Recommended way is to create symlinks in the OpenMQTTGateway repo dir pointing to each individual env config file located in this repo.
Optionally you can create secret_env.ini (ignored by the Git) taking secret_env.ini.example as an example and populating it with relevant values. This will completely disable ESP WifiManager and configure OpenMQTTGateway using variables provided in the secret_env.ini
Example:
cd /path/to/the/OpenMQTTGateway
ln -sf /path/to/the/omg-envs/omg_grower_env.ini .
ln -sf /path/to/the/omg-envs/omg_d1mini_rf_env.ini .
ln -sf /path/to/the/omg-envs/secret_env.ini .Install PlatformIO for Visual Studio Code.
Open /path/to/the/OpenMQTTGateway inside VSCode
Switch to the appropriate PlatformIO env, "OTA" envs are recommended for simplicty and remote firmware uploads, however for debugging purposes you might want to connect your device via cable and use "non-OTA" env, like d1mini-grower-prod etc.
Now you're ready to build/upload firmware or connect to your device via serial monitor using PlatformIO inside VSCode