Serial Monitor changes time-stamp format

ullix · June 3, 2021, 12:10pm

Here an example:

13:52:28.556 -> 
13:52:29.879 -> 
14:1:40.586 -> 
14:1:40.587 -> 
14:1:45.742 ->

This is not only strange for a Time format, but also awkward if you want to parse it later.

The '1' needs to be a '01'!

system · October 1, 2021, 12:10pm

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pert · October 28, 2021, 6:23am

ptillisch · October 28, 2021, 6:25am

Thanks @ullix! I have submitted a formal report to the IDE developers:

github.com/arduino/arduino-ide

Leading zeros are stripped from Serial Monitor timestamps

opened 06:23AM - 28 Oct 21 UTC

closed 07:15AM - 08 Sep 22 UTC

per1234

conclusion: resolved topic: code type: imperfection topic: serial monitor

### Describe the problem 🐛 The timestamps produced by the Serial Monitor have… a non-standard format resulting from stripping the leading zeros from the hours and minutes. 🐛 This is not even done consistently as the leading zeros are preserved for seconds. ### To Reproduce Steps to reproduce the behavior: 1. Upload a sketch to an Arduino board that periodically prints to the serial port. For example: ```cpp void setup() { Serial.begin(9600); } void loop() { Serial.println("hello"); delay(1000); } ``` 1. Select **Tools > Serial Monitor** from the Arduino IDE menus. 1. Click the :clock10: icon ("Toggle Timestamp") that is near the top right corner of the output panel 1. Wait for a time that contains a second less than 10. 1. Look at the Serial Monitor output pane. 🙂 Note that the leading zero on the second component of the time has _not_ been removed. 1. Wait for a time that contains a minute less than 10. 1. Look at the Serial Monitor output pane. 🐛 Note that the leading zero on the minute component of the time has been removed. 1. Wait for a time that contains an hour less than 10. 1. Look at the Serial Monitor output pane. 🐛 Note that the leading zero on the hour component of the time has been removed. ``` 23:59:58.610 -> hello 23:59:59.609 -> hello 0:0:00.620 -> hello 0:0:01.618 -> hello 0:0:02.630 -> hello ``` ### Expected behavior Serial Monitor timestamps to be formatted the same as they were in the classic Arduino IDE: hh:mm:ss.sss ``` 00:05:02.590 -> hello ``` ### Arduino IDE version #### Original report 2.0.0-beta.12-nightly.20211028 #### Last verified with 2.0.0-rc9-snapshot-5087ff0 ### Operating system Windows 10 ### Additional context Originally reported at: - https://forum.arduino.cc/t/serial-monitor-changes-time-stamp-format/870115 - https://github.com/arduino/arduino-ide/issues/391#issuecomment-877585479