1.28 firmware needed

Steve Carr · Feb 7, 2021

Just a brief look at the flight log suggests the FC is bad.

DoomMeister · Feb 7, 2021

@Kevin788 when is the last time the TH was actually in the air? I am not seeing anything in the past month or more.

Kevin788 · Feb 7, 2021

To be honest could well be October last year, maybe ealier last year

DoomMeister · Feb 7, 2021

The last flight the logs show was on May 20th near an area that looks like a huge greenhouse facility. There was a loss of GPS near the end of the flight and apparently a mishap that errored Motor 4 and caused an emergency shutdown (motors disarmed).

Kevin788 · Feb 7, 2021

Yip that will be the one, green house, shed, stables etc at my home,

Kevin788 · Feb 7, 2021

Kevin788 said:
Yip that will be the one, green house, shed, stables etc at my home,

I spoke with my wife, she said that will be it, she said remember summer last year when you had to ditch it in the sand school! She said with a giggle!!!

DoomMeister · Feb 7, 2021

The long storage of the aircraft may be the issue at this point. Place a fully charged battery in the aircraft and power it on. Let it sit outside if possible, or on a covered patio, or indoors as a last resort. Leave it for about four hours monitoring the battery charge every so often to ensure you don’t harm the battery. This is to start building a charge in the GPS battery. Right now it never gets a good almanac loaded so never goes to GPS Ready.

You don’t have to leave the controller on the entire time. Just power it up every 20 minutes, let it bind, and check the battery voltage. When it gets down to 14.6 volts check to see if you are getting GPS Ready, then power off and remove the battery.

If you have a second battery you can continue the process if necessary. Always let your batteries cool down before charging them again or placing them at storage voltage of 15.2 to 15.4 volts.

Kevin788 · Feb 7, 2021

DoomMeister said:
The long storage of the aircraft may be the issue at this point. Place a fully charged battery in the aircraft and power it on. Let it sit outside if possible, or on a covered patio, or indoors as a last resort. Leave it for about four hours monitoring the battery charge every so often to ensure you don’t harm the battery. This is to start building a charge in the GPS battery. Right now it never gets a good almanac loaded so never goes to GPS Ready.

You don’t have to leave the controller on the entire time. Just power it up every 20 minutes, let it bind, and check the battery voltage. When it gets down to 14.6 volts check to see if you are getting GPS Ready, then power off and remove the battery.

If you have a second battery you can continue the process if necessary. Always let your batteries cool down before charging them again or placing them at storage voltage of 15.2 to 15.4 volts.

Ok I will leave at patio window, I will let you know just after 10pm,,, thanks

Kevin788 · Feb 7, 2021

Hello,,, 4hrs later, H is seeing a good amount of sats but still not acquired gps, I thinks that confirms what we all think.. FC, does anyone have any idea what goes wrong on the flight controller? Strange as the unit function, it can be re flashed with new software but not play? Odd things! Well thanks you guys for all your help, I will order up an FC tomorrow.

DoomMeister · Feb 7, 2021

Looks that way. What a shame.

Steve Carr · Feb 7, 2021

Kevin788 said:
what goes wrong on the flight controller?

Most of the those that I've seen fail were exposed to excessive heat. Perhaps in the trunk of a car parked in the sun on a hot day. But I'm sure there are other factors that could cause a failure. No one has found a way to correct a failed FC to my knowledge.

h-elsner · Feb 8, 2021

I saw one intersting statement that say after 4h outside the GPS came back to work:

A solution for some GPS acquisition troubles

Yesterday's test was a success Just curious.........what was the temperature outside when you did the test flight?

yuneecpilots.com

I think it is worth to try before one replaces the MCU-board.

Another question: Is it possible to get one of those 'defective' MCU boards for further investigations? I'm in Europe (Germany), so I think best from Europe.

br HE

Kevin788 · Feb 8, 2021

h-elsner said:
I saw one intersting statement that say after 4h outside the GPS came back to work:

A solution for some GPS acquisition troubles

Yesterday's test was a success Just curious.........what was the temperature outside when you did the test flight?

yuneecpilots.com

I think it is worth to try before one replaces the MCU-board.

Another question: Is it possible to get one of those 'defective' MCU boards for further investigations? I'm in Europe (Germany), so I think best from Europe.

br HE

Hi, your more than welcome to my one, I'm in Scotland but could post in a letter?

Steve Carr · Feb 8, 2021

@h-elsner it would be interesting to try the multiple hour "burn-in" time to see if it has any effect. I am skeptical since it normally takes 12.5 min to download the almanac GPS data. So a longer wait would only provide time for the FC to somehow heal itself.

I have several bad FC boards so if @Kevin788 is unable to send one, I can do so.

DoomMeister · Feb 8, 2021

Steve,

Has reflashing the FW to the FC ever had any good effect for the GPS Acquiring problem? I know changing the GPS module rarely fixes this issue, and we have seen several that exhibit this problem after being stored for months without being powered up.

Steve Carr · Feb 8, 2021

DoomMeister said:
Has reflashing the FW to the FC ever had any good effect for the GPS Acquiring problem?

I've never had any luck with reflashing. Every one that I've fixed needed a new FC. That is an immediate fix.
Also, I don't think the failure is related to storage unless it's stored in a hot location. Each that I have had to deal with could be traced to overheating.

Vaklin · Feb 8, 2021

h-elsner said:
I saw one intersting statement that say after 4h outside the GPS came back to work:

Just to be honest in front of me and helpful to the community, today I tested this solution. Sorry to say, but this is not the right solution. Let us go further...

Lillywoof · Feb 17, 2021

I live in the United States and need to download the firmware file for the Typhoon H drone. Does it matter if I download the file from the yuneec UK webiste instead of the United States?

DoomMeister · Feb 17, 2021

Lillywoof said:
I live in the United States and need to download the firmware file for the Typhoon H drone. Does it matter if I download the file from the yuneec UK webiste instead of the United States?

Did you see the answer to your post in another thread ?

updating st16 via computer

I have downloaded the latest update on the computer do I have to unzip it before doing the update from the computer or leave it zipped?

yuneecpilots.com

Yuneec Skins · Feb 18, 2021

h-elsner said:
I saw one intersting statement that say after 4h outside the GPS came back to work:

A solution for some GPS acquisition troubles

Yesterday's test was a success Just curious.........what was the temperature outside when you did the test flight?

yuneecpilots.com

I think it is worth to try before one replaces the MCU-board.

Another question: Is it possible to get one of those 'defective' MCU boards for further investigations? I'm in Europe (Germany), so I think best from Europe.

br HE

Hi H,
I would be Happy to send you some Bad F/C's from the Typhoon H, just PM me with your mailing address, and I will send you several to Inspect, I too am curious why they seem to go bad when they were working fine until the Drone was stored normally until the next Flight. I have a dozen or so that are Bad, and don't want to dispose of them in Hopes of a Fix, I would think they could be salvaged, and possibly be used again....