        "-Wl,--no-enum-size-warning",
+        "-Wl,--no-wchar-size-warning",
+        "-Wl,-wrap,malloc",
+        "-Wl,-wrap,free",
+        "-Wl,-wrap,realloc",
+        "-Wl,-wrap,rom_psk_CalcGTK",
+        "-Wl,-wrap,rom_psk_CalcPTK",
+        "-Wl,-wrap,CalcMIC",
+        "-Wl,-wrap,CheckMIC",
+        "-Wl,-wrap,aes_80211_encrypt",
+        "-Wl,-wrap,aes_80211_decrypt",
+        "-Wl,-wrap,DecGTK",
+    ],
+)
+
+# Includes
+env.Append(
+    CPPPATH=[
+        # fmt: off
+        join(SDK_DIR, "project", "realtek_amebaz_va0_example", "inc"),
+        join(SDK_DIR, "component", "os", "freertos"),
+        join(SDK_DIR, "component", "os", "freertos", "freertos_v8.1.2", "Source", "include"),
+        join(SDK_DIR, "component", "os", "freertos", "freertos_v8.1.2", "Source", "portable", "GCC", "ARM_CM4F"),
+        join(SDK_DIR, "component", "os", "os_dep", "include"),
+        join(SDK_DIR, "component", "common", "api", "network", "include"),
+        join(SDK_DIR, "component", "common", "api"),
+        join(SDK_DIR, "component", "common", "api", "at_cmd"),
+        join(SDK_DIR, "component", "common", "api", "platform"),
+        join(SDK_DIR, "component", "common", "api", "wifi"),
+        join(SDK_DIR, "component", "common", "api", "wifi", "rtw_wpa_supplicant", "src"),
+        join(SDK_DIR, "component", "common", "api", "wifi", "rtw_wowlan"),
+        join(SDK_DIR, "component", "common", "api", "wifi", "rtw_wpa_supplicant", "wpa_supplicant"),
+        join(SDK_DIR, "component", "common", "application"),
+        join(SDK_DIR, "component", "common", "application", "mqtt", "MQTTClient"),
+        join(SDK_DIR, "component", "common", "application", "mqtt", "MQTTPacket"),
+        join(SDK_DIR, "component", "common", "example"),
+        join(SDK_DIR, "component", "common", "example", "wlan_fast_connect"),
+        join(SDK_DIR, "component", "common", "drivers", "modules"),
+        join(SDK_DIR, "component", "common", "drivers", "sdio", "realtek", "sdio_host", "inc"),
+        join(SDK_DIR, "component", "common", "drivers", "inic", "rtl8711b"),
+        join(SDK_DIR, "component", "common", "drivers", "usb_class", "device"),
+        join(SDK_DIR, "component", "common", "drivers", "usb_class", "device", "class"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "include"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "src", "osdep"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "src", "hci"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "src", "hal"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "src", "hal", "rtl8711b"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "src", "hal", "OUTSRC"),
+        join(SDK_DIR, "component", "common", "drivers", "wlan", "realtek", "wlan_ram_map", "rom"),
+        join(SDK_DIR, "component", "common", "file_system"),
+        join(SDK_DIR, "component", "common", "network"),
+        join(SDK_DIR, "component", "common", "network", "lwip", "lwip_v1.4.1", "port", "realtek", "freertos"),
+        join(SDK_DIR, "component", "common", "network", "lwip", "lwip_v1.4.1", "src", "include"),
+        join(SDK_DIR, "component", "common", "network", "lwip", "lwip_v1.4.1", "src", "include", "lwip"),
+        join(SDK_DIR, "component", "common", "network", "lwip", "lwip_v1.4.1", "src", "include", "ipv4"),
+        join(SDK_DIR, "component", "common", "network", "lwip", "lwip_v1.4.1", "port", "realtek"),
+        join(SDK_DIR, "component", "common", "network", "ssl", "polarssl-1.3.8", "include"),
+        join(SDK_DIR, "component", "common", "network", "ssl", "ssl_ram_map", "rom"),
+        join(SDK_DIR, "component", "common", "test"),
+        join(SDK_DIR, "component", "common", "utilities"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "app", "monitor", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "cmsis"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "cmsis", "device"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "fwlib"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "fwlib", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "fwlib", "ram_lib", "crypto"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "fwlib", "rom_lib"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "os_dep", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "std_lib", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "std_lib", "libc", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "std_lib", "libc", "rom", "string"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "std_lib", "libgcc", "rtl8195a", "include"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "swlib", "rtl_lib"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "misc"),
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "misc", "os"),
+        join(SDK_DIR, "component", "common", "mbed", "api"),
+        join(SDK_DIR, "component", "common", "mbed", "hal"),
+        join(SDK_DIR, "component", "common", "mbed", "hal_ext"),
+        join(SDK_DIR, "component", "common", "mbed", "targets", "cmsis"),
+        join(SDK_DIR, "component", "common", "mbed", "targets", "hal", "rtl8711b"),
+        join(SDK_DIR, "project", "realtek_8195a_gen_project", "rtl8195a", "sw", "lib", "sw_lib", "mbed", "api"),
+        join(SDK_DIR, "component", "common", "application", "mqtt", "MQTTClient"),
+        join(SDK_DIR, "component", "common", "network", "websocket"),
+        # fmt: on
+    ],
+)
+
+# Sources - from SDK project/realtek_amebaz_va0_example/GCC-RELEASE/application.mk
+# - "console" is disabled as it introduces build error, and is generally useless
+# - "utilities example" are also not really needed
+sources = [
+    # fmt: off
+    # app uart_adapter
+    "+<" + SDK_DIR +"/component/common/application/uart_adapter/uart_adapter.c>",
+    # cmsis
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/cmsis/device/app_start.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/startup.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/cmsis/device/system_8195a.c>",
+    # console
+    # "+<" + SDK_DIR +"/component/common/api/at_cmd/atcmd_lwip.c>",
+    # "+<" + SDK_DIR +"/component/common/api/at_cmd/atcmd_sys.c>",
+    # "+<" + SDK_DIR +"/component/common/api/at_cmd/atcmd_wifi.c>",
+    # "+<" + SDK_DIR +"/component/common/api/at_cmd/log_service.c>",
+    # "+<" + SDK_DIR +"/component/soc/realtek/8711b/app/monitor/ram/low_level_io.c>",
+    # "+<" + SDK_DIR +"/component/soc/realtek/8711b/app/monitor/ram/monitor.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/app/monitor/ram/rtl_consol.c>",
+    # "+<" + SDK_DIR +"/component/soc/realtek/8711b/app/monitor/ram/rtl_trace.c>",
+    # network api wifi rtw_wpa_supplicant
+    "+<" + SDK_DIR +"/component/common/api/wifi/rtw_wpa_supplicant/wpa_supplicant/wifi_eap_config.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/rtw_wpa_supplicant/wpa_supplicant/wifi_p2p_config.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/rtw_wpa_supplicant/wpa_supplicant/wifi_wps_config.c>",
+    # network api wifi
+    "+<" + SDK_DIR +"/component/common/api/wifi/wifi_conf.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/wifi_ind.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/wifi_promisc.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/wifi_simple_config.c>",
+    "+<" + SDK_DIR +"/component/common/api/wifi/wifi_util.c>",
+    # network api
+    "+<" + SDK_DIR +"/component/common/api/lwip_netconf.c>",
+    # network app
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTClient/MQTTClient.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTConnectClient.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTConnectServer.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTDeserializePublish.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTFormat.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTClient/MQTTFreertos.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTPacket.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTSerializePublish.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTSubscribeClient.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTSubscribeServer.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTUnsubscribeClient.c>",
+    "+<" + SDK_DIR +"/component/common/application/mqtt/MQTTPacket/MQTTUnsubscribeServer.c>",
+    "+<" + SDK_DIR +"/component/common/api/network/src/ping_test.c>",
+    "+<" + SDK_DIR +"/component/common/utilities/ssl_client.c>",
+    "+<" + SDK_DIR +"/component/common/utilities/tcptest.c>",
+    "+<" + SDK_DIR +"/component/common/api/network/src/wlan_network.c>",
+    # network lwip api
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/api_lib.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/api_msg.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/err.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/netbuf.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/netdb.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/netifapi.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/sockets.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/api/tcpip.c>",
+    # network lwip core ipv4
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/autoip.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/icmp.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/igmp.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/inet.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/inet_chksum.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/ip.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/ip_addr.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/ipv4/ip_frag.c>",
+    # network lwip core
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/def.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/dhcp.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/dns.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/init.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/lwip_timers.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/mem.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/memp.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/netif.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/pbuf.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/raw.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/stats.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/sys.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/tcp.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/tcp_in.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/tcp_out.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/core/udp.c>",
+    # network lwip netif
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/src/netif/etharp.c>",
+    # network lwip port
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/port/realtek/freertos/ethernetif.c>",
+    "+<" + SDK_DIR +"/component/common/drivers/wlan/realtek/src/osdep/lwip_intf.c>",
+    "+<" + SDK_DIR +"/component/common/network/lwip/lwip_v1.4.1/port/realtek/freertos/sys_arch.c>",
+    # network - wsclient
+    "+<" + SDK_DIR +"/component/common/network/websocket/wsclient_tls.c>",
+    # network lwip
+    "+<" + SDK_DIR +"/component/common/network/dhcp/dhcps.c>",
+    "+<" + SDK_DIR +"/component/common/network/sntp/sntp.c>",
+    # network polarssl polarssl
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/aesni.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/blowfish.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/camellia.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ccm.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/certs.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/cipher.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/cipher_wrap.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/debug.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ecp_ram.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/entropy.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/entropy_poll.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/error.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/gcm.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/havege.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/md2.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/md4.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/memory_buffer_alloc.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/net.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/padlock.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/pbkdf2.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/pkcs11.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/pkcs12.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/pkcs5.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/pkparse.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/platform.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ripemd160.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ssl_cache.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ssl_ciphersuites.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ssl_cli.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ssl_srv.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/ssl_tls.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/threading.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/timing.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/version.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/version_features.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509_create.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509_crl.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509_crt.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509_csr.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509write_crt.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/x509write_csr.c>",
+    "+<" + SDK_DIR +"/component/common/network/ssl/polarssl-1.3.8/library/xtea.c>",
+    # network polarssl ssl_ram_map
+    "+<" + SDK_DIR +"/component/common/network/ssl/ssl_ram_map/ssl_ram_map.c>",
+    # os freertos portable
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/portable/MemMang/heap_5.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/portable/GCC/ARM_CM4F/port.c>",
+    # "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/portable/IAR/ARM_CM4F/portasm.s>",
+    # os freertos
+    "+<" + SDK_DIR +"/component/os/freertos/cmsis_os.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/croutine.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/event_groups.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_service.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/list.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/queue.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/tasks.c>",
+    "+<" + SDK_DIR +"/component/os/freertos/freertos_v8.1.2/Source/timers.c>",
+    # os osdep
+    "+<" + SDK_DIR +"/component/os/os_dep/device_lock.c>",
+    "+<" + SDK_DIR +"/component/os/os_dep/osdep_service.c>",
+    # peripheral api
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/analogin_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/dma_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/efuse_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/flash_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/gpio_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/gpio_irq_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/i2c_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/i2s_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/nfc_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/pinmap.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/pinmap_common.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/port_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/pwmout_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/rtc_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/serial_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/sleep.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/spi_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/sys_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/timer_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/us_ticker.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/us_ticker_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/wait_api.c>",
+    "+<" + SDK_DIR +"/component/common/mbed/targets/hal/rtl8711b/wdt_api.c>",
+    # peripheral rtl8710b
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/rtl8710b_dsleepcfg.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/rtl8710b_dstandbycfg.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/rtl8710b_intfcfg.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/misc/rtl8710b_ota.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/rtl8710b_pinmapcfg.c>",
+    "+<" + SDK_DIR +"/component/soc/realtek/8711b/fwlib/ram_lib/rtl8710b_sleepcfg.c>",
+    # utilities example
+    # "+<" + SDK_DIR +"/component/common/example/bcast/example_bcast.c>",
+    # "+<" + SDK_DIR +"/component/common/example/dct/example_dct.c>",
+    # "+<" + SDK_DIR +"/component/common/example/eap/example_eap.c>",
+    # "+<" + SDK_DIR +"/component/common/example/example_entry.c>",
+    # "+<" + SDK_DIR +"/component/common/example/get_beacon_frame/example_get_beacon_frame.c>",
+    # "+<" + SDK_DIR +"/component/common/example/high_load_memory_use/example_high_load_memory_use.c>",
+    # "+<" + SDK_DIR +"/component/common/example/http_client/example_http_client.c>",
+    # "+<" + SDK_DIR +"/component/common/example/httpc/example_httpc.c>",
+    # "+<" + SDK_DIR +"/component/common/example/httpd/example_httpd.c>",
+    # "+<" + SDK_DIR +"/component/common/example/http_download/example_http_download.c>",
+    # "+<" + SDK_DIR +"/component/common/example/mcast/example_mcast.c>",
+    # "+<" + SDK_DIR +"/component/common/example/mdns/example_mdns.c>",
+    # "+<" + SDK_DIR +"/component/common/example/mqtt/example_mqtt.c>",
+    # "+<" + SDK_DIR +"/component/common/example/nonblock_connect/example_nonblock_connect.c>",
+    # "+<" + SDK_DIR +"/component/common/example/rarp/example_rarp.c>",
+    # "+<" + SDK_DIR +"/component/common/example/sntp_showtime/example_sntp_showtime.c>",
+    # "+<" + SDK_DIR +"/component/common/example/socket_select/example_socket_select.c>",
+    # "+<" + SDK_DIR +"/component/common/example/socket_tcp_trx/example_socket_tcp_trx_1.c>",
+    # "+<" + SDK_DIR +"/component/common/example/socket_tcp_trx/example_socket_tcp_trx_2.c>",
+    # "+<" + SDK_DIR +"/component/common/example/ssl_download/example_ssl_download.c>",
+    # "+<" + SDK_DIR +"/component/common/example/ssl_server/example_ssl_server.c>",
+    # "+<" + SDK_DIR +"/component/common/example/tcp_keepalive/example_tcp_keepalive.c>",
+    # "+<" + SDK_DIR +"/component/common/example/uart_atcmd/example_uart_atcmd.c>",
+    # "+<" + SDK_DIR +"/component/common/example/wifi_mac_monitor/example_wifi_mac_monitor.c>",
+    # "+<" + SDK_DIR +"/component/common/example/wlan_fast_connect/example_wlan_fast_connect.c>",
+    # "+<" + SDK_DIR +"/component/common/example/wlan_scenario/example_wlan_scenario.c>",
+    # "+<" + SDK_DIR +"/component/common/example/websocket/example_wsclient.c>",
+    # "+<" + SDK_DIR +"/component/common/example/xml/example_xml.c>",
+    # "+<" + SDK_DIR +"/component/common/example/uart_firmware_update/example_uart_update.c>",
+    # network - httpc
+    "+<" + SDK_DIR +"/component/common/network/httpc/httpc_tls.c>",
+    # network - httpd
+    "+<" + SDK_DIR +"/component/common/network/httpd/httpd_tls.c>",
+    # utilities
+    "+<" + SDK_DIR +"/component/common/utilities/cJSON.c>",
+    "+<" + SDK_DIR +"/component/common/utilities/http_client.c>",
+    "+<" + SDK_DIR +"/component/common/utilities/uart_socket.c>",
+    "+<" + SDK_DIR +"/component/common/utilities/xml.c>",
+    # fmt: on
+]
+
+# Libs & linker config
+env.Append(
+    LIBPATH=[
+        # fmt: off
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "misc", "bsp", "lib", "common", "GCC"),
+        # linker script path
+        join(SDK_DIR, "project", "realtek_amebaz_va0_example", "GCC-RELEASE"),
+        # fmt: on
+    ],
+    LIBS=[
+        "_platform",
+        "_wlan",
+        "_wps",
+        "_p2p",
+        "_dct",
+        "_rtlstd",
+        "m",
+        "c",
+        "nosys",
+        "gcc",
+        "_websocket",
+        "_http",
+        "_mdns",
+    ],
+)
+env.Replace(
+    LDSCRIPT_PATH=[
+        # fmt: off
+        join(SDK_DIR, "project", "realtek_amebaz_va0_example", "GCC-RELEASE", "rlx8711B-symbol-v02-img2_xip1.ld"),
+        # fmt: on
+    ],
+)
+
+# Misc options
+env.Replace(
+    SIZEPROGREGEXP=r"^(?:\.ram_image2\.entry|\.ram_image2\.text|\.ram_image2\.data|\.xip_image2\.text)\s+([0-9]+).*",
+    SIZEDATAREGEXP=r"^(?:\.ram_image2\.entry|\.ram_image2\.data|\.ram_image2\.bss|\.ram_image2\.skb\.bss)\s+([0-9]+).*",
+    SIZECHECKCMD="$SIZETOOL -A -d $SOURCES",
+    SIZEPRINTCMD="$SIZETOOL -B -d $SOURCES",
+)
+
+# Image conversion
+def pick_tool(target, source, env):
+    sections = [
+        "__ram_image2_text_start__",
+        "__ram_image2_text_end__",
+        "__xip_image2_start__",
+    ]
+    addrs = [None] * len(sections)
+    with open(env.subst("${BUILD_DIR}/${PROGNAME}.nmap")) as f:
+        for line in f:
+            for i, section in enumerate(sections):
+                if section not in line:
+                    continue
+                addrs[i] = line.split()[0]
+    files = [
+        join("$BUILD_DIR", "ram_2.r.bin"),  # RAM image with padding
+        join("$BUILD_DIR", "ram_2.bin"),  # RAM image, stripped
+        join("$BUILD_DIR", "ram_2.p.bin"),  # RAM image, stripped, with header
+        join("$BUILD_DIR", "xip_image2.bin"),  # raw firmware image
+        join("$BUILD_DIR", "xip_image2.p.bin"),  # firmware with header
+    ]
+    commands = [
+        f"$PICK 0x{addrs[0]} 0x{addrs[1]} {files[0]} {files[1]} raw",
+        f"$PICK 0x{addrs[0]} 0x{addrs[1]} {files[1]} {files[2]}",
+        f"$PICK 0x{addrs[2]} 0x{addrs[2]} {files[3]} {files[4]}",
+    ]
+    for command in commands:
+        status = env.Execute("@" + command + " > " + join("$BUILD_DIR", "pick.txt"))
+        if status:
+            return status
+
+
+def concat_xip_ram(target, source, env):
+    with open(env.subst("${BUILD_DIR}/xip_image2.p.bin"), "rb") as f:
+        xip = f.read()
+    with open(env.subst("${BUILD_DIR}/ram_2.p.bin"), "rb") as f:
+        ram = f.read()
+    with open(env.subst("${BUILD_DIR}/${IMG_FW}"), "wb") as f:
+        f.write(xip)
+        f.write(ram)
+
+
+def checksum_img(target, source, env):
+    source = join("$BUILD_DIR", "$IMG_FW")
+    status = env.Execute(f"@$CHECKSUM {source}")
+    if status:
+        return status
+
+
+def package_ota(target, source, env):
+    source = join("$BUILD_DIR", "$IMG_FW")
+    target = join("$BUILD_DIR", "$IMG_OTA")
+    status = env.Execute(
+        f"@$OTA {source} {ota1_offset} {source} {ota2_offset} 0x20170111 {target}"
+    )
+    if status:
+        return status
+
+
+env.Append(
+    BUILDERS=dict(
+        BinToObj=Builder(
+            action=" ".join(
+                [
+                    "$OBJCOPY",
+                    "-I binary",
+                    "-O elf32-littlearm",
+                    "-B arm",
+                    "$SOURCE",
+                    "$TARGET",
+                ],
+            ),
+        )
+    ),
+)
+commands = [
+    (
+        "${PROGNAME}.nmap",
+        [
+            "$NM",
+            "$SOURCE",
+            "> $BIN",
+        ],
+    ),
+    (
+        "ram_2.r.bin",
+        [
+            "$OBJCOPY",
+            "-j .ram_image2.entry",
+            "-j .ram_image2.data",
+            "-j .ram_image2.bss",
+            "-j .ram_image2.skb.bss",
+            "-j .ram_heap.data",
+            "-O binary",
+            "$SOURCE",
+            "$BIN",
+        ],
+    ),
+    (
+        "xip_image2.bin",
+        [
+            "$OBJCOPY",
+            "-j .xip_image2.text",
+            "-O binary",
+            "$SOURCE",
+            "$BIN",
+        ],
+    ),
+    (
+        "rdp.bin",
+        [
+            "$OBJCOPY",
+            "-j .ram_rdp.text",
+            "-O binary",
+            "$SOURCE",
+            "$BIN",
+        ],
+    ),
+]
+actions = [
+    env.VerboseAction(
+        " ".join(command).replace("$BIN", join("$BUILD_DIR", target)),
+        f"Generating {target}",
+    )
+    for target, command in commands
+]
+actions.append(env.VerboseAction(pick_tool, "Wrapping binary images"))
+actions.append(env.VerboseAction(concat_xip_ram, "Packaging firmware image - $IMG_FW"))
+# actions.append(env.VerboseAction(checksum_img, "Generating checksum"))
+actions.append(env.VerboseAction(package_ota, "Packaging OTA image - $IMG_OTA"))
+actions.append(env.VerboseAction("true", f"- OTA1 flash offset: {ota1_offset}"))
+actions.append(env.VerboseAction("true", f"- OTA2 flash offset: {ota2_offset}"))
+
+# SDK library target
+target_sdk = env.BuildLibrary(join("$BUILD_DIR", "SDK"), SDK_DIR, sources)
+target_boot = env.StaticLibrary(
+    join("$BUILD_DIR", "boot_all"),
+    env.BinToObj(
+        join("$BUILD_DIR", "boot_all.o"),
+        # fmt: off
+        join(SDK_DIR, "component", "soc", "realtek", "8711b", "misc", "bsp", "image", "boot_all.bin"),
+        # fmt: on
+    ),
+)
+env.Prepend(LIBS=[target_sdk, target_boot])
+
+# Main firmware binary builder
+env.Append(
+    BUILDERS=dict(
+        DumpFirmwareBinary=Builder(action=actions),
+    ),
+)