So, I had one of these Citaq H10 EPOS Machines...
This machine runs android and on taking the back off there is a button marked 'recover'. Pressing this and resetting the unit gets the usual android recovery menu, but the unit has no volume up / down buttons to navigate the menu.
The processor inside the unit is a Rockchip RK3368. On their website is an example circuit of how to use this chip. It is very similar to the EPOS unit!
This bit...
Volume Up - 1
Volume Down - 170
Menu Key - 355
Home key - 746
Back key - 560
Camera key - 450
The voltage across these wires measures 1.8V and is pulled up via a 10K resistor, like the schematic shows.
So I tacked wire across the recover switch which led to the outside of the unit...
The ADC inside this chip is 10 bits so to get a value of 170 (Volume down) I need a resistor to pull the ADC pin down to 0.3V ( ((1.8V / 1023) * 170) = 0.299V )
A 2k resistor will do this, so booting into the recovery menu and using the 2k resistor to move the menu down to 'factory reset' and then selecting, does a factory reset :)
After rebooting, the unit boots into android with no Just Eat !
I don't know if there was a software way of doing this, but now I can add volume buttons to the EPOS unit. I can't get the printer to work yet, since it is a serial printer and doesn't expose its self to the android OS as a printer.
if you just press the reset button and then let go and before the blue light comes on at the front press the other button at the side of it and keep it pressed until you see the bootloader screen, you must be quick as it is quick at restarting after you press the reset, and the micro usb port at the side of the buttons is for programming from your pc with ADB mode.
ReplyDeleteThanks guys this was a really helpful post
ReplyDeleteI've just bought one off ebay and want to try it with my own apks for POS and printing to see which apk works best with their print driver
Can you help me reset mine please I’ve been trying for ages
DeleteCan you help me reset mine please I’ve been trying for ages
DeleteCan you help me reset mine please I’ve been trying for ages
DeleteCan you help me reset mine please I’ve been trying for ages
Deletegary f - where is the RESET BUTTON?
ReplyDeleteAHH did it - Attach Mouse
ReplyDeleteGo To Just Eat WiFi Settings - Go To Top Right Add Network
It Will then try to load their Mobile Control App
Go To Bottom left the Return Curly Arrow
keep hitting it until iy takes you to the normal start page
Go to Settings > Apps
Uninstall all Just Eat Apps - there are about 4
Then Go to do reset
:) :)
Salve sapete dirmi,se è possibile usare l'apparecchio , anche con dispositivi esterni!? Tipo vorrei stampare ricevute sumup , potrei farlo? Non riesco ad attivare il bluetooth , mi sapete dire come posso fare? Mi chiede password amministratore Just eat, non saprei cosa mettere, sApeye aiutarmi?
DeleteI will pay someone to reset this thing
ReplyDeleteI will pay someone to reset this thing
ReplyDeleteI will pay someone to reset this thing
ReplyDeleteI will pay someone to reset this thing
ReplyDeletehi,
ReplyDeleteI just bought a POS system and was wondering if you could help lock it, and also set it up so I can print receipts off the websites and apps
Ciao se sei interessato contattami johnnyvassallo1282@gmail.com
DeleteSolo tienes que conectar un teclado, sacar la tapa trasera dónde están los botones, encender totalmente y darle al reset y a continuación pulsar el de restore continuamente hasta entrar en el menú de boot y después dar a fabric wipe y finalmente reload y ya está.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteDid some of you do the serial printer work?
ReplyDeleteDid anyone ever get the printer working? i know theres the printerproxy app but their websites gone offline and the contact num dont work anymore either so can't even purchase that
ReplyDeletei don`t think any body did get the printer working, i quit with mine as it is only android 5 and cannot do nowt with apart from play music or play films and some!! apps from play store
ReplyDeleteFair enough, im just gonna use it as an offline pos system in shop basically so would have been ideal to get printer working for receipts but guess i can always attach a thermal usb or bluetooth printer anyway, cheers man
ReplyDeleteHi, this tutorial workes for me to turn the volume down although I am not entirely sure how u calculated the values for resistance.
ReplyDeleteWhat would the resistance be for menu home and back be?
Thanks
S
Home needs 1.32V ((1.8 / 1023) * 746 = 1.32)
ReplyDeleteCalculate current through 10k pull up, ((1.8 - 1.32) / 10000) = xA
Ignoring current going into ADC pin we can work out the pull down value...
1.32 / xA = 27.5k
Similarly for Back button, 12k
This comment has been removed by the author.
ReplyDeleteThought I would put this here
ReplyDeleteIf you unzip the .rar file you need to go into the file \CitaqFactory\bin then the CitrqFactory.apk is in there.
It includes an app that allows you to test all of the functions of the Citaq H10 also allowing you to upload any jpg and text to print although make sure to convert your pictures to monochrome otherwise they come out a black block!
(sorry the link is a direct download as I lost the place I actually got it from and I deleted the last comment because I missed a bit out) :)
Add a wireless keyboard. Attach the usb receiver to the side usb. Press recovery button and when you are in recovery, the keyboard up down arrow works. Worked withlogitech k400+ keyboard. Restored to factory default.
ReplyDeleteit is just a shame we cannot update the software on them as they are only android 5 but they are ok for kids games from playstore
ReplyDeleteIf some one can help me reset these devices, I'd be happy to pay for their time
ReplyDeleteContact me 07792217000
07782217000 is the correct number
DeleteContattami johnnyvassallo1282@gmail.com
DeleteAlguien sabe si con teclado no inalámbrico lo detectaría?
ReplyDeleteA normal wired keyboard should work in the same way too
ReplyDeleteUsing google translate:
Un teclado con cable normal también debería funcionar de la misma manera
Thnak you for the info, the factory reset worked as a charm.
ReplyDeleteHow it can be possible to use it as printer for sumup as example?
ReplyDeleteYes, it is if you make an android app to connect to the built-in printer which is what I have been trying to do although I haven't developed android before so it is slow going. Soon I will set up a google drive with some helpful resources in it.
ReplyDeleteOK ive done this (after dismatleing it tring to find the reset button) and its a lot easier than every ones saying (2 min job), the instuctions are very vauge above and you dont need to solder anything. you will need
ReplyDelete1 usb mouse
1 posi screwdriver
1 finger
open the screen as if your replacing printer paper, on the backside of the screen is a rubber cover for simcard and memory card uncrew this, you will find 2 push buttons one marked reset.
plug in mouse then hold down the OTHER button then press reset btton once keep other button held down this should reset the unit into recovery release other button when its onscreen. it is true there is no volume button to use to go up down on the menu but if you move the mouse you have plugged in up and down the menu selection will go up and down( this is EXTREMELY sensitive so just move mouse very slowly) to sellect option press OTHER button once
select factory reset
select yes once this has been done reset unit and it will have blank android no just eat.
FYI you may want a usb keyboard at this point as my unit didnt want to show me the onscreen keyboard automaticaly
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ReplyDeleteYou only need to connect a keyboard to the USB port,(wired or wireless).
ReplyDeleteStart the H10 and press random on the keys ( Esc, F1, F2, Ctrl, Alt) Many times, until you get a popup error message, push Ok and choice Charger3 and then Always...Then Ok.
Now you get access to the Desktop and can then go to
- Settings ,Backup & reset- Factory data reset. ( Make that quickly!! you have only a few seconds...
If you want to upload Apps:
Settings - About - push 7 times to Kernel version.
Settings - Developer options, and make sure USB debugging is On.
Settings - Security - Unknown sources is On.
Use ADB Android Debugging Bridge.
$adb start-server
$adb connect HOST_IP:5555
$adb push App_Name.apk /sdcard/
Then you can install from the desktop.
Enjoy!!
Sorry
ReplyDeleteCharger3 is Launcher3 and Settings - About - push 7 times to Build number.
It is quite EASY to RESTORE it. Just press then RESET button and keep pressing RECOVER after. The device will come to recovery menu. If you have the keyboard connected you can move up down and use enter without the need to any soldering and resistors.
ReplyDeleteIt's very Appreciated Blog Post. epos printers Thanks for sharing this is useful information.
ReplyDeleteEASY FIX
ReplyDelete1. Open printer.
Here you you will see a reset button with a grey cover. This also holds the SIM card.
2. Unscrew cover (2 screws)
3. Plug keyboard in to usb.
4. Press reset then hold down recover until recover menu appears.
5. Press factory reset!
Done