Re: CP4 Firmware Upgrade Failure

Jack Huerkamp


Yes a typo. I did try

So I am still at a loss as to why I could not upgrade the CP4 firmware. I am still at the original version that shipped with the unit.

Yours truly,


Jack Huerkamp
Jack's Astro Accessories, LLC
38388 Pine Street
Pearl River, LA 70452-5192

-----Original Message-----
From: <> On Behalf Of Ray Gralak
Sent: Sunday, April 26, 2020 4:16 PM
Subject: Re: [ap-gto] CP4 Firmware Upgrade Failure

Hi Jack,
Maybe that's just a typo but I think the IP address should start with 169, not 168.

-Ray Gralak
Author of APCC (Astro-Physics Command Center):
Author of PEMPro V3: Author of Astro-Physics V2 ASCOM Driver:

-----Original Message-----
From: [] On Behalf
Of Jack Huerkamp
Sent: Sunday, April 26, 2020 2:02 PM
Subject: [ap-gto] CP4 Firmware Upgrade Failure

I found my Astro Physics username and password. I downloaded the
latest CP4 firmware package and unzipped the contents into a folder on
my desktop I printed out the installation instructions and I got as far as "Determine Your IP Address"

I tried three different CAT6 cables connected to the Ethernet port on
the CR4 and to my computer. Since my serial number is CP4-0109, I
calculated that the IP address would be:

I disconnected the keypad from the CR4 and I also disconnected the
Serial connection to the top DB9 connection (I connect to the mount
via a Serial to USB on to the computer.) I left the power cable, the CAT6 cable and the Wye Motor cable connected to the CP4.

Since I have APCC Standard (latest version), I tried starting it to
get/verify the IP address. When I selected TCP LAN/WiFi or UDP LAN/WiFI, I got an invalid V Chip error.

I closed APCC and tried using Edge, Mozilla and MX5 browsers to access In all cases the browser timed out.

So now I cannot get a browser to recognize the IP address of the CP4.

Now what?

Can I remove the VP4 from the mount, bring it into the house, power it
up and try connecting it to my computer with a short CAT6 cable to update the firmware?

Yours truly,

Jack Huerkamp

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