SerComm NA502S

multiple revisions of this device, use caution

abgn+ac (AC1200)
Multiple RF Home Gateway
3rd Party Firmware
dd-wrt	Status Unknown
OpenWrt	Partial Support
Tomato any flavor	Incompatible
Gargoyle	Status Unknown
Platform
Brand • Model • Rev	SerComm NA502S
FCC ID	P27NA502S
Type	IoT Gateway
CPU1 Y	MediaTek MT7621ST
CPU1 Type	MIPS 1004Kc
CPU1 Speed	880 MHz 16-bit
Flash1 Chip	Brand? Model?
Flash1 Size	128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br /> (NAND)
RAM1 Size	256 MiB 268,435,456 B <br />2,097,152 Kib <br />262,144 KiB <br />2,048 Mib <br />0.25 GiB <br />
RAM1 Chip	Brand? Model?
ETH chip1	MediaTek MT7621ST
Ethernet Port Count	1-1GbE-LAN
Wired Standard	IEEE 802.3i/3u/3ab
802dot11 OUI: none specified
Stock bootloader	U-Boot
Expansion IF types	USB 2.0
USB ports	1
USB Hub Compatible	Untested
Power	12 VDC, 2 A
Serial Port (UART)	yes, 3.3V TTL, (57600 8N1)
Other
3rd Party Firmware Support	OpenWrt • (List | Dev | DLs)
Radio 1
Chip1	MediaTek MT7603EN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11b/g/n
802.11n	up to 300 Mbps
802.11g	up to 54 Mbps
802.11b	up to 11 Mbps
WiFi Operating Frequency	2.4 GHz
Radio 2
Chip1	MediaTek MT7662EN
Wireless interface OUI	none specified
Antenna Connector Type	none specified
MIMO status	2x2:2
Wireless Standard	IEEE 802.11a/n/ac
802.11ac	up to 867 Mbps
802.11n	up to 300 Mbps
802.11a	up to 54 Mbps
WiFi Operating Frequency	5 GHz
CPU1 brand Radio1 chip1 brand Radio2 chip1 brand SerComm NA502 MediaTek MediaTek MediaTek SerComm NA502S MediaTek MediaTek MediaTek

For a list of all currently documented MediaTek chipsets with specifications, see MediaTek.

For a list of all currently documented SerComm devices with specifications, see SerComm.

• 300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.),

• 867 Mbps - 2SS 5GHz 802.11ac (80MHz chan.) = AC1200 class

Flashing

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)

Target: ramips
Subtarget: mt7621
Package architecture: mipsel_24kc
Supported Since Commit
Support started version: 22.03.0
Current supported version: fix

Unsupported Functions:
BLE and Audio
WLAN Hardware: MediaTek MT7603EN, MediaTek MT7662EN
Installation method(s):
U-Boot TFTP + serial recovery, see git-commit

git • >>

ramips: Add support for SERCOMM NA502S The SERCOMM NA502s is a smart home gateway manufactured by SERCOMM and sold under different brands (among others, A1 Telekom Austria SmartHome Premium Gateway). It has multi-protocol radio support in addition to LAN and WiFi. Note: BLE and audio are currently unsupported. Specifications -------------- - MT7621ST 880MHz, Single-Core, Dual-Thread - MT7603EN 2.4GHz WiFi - MT7662EN 5GHz WiFi + BLE - 128MiB NAND - 256MiB DDR3 RAM - SD3503 ZWave Controller - EM357 Zigbee Coordinator - Telit UMTS module - Rechargeable battery - speaker and microphone MAC address assignment ---------------------- LAN MAC is read from the config partition, WiFi 2.4GHz is LAN+2 and matches the OEM firmware. WiFi 5GHz with LAN+1 is an educated guess since the OEM firmware does not enable 5GHz WiFi. Installation ------------ Attach serial console, then boot the initramfs image via TFTP. Once inside OpenWrt, run sysupgrade -n with the sysupgrade file. Attention: The device has a dual-firmware design. We overwrite kernel2, since kernel1 contains an automatic recovery image. If you get NAND ECC errors and are stuck with bad eraseblocks, try to erase the mtd partition first with mtd unlock ubi mtd erase ubi This should only be needed once. Signed-off-by: Andreas Böhler