> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-lua-reference-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions.md).

# General Functions

- [GREY()](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/grey.md)
- [defaultChannel(stick)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/defaultchannel.md)
- [defaultStick(channel)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/defaultstick.md)
- [getDateTime()](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getdatetime.md)
- [getFieldInfo(name)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getfieldinfo.md)
- [getFlightMode(mode)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getflightmode.md)
- [getGeneralSettings()](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getgeneralsettings.md)
- [getTime()](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/gettime.md)
- [getValue(source)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getvalue.md)
- [getVersion()](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/getversion.md)
- [killEvents(key)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/killevents.md)
- [playDuration(duration \[, hourFormat\])](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/playduration.md)
- [playFile(name)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/playfile.md)
- [playNumber(value, unit \[, attributes\])](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/playnumber.md)
- [playTone(frequency, duration, pause \[, flags \[, freqIncr\]\])](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/playtone.md)
- [popupInput(title, event, input, min, max)](https://doc.open-tx.org/opentx-lua-reference-guide/part_iii_-_opentx_lua_api_reference/general_functions/popupinput.md)