ESP8266 Community Forum

- Mon Feb 13, 2023 11:39 am #95988 Hello,
I'm using a ESP8266-01S with AT commands. So far everything works as expected, but
I noticed a strange behaviour if I use leading zero in IP address.

There is a difference if I use

case A : AT+CIPSTA_CUR="192.168.004.041","192.168.004.001","255.255.255.000"
or
case B : AT+CIPSTA_CUR="192.168.4.41","192.168.4.1","255.255.255.0"

In both cases the device accepts the string. In case B it works with the corrcect IP address, but in case A
the default IP is used instead.

Is it not allowed to use leading zeros or am I doing something wrong?

Thank you for any hint.

- Mon Feb 20, 2023 3:49 am #96022 Are IP addresses with and without leading zeroes the same?
From this discussion you will see that sometimes a number with a leading zero will be understood as an octal-notation.