Note - You will need to reinstall the driver if you already had it installed before the firmware was released. If you have trouble getting the software to recognize your device as being compatible with the firmware when you get to this point in the installation, you likely need to reinstall the driver.
Note - Requires Windows and a PC.
Note - Upgrading or downgrading your firmware will erase all your watts / joules settings you have stored in your memory locations so make a note of them if needed.
If downgrading, you do not need to reinstall the driver, scroll down in these instructions toward the bottom and follow the instructions under the firmware installation section.
Go here (
SXmini M Class manufacturers,SXmini M Class exporters,SXmini M Class suppliers,SXmini M Class OEM service. and scroll all the way to the bottom of the page, in the 3 column from the left is a download section, start by downloading the driver (do not close the browser) and install like usual.
On this same page, right below the driver, there are two files, Upgrade firmware for m class 120 watts and another for 150 watts. They both work, have no idea what the difference is between them as far as functionality or performance (I installed both and functionality wise, they were identical).
Note, the original 1.4 firmware is also listed here in case you wish to revert back to the firmware that came with your device, follow the directions toward the bottom of these instructions under 'firmware installation'.
Listed below, the first bit is the name of the file, the second number is the size of the file after its been unzipped, the third is the date the file was modified. Which one you should use is as good a guess as mine, but they do both work and are functional and all listed bugs mentioned above still exist.
I am using the 120 watt file in case you want to know which one I decided to keep (again, I verified that they both work).
SXmini-M Class 1st upgrade software_SXmini_Logo-120W_20150525-1424_V2.1.SXI --> 115,313 --> 5/22/15
SXmini-M Class 1st upgrade software_SXmini_Logo-150W_20150525-1711_V2.1.SXI --> 115,353 --> 5/22/15
Whichever you decide to use, extract them somewhere you can locate (they must be extracted, the SXI software wont accept a rar file).
You can use several programs to unzip / extract, my personal preference is IZArc but 7zip is also a great choice.
IZarc can be found here:
Download - IZArc - Free Zip Files Utility - Zip files, unzip files
7zip can be found here:
7-Zip
Once extracted, open the Yihi software, it can be found in your start menu under All Programs-->Yihi SXI-->SXI (right click on SXI and run as administrator, click the ok box to confirm when it appears).
Now press your fire button on your SX Mini 5 times and continue tapping the fire button until you get to Link off, press your up button to turn link on, then plug in to your pc.
Note: Some have had trouble getting their PC to detect the device and had better luck removing the battery, plugging in the USB plug, tapping the fire button 5 times to turn the device on, then continuing to tap until you get to Link off, then press your up button to turn link on.
When the program opens, click Connection, then click Install Driver, then click the Start Windows 7 or Windows 8 (32X or 64X) setting button.
In the new window, you should see your SX Mini listed in the dropdown, click the button right below that to install the driver (Install WCID Driver) and confirm any prompts that appear (I believe there is an unsigned certificate that will appear, click ok).
Once done, you can close the window with the dropdown box and you should see the previous window that was open, you'll now click the Connect button and in green, it should tell you the device is connected.
Now, at the top, click the return button.
Firmware installation
Click the Upgrade button. Click the open file button and locate the firmware file you downloaded and extracted earlier and click open (or double click on the file).
Now, verify the message below the upgrade button, it should be completely green, if any part of it is red, you probably have the wrong file, the software isnt seeing your device, OR (IMPORTANT!!), you have the older driver software installed and need to reinstall the driver - download and install the driver again and follow the instructions from the beginning.
If everything is green, click the upgrade button and you should see a progress indicator, when it reaches 100%, youre done.
Unplug your device, pull the battery, reinsert the battery, press your fire button 5 times to boot your device, then vape away.
It should be noted that the process of upgrading or downgrading your firmware also erases your Joules / Watts settings for all memory locations and those will have to be configured again.