Firmware uses Espressif ESP-IDF. I've initially tried to get it working with PlatformIO, but was not successful as there are compatibility issues between cmake based IDF vs PlatformIO. Thus project is using IDF directly. I am on Linux (Debian), so the following steps are tested only there.
- Install IDF to your computer as described at Espressif documentation.
- Configure your environment. For example by
source ~/esp/esp-idf/export.sh. - Configure project with
idf.py menuconfig. There is also a configuration sectionSmall Clock Configuration. - Build with
idf.py buildand flash withidf.py flash.
There is a LOCAL_TZ_DATA configuration option. It expects tzdata timezone configuration string. If on Linux, you can use the simple python script get_tz_data.py to get it from your local tzdata definition (typically located at /usr/share/zoneinfo/). For example:
$ ./get_tz_data.py Europe/Prague
CET-1CEST,M3.5.0,M10.5.0/3
$ ./get_tz_data.py America/New_York
EST5EDT,M3.2.0,M11.1.0
You can get list of possible timezone names with timedatectl list-timezones or just simply check which files are in the zoneinfo directory.