All adapters ELM327 hfmscan, issue of 2015 and beyond, have a boot loader (bootloader) firmware. With bootloader you have the ability to update the firmware without using the programming tool.
When power is applied to the adapter that is first loaded and bootloader checks the following conditions:
- The availability of firmware
- K-line(OBD pin 7) on the ground
- The state of bytes X in EEPROM
If at least one of the conditions (eg no flash in the adapter or K-line at ground or Byte at a specific address in memory) the bootloader waits for commands to update the firmware ...
If the condition is not satisfied, control is transferred to the main program (the main mode).
Wherein when the adapter is in bootloader mode, LEDs blink high frequency c.
To use the adapter, it was written "program ELM327" and there I embedded the ability to update the firmware of my ELM327 adapters.
Warning! This program allows you to update the firmware only for the adapter ELM327 hfmscan!
In general, when you need to update the firmware, you need to perform the following steps:
1. Apply power to the adapter.
2. WIFI: you want to connect to an access point, an adapter
. 3. ELM327 run the program, set the speed to 38400, "ELM327" adapter type and select the desired port (for example WIFI if the work is in the air).
4. click Connect, the software will connect to the adapter.
5. If the adapter is in the ground operation, pressing the [Fill firmware] will start the process of updating the adapter will be a lot of different lines on the screen, and the process must be completed with information about successful firmware.
 If the adapter is in bootloader mode and the LEDs blink at a high frequency, it is possible to press the test button - bootloader will respond a certain message. In this mode you can also press the [Fill firmware] and start the process.
 After the firmware update, the adapter should return to the main mode of operation, and shall respond to any commands such as ATZ, ABOUT and other ...
 If to-line is on the red, the adapter can not leave the bootloader mode.
Download it at:

The program for firmware update on ELM327 hfmscan