Time.timezone

[Frida854]

Time.timezone and Time.dst

I'm making a train clock that can be set via a website.
I've come across something strange.
Without setting timezone or dst.
When I download the program to an esp32c3 it shows:
timezone = 3600 and dst = 0, and the time is 13:xx GMT+1. Which is my local time.

But when I connect it to a power supply it shows:
Timezone = -28800 and dst = 3600, and the time is 12:xx GMT+0. Which is GMT time.
It uses dst but not timezone, I'm surprised!

When I set timezone = -28800 and dst = 3600, the time is displayed
Correct with GMT-7.

[phoddie]

The ESP-IDF doesn't manage the timezone and DST offset across boots. The Moddable SDK ESP32 port provides tools so you can manage that.

• When debugging with xsbug, the time, timezone, and DST offset are transferred from your computer to the device as part of establishing the debugging connection. This is convenient magic.
• When there is no debugger connection, the ESP32 defaults to Unix time 0. The Moddable SDK defaults to summer in Menlo Park, which is perfect for me 50% of the time.
• You can always use Time.timezone and Time.dst to set the timezone and DST offset to the values you want. That information might come from hard coded constants, a stored preference, user input, or the network. You might put that code in a setup/* module so that it is easily reused across projects and automatically run at launch.

[phoddie]

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