I’ve recently bought a QNAP nas and wanted to make a serial cable for it. The Debian QNAP guru Martin Michlmayr informed me that the connector used is a JST PHR-4. So I ordered some connectors and pins. The second part needed was a ttl-serial convertor. The cheapest solution is a regular old GSM data-cable, I bought 4 Siemens C/S/M 25-45 cables. The pinout required some research, but I settled on:
- GND – Black
- RX – Yellow
- VCC – Red
- TX – Green
And lo and behold it worked first time round:
Port /dev/ttyS1
__ __ _ _
| \/ | __ _ _ ____ _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| | | | (_| | | \ V / __/ | |
|_| |_|\__,_|_| \_/ \___|_|_|
_ _ ____ _
| | | | | __ ) ___ ___ | |_
| | | |___| _ \ / _ \ / _ \| __|
| |_| |___| |_) | (_) | (_) | |_
\___/ |____/ \___/ \___/ \__| ** LOADER **
** MARVELL BOARD: DB-88F6281A-BP LE
U-Boot 1.1.4 (Feb 9 2009 - 11:13:32) Marvell version: 3.4.4
U-Boot code: 00600000 -> 0067FFF0 BSS: -> 00690DCC
Soc: 88F6281 A0 (DDR2)
CPU running @ 1200Mhz L2 running @ 400Mhz
SysClock = 400Mhz , TClock = 200Mhz
DRAM CAS Latency = 5 tRP = 5 tRAS = 18 tRCD=6
DRAM CS[0] base 0x00000000 size 256MB
DRAM CS[1] base 0x10000000 size 256MB
DRAM Total size 512MB 16bit width
[16384kB@f8000000] Flash: 16 MB
Addresses 8M - 0M are saved for the U-Boot usage.
Mem malloc Initialization (8M - 7M): Done
CPU : Marvell Feroceon (Rev 1)
Streaming disabled