README.md
# sniff
Elixir Serial Port NIF
**Notice:** sniff focuses in the native interface to serial ports. For higher level serial port access see [baud](https://github.com/samuelventura/baud).
## Installation and Usage
Add `sniff` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:sniff, "~> 0.1.7"}]
end
```
## Test
```bash
# test with socat ttys
./test.sh
# test with custom ttys (null modem)
export TTY0="/dev/ttyUSB0"
export TTY1="/dev/ttyUSB1"
mix test
```
## Windows
Install `Visual C++ 2015 Build Tools` by one of the following methods:
- Download and install [visualcppbuildtools_full.exe](http://landinghub.visualstudio.com/visual-cpp-build-tools)
- Thru [Chocolatey](https://chocolatey.org/) `choco install VisualCppBuildTools`.
From the Windows run command launch `cmd /K c:\Users\samuel\Documents\github\sniff\setenv.bat` adjusting your code location accordingly.
## Ubuntu
Give yourself access to serial ports with `sudo gpasswd -s samuel dialout`. Follow the official Elixir installation instructions and install `build-essential erlang-dev` as well.
## MacOS
Give yourself access to serial ports with `sudo dseditgroup -o edit -a samuel -t user wheel`.
## Roadmap
Future
- [ ] Binary distro to avoid devenv setup
- [ ] Cleanup windows compilation warnings
- [ ] Requirements to migrate to elixir_make:
- Allow using a different make file for each unix platform
- Pass the BUILD_PATH to the makefile
- Pass the ERTS_HOME to the makefile
0.1.7
- [x] Auto close monitor and test
0.1.6
- [x] Fixed raw mode to avoid byte 15 swallow in macos
- [x] Testing with fake socat ttys
- [x] Requires full posix serial port path
- [x] Pass test serial port thru environment variables
0.1.5
- [x] Added O_NONBLOCK for MacOS file open.
- [x] Tests confirmed to pass on linux.
- [x] Upgraded ex_doc to compile with latest elixir
- [x] Test serial port names detection on unixes
- [x] Fixed binary leak when serial_read fails
- [x] Separated darwin and linux baudrate files
0.1.4
- [x] Handle spaces in Windows build path
0.1.3
- [x] Document Windows dependencies
- [x] BAT to launch windows dev environment
- A bat to call env.bat and cd back to code folder is provided
- must be executed from Windows run command (no double click)
- [x] Ensure native library can be loaded on first compile
- First deps.get && compile works fine
- Second compile works fine
- clean && compile fails to load NIF library
- [x] Ensure native library can be loaded from IEX
- Tested on OSXElCapitan/Ubuntu16.10/Windows10
- [x] Ensure native library can be loaded when used as dependency from IEX
- Tested on OSXElCapitan/Ubuntu16.10/Windows10
- [x] Pass the ERTS_HOME to unix makefiles
- Tested on OSXElCapitan/Ubuntu16.10/Windows10
0.1.2
- [x] Empty priv is committed and included in hex package so that native libraries get copied to `_build` when compiled as dependency
0.1.1
- [x] Tests pass on a clean Windows 10 VM (see build.bat)
- [x] Automatic test against Ubuntu 16 & Windows 10
0.1.0
- [x] Drop mac target until stable serial ports
- [x] Ubuntu 16.04 64 and Windows 10 Pro 64 support
- [x] Extract baud nif branch to its own repo
## Research
- Bypass the 0.1s minimum granularity on posix systems
- Higher baud rates support for posix and win32
- DTR/RTS control and CTS/DSR monitoring
- Unit test 8N1 7E1 7O1 and baud rate setup against a confirmed gauge
- Posix async and Windows overlapped
- Buffer discarding