ahmedFarouk2020 / Firmware-over-the-air

Update your MCU's flash code remotely over the web.

Firmware-over-the-air

Update your MCU's flash code remotely over the web.

What is FOTA?

It's a SW that is used to flash MCU (update MCU code) wirelessly over internet.

Components Used

1. stm32f103 MCU
2. ESP8266 MCU
3. Flask as web server

How to get started?

1. Download repo code git clone "https://github.com/ahmedFarouk2020/Firmware-over-the-air.git"
2. Install requirements.txt pip install -r requirements.txt
3. Get HW components mentioned above

Important Features

1. 2 Separate Banks (rooms) so if download fails in the middle you can go back to the old code
2. Smooth transitions betwen banks

Future Improvements

1. Authentication (using username and password provided by author) --> already implemented
2. Data Encryption and decryption (security management)
3. Data integrity check --> already implemented

First of all, Burn .hex file in FOTA-firmware/Debug on your MCU

Steps to use

1. Run app.py using this command python app.py the following is displayed
2. Copy the link to user browser
3. Click on "Choose File" button and choose hex file
4. click "Submit"
5. Reset MCU

Note: The Hex file used with this FOTA has a special format :)

How to create the Hex file

1. Create empty .hex file
2. Modify the ldscripts/mem.ld file in the project you want to upload to MCU as follows

MEMORY
{
  RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
  CCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 0
  FLASH (rx) : ORIGIN = 0x08002800, LENGTH = 27k
  FLASHB1 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB0 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB1 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB2 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB3 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  MEMORY_ARRAY (xrw)  : ORIGIN = 0x00000000, LENGTH = 0
}

3. Compile
4. Copy all the content of the generated hex file from step 3 and paste it in the empty file
5. Add '*' in a new line just after the present data
6. repeat the steps from 2 to 4 but with this new values

MEMORY
{
  RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
  CCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 0
  FLASH (rx) : ORIGIN = 0x08009400, LENGTH = 27k
  FLASHB1 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB0 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB1 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB2 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  EXTMEMB3 (rx) : ORIGIN = 0x00000000, LENGTH = 0
  MEMORY_ARRAY (xrw)  : ORIGIN = 0x00000000, LENGTH = 0
}

7. Your file is ready to be uploaded I will add a sample file too