Identifying RS232 Port on Dahua Cam

[MeisterGN006 0]

Hello Gents,

 

I attempted my downgrade my 3mpx dahua ip camera from system version 2.420 to 2.210 due to some inconsistencies in MD with the NVR and it appears to have bricked. I wanted to use the RS232 port to try and recover it using iTuneDVR's instructions from "IP Camera RS232 Operation instructor" PDF file, but am completely unsure which port on the camera is considered the RS232 port. Here are the pics I was able to grab:

 

Bottom of the PCB

 

 

Underside Dials with possible RS232

 

 

Side of PCB

 

 

 

If anyone can help me by pointing out which port is the actual RS232 port that will keep from spending multiple hours trying to use the wrong port and troubleshooting my serial cables and 232 board.

[MaxIcon 0]

Typically, the serial port will be on the main CPU board. The one you have listed as main board looks like the power board to me, between the big power components, and "power" in the board name.

 

Generally, it's a 4 pin port. I'd find the board with the RAM and CPU on it (that's the RAM chip on the pic below; the CPU is on the other side, and is the other big chip in the camera), and see if it's got a 4 pin port that nothing is plugged in to. My guess would be your middle pic, but it's hard to say for sure.

 

One quick check is to measure the pin voltages; one should be 5V or 3V, one should be ground, and the other two will be data.

 

Here's what the serial port on my HFW3300C looks like: