[SOLVED] Arduino and esp as telemetry without using library

is there any way to send data without using arduino libraries?

Greetings, you may send AT commands to the ESP8266 using the arduino’s serial port.

Once you can make that both devices can interact, implement a POST requests that fits our REST API implementation.

Also, if you need some reference, you can see some examples at our help center.

Regards

Thank you. Now my project is working without using libraries.