Bugfix calculation of needed gas:
Sometimes a gas was not calculated because of it's change depth calculation. Rootcause was a problem in the setup of the gas change list. The old function collecting milestones like time to first stop etc. has been removed because after the deco compression the complete profile is available. Instead of doing another way of profile calculation the existing profil is now evaluated and the time stamps / gas consumption derived from there.
3 The free and Open [STM32 IDE](http://www.openstm32.org/System%2BWorkbench%2Bfor%2BSTM32) is an integrated development environment based on _Eclipse_ that will allows you to compile and link code for the OSTC4 dive computer.
4 You will then be able to generate `.bin` firmware files to upload to your computer using your favourite tools, eg. [OSTC Companion](https://ostc-planner.net/companion).
7 2. Once registered and logged in, you can go to _Documentation_ and _Installation Manual_. Follow the instructions to install the IDE (available for Windows 7, MacOS and Linux).