CPII Firmware downgrade possible ??

[chansen1953]

Hi guys,

I have two 600 Helis, ( basically HK600GT with mostly ALign parts !!) and use a DX7 as my man TX.

Heli #1 has flybar head and AR7200 + CPII and it flies fine. I am most at home with this config flight chacteristics and have recently come back to fly helis again after a 7 month break. I was at a sports flyer level, and had mastered a few flips, loops and rolls and was starting to try more advanced 3d moves, when I had a series of write-off crashes, and went to planks to save money !!

The other has flybarless head and AR7200BX receiver, and whilst if flies ok, I am much too nervous and have had only a handful of flights. I do not feel comfortable flying this heli, as it feels different and I am too scared to try anything more than a slow fly-round.. I cannot fit CPII to this machine because of the AR7200BX.

I have a spare CPII kit, which I originally had before I tried out the AR7200BX. During the last few months, I have upgraded this CPII to the HD version, but had lots of troubles trying to get it to work. I eventually gave up and refitted the standard CPII to my daily flyer.

I would like to convert Heli#2 ( flybarless) back to flybarred ( I have a spare flybar head ) and put standard CPII with AR7200 Rx on ths to make TWO identical helis, so I can get lots more flying time and restart my 3d training and 3d skills.

I my go and move to flybarless later on, but I would like to get both helis to same so I can fly them mre hours.

My big question is, how do I DOWNGRADE the HD firmware to V2.2 prior to the HD module (V2.37 ?) so I can fly them with both the same CPII firmware versions

I only upgraded one of the CPII to the HD version.

[chansen1953]

I have just tried to run firmware update on the CPII with the V2.43 firmwar.. I tried to update to 2.04, which is the version prior to HD

I get the following error message in the Firmware updater log..

Starting Firmware Programming on port COM4 0mS 0mS
Send Password 115.2Kbs 437mS 437mS
characters read = 202 63mS 500mS
RX(1) = (112) 0mS 500mS
RX(2) = (112) 0mS 500mS
RX(98) = (112) 0mS 500mS
RX(99) = (112) 0mS 500mS
RX(100) = (80) 0mS 500mS
RX(101) = (32) 0mS 500mS
RX(102) = (32) 0mS 500mS
Bad Product Code Abort = True 0mS 500mS

is there any way to blow away this firmware and re-burn with the V2.04 ??

[nightflyr]

I would suggest you contact FMA Direct and make an inquiry ....

I think it can be done but not 100% sure, but if it can they would be your best bet.
Contact Howard and tell him Rich (nightflyr) from HF sent you, he should be able to contact the software engineer

[chansen1953]

ok, so I have solved the problem... The CPII HD firmware HAS BEEN REMOVED !! it seems it is possible.. even though the FMA site say you cannot go back... !!

I simply connected the CPII unit up to a battery, put the FIUM#3 onto the ACCS port and used the firmware updated to update from V2.41 back to V2.04.. it took about 3 minutes and several retries , but it seems to have been successful, as it now shows the V2.04 when you connect via the IR port to do a new setup.

The heli seems to be way off in collective/level however, So I will now remove the CPII and perform a complete setup and alignment first, plus a quick test on the LazySusan, to confirm the blade alignment and collective is level.

thanks for listening anyway guys !!