hitec multicharger x4 modding firmware

[Pat Foerster]

hi

i have some balance differences with this charger. it´s like the hobbyking quattro charger inside

also the main voltage calibration set to -20 but the voltage doesn´t match with my real voltage.

the charger has atmega32a on it.

now i tried to flash one of the four chargers with some of the hex files but on the flash verify i´m getting always a "mismatch at location 0x00000000" error
i saved the original firmware here: http://www.mediafire.com/download/27pmaz4tqgn7715/hitec_q_org.hex
reflashing my backup works BUT now i have white squares in the display :( and i don´t know how to fix it.

perhaps someone could modify the original firmware to get in the expert calibration menu 1?
or to get the charger working again? :/

thank you very much for your help

regards
patrick

[Paweł Si]

Unfortunately  your flash  was locked,

the hex file contains only a  increasing sequence of bytes,

have you tried the cheali-charger firmware?

[Pat Foerster]

hi

yes i tried

cheali-charger-imaxB6-clone-0.32.hex
cheali-charger-imaxB6-original-0.32.hex
cheali-charger-Turnigy-Accucel-6-50W-5A-0.32.hex
and a imax b6 mod file of rcgroups forum

always getting this "mismatch at location 0x00000000" after flashing :/

[Paweł Si]

can You send me the avrdude output?

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[Pat Foerster]

yes when i know where to find :D

i use http://extremeelectronics.co.in/avr-tutorials/gui-software-for-usbasp-based-usb-avr-programmers/ to program

[Paweł Si]

just try: 

http://savannah.nongnu.org/projects/avrdude

type something like this into cmd.exe:

avrdude.exe -patmega32 -cusbasp -Uflash:w:cheali-charger-imaxB6-clone-0.33.hex:a

[Pat Foerster]

YEEEAAAAH it works....lol

with this commandline and this flash it works!!!
i have readable letters on the screen!!!

[Nagy Jozsef]

Hi

i flashing the quattro4x6s (Hobbyking) charger, new fw (1.0).

This version is fantastic. Many Thanks Pawel.

hitec:

https://www.google.hu/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http%3A%2F%2Fwww.redrc.net%2F2010%2F08%2Fhitec-x4-four-channel-multi-charger-2%2F&ei=VMBJVeOCK8yy7QbB_4BI&psig=AFQjCNGya5LQ337tJ9emNLG6C7x4ysTP2g&ust=1430983125186853

HK clone?

http://hobbyking.com/hobbyking/store/__10327__HobbyKing_8482_Quattro_4x6S_Lithium_Polymer_Multi_Charger.html

flashed by accucell50W.

Little bug?

default eeprom data is wrong or any.

https://lh6.googleusercontent.com/-SCYWot_qLBY/VUnByXnDPXI/AAAAAAAAIsY/MkLAKF2o8r4/w1024-h768-no/upload_-1

I experienced 50W charger.

[Martin Laža]

Today I found an error in firmware for Hobbyking Quattro 4x6S:

calibration and measurement of the voltages cells works corectly and as expected, but current measurement is wrong - there is a change in schematics and voltage divider or gain of the measuring opamp is set differently -> real current is 0.66 of the displayed value on the charger -> temporary I changed the calibration constants accordingly.

I am running on the v1.1...

Dne středa 6. května 2015 9:27:35 UTC+2 Nagy Jozsef napsal(a):

[Paweł Si]

2015-07-21 23:14 GMT+02:00 Martin Laža <xlaz...@gmail.com>:

Today I found an error in firmware for Hobbyking Quattro 4x6S:

calibration and measurement of the voltages cells works corectly and as expected, but current measurement is wrong - there is a change in schematics and voltage divider or gain of the measuring opamp is set differently -> real current is 0.66 of the displayed value on the charger -> temporary I changed the calibration constants accordingly.

I am running on the v1.1...

please calibrate the charge current again,

make a test charge and send me:

1. the displayed current

2. the measured current

IMPORTANT: measure current on the red wire (BAT+ wire)

[Martin Laža]

Real discharging at 300mA

Calibration at 300mA

Calibration at 100mA

Available items in Discharge Current Calibration

Internals

Measuring setup

Charger version

Dne úterý 21. července 2015 23:35:00 UTC+2 cheali-charger napsal(a):

[Paweł Si]

2015-07-22 9:46 GMT+02:00 Martin Laža <xlaz...@gmail.com>:

Real discharging at 300mA

so it's  a problem with discharge current?

Measuring setup

was the balance port connected during the discharge test?

 

[Martin Laža]

Problem is same in discharging and charging - it is only the matter of scale - and it is easier to do so on lower current and discharge mode with battery charged to approx 90%

Martin

Dne středa 22. července 2015 13:19:21 UTC+2 cheali-charger napsal(a):

[Paweł Si]

2015-07-22 15:15 GMT+02:00 Martin Laža <xlaz...@gmail.com>:

Problem is same in discharging and charging - it is only the matter of scale - and it is easier to do so on lower current and discharge mode with battery charged to approx 90%

Martin

 

was the batteries balance plug connected to the charger during this test?

[Martin Laža]

During calibration charger says to disconned the balance plug. During discharging the plug is connected - charged does not start discharding without this plug

Dne středa 22. července 2015 15:42:11 UTC+2 cheali-charger napsal(a):

[Paweł Si]

2015-07-22 16:32 GMT+02:00 Martin Laža <xlaz...@gmail.com>:

During calibration charger says to disconned the balance plug. During discharging the plug is connected - charged does not start discharding without this plug

could you repeat your test but this time

connect your amp-meter in series with the RED batteries wire?

[Martin Laža]

Hi,

i checked the schematics and charger topology and now it makes sense to put ampmeter to positive wire and now the charger works as expected ;) The internal resistance of the amp meter caused this deviation

Thanks Pawel for great work!

Dne středa 22. července 2015 17:17:12 UTC+2 cheali-charger napsal(a):

[Paweł Si]

2015-07-23 9:39 GMT+02:00 Martin Laža <xlaz...@gmail.com>:

Hi,

i checked the schematics and charger topology and now it makes sense to put ampmeter to positive wire and now the charger works as expected ;) The internal resistance of the amp meter caused this deviation

another problem solved :)

to be honest, it took me awhile to realize what is going on there

to this day I don't fully understand why on some chargers (not all) the balance port is connected to the "-" main lead.

could you do me a favor?
could you add a short note to the "Troubleshooting" section:
https://github.com/stawel/cheali-charger/blob/master/README.md#troubleshooting
about your issue and how to deal with it?

Best Regards
Paweł