# Application Development This section contains concise M1 application development notes adapted from the H1 references and checked against the connected M1 board where practical. - Python Virtual Environment Usage - Python GPIO Development - C/C++ GPIO Development - GPIOD User Guide The GPIO pages use the verified M1 environment: Debian 13, Python 3.13.5, libgpiod v1.6.3, and visible GPIO controllers `/dev/gpiochip0`, `/dev/gpiochip1`, and `/dev/gpiochip2`.