This could be the solution, I am connecting to WiFi before I set config.

https://github.com/espressif/esp-idf/blob/master/examples/protocols/sntp/main/sntp_example_main.c

* NOTE: This call should be made BEFORE esp acquires IP address from DHCP,
* otherwise NTP option would be rejected by ...

I am using a raspberry Pi with ntp install.
Here is the ntp server listening and accessing it

svvs@raspberrypi:~ $ sudo ntpdate
2025-08-04 03:32:34.269338 (-0600) -0.000003 +/- 0.000050 localhost ::1 s4 no-leap
svvs@raspberrypi:~ $ ss -lu
State Recv-Q Send-Q Local Address:Port Peer Address ...

I am trying to use https_request to set time from dhcp.
I commented out code to make SNTP request to sync time every time the app starts.
I included the DHCP ACK to show that the ESP32 is receiving SNTP info, YES
I am using wireshark to see if the NTP packets are be sent to the server, NO they are ...

Every I2C device needs a driver. The ESP I2C APi just write data to the device.
For memory read or write there is a register on the memory device that holds the memory address you want accessed.

Look at the I2C device, find the part number and then find the documentation for that part . that ...

Seeed Xiao ESP32C3 is a good choice. but to reduce power consumption, sleep mode is necessary.

I am trying to use examples/https_request. I changed the server_root_cert.pem to my own CA root cert.
I created a server cert using an intermediate cert. CA root => intermediate cert => server cert.

The error -0x2700 is MBEDTLS_X509_BADCERT_CN_MISMATCH
https://forums.mbed.com/t/x509-verify-cert ...