ESP-AT Firmware Differences

[中文]

This document compares the differences among AT firmwares of a certain ESP32-S2 series in terms of the supported commands set, hardware, and supported modules.

ESP32-S2 Series

This section describes the differences among AT firmwares of ESP32-S2 series, including

  • ESP32-S2-MINI-AT-Vx.x.x.x.zip (referred to as MINI Bin in this section);

Supported Command Set

The table lists which command set is supported by default in the official AT firmware applicable to ESP32-S2 series of modules (marked with icon-green-check), which is not supported by default but can be supported after configuration of the ESP-AT project (marked with icon-orange-check), and which is not supported at all (marked with icon-red-cross). Note that the command set that is not shown in this table is not supported either. Applicable firmware that has not been officially released requires compilation by yourself. Those self-compiled firmware cannot be upgraded OTA from Espressif official server.

Command Set

MINI Bin

base

icon-green-check

user

icon-green-check

Wi-Fi

icon-green-check

TCP-IP

icon-green-check

mDNS

icon-green-check

WPS

icon-green-check

SmartConfig

icon-green-check

ping

icon-green-check

MQTT

icon-green-check

HTTP

icon-green-check

FileSystem

icon-orange-check

driver

icon-orange-check

WPA2 enterprise

icon-orange-check

Web server

icon-orange-check

WebSocket

icon-orange-check

OTA

icon-green-check

Hardware Differences

Hardware

MINI Bin

Flash

4 MB

PSRAM

icon-red-cross

UART Pins [1]

TX: 17
RX: 21
CTS: 20
RTS: 19

Supported Modules

The table below lists the modules or chips that are default supported by the officially released ESP32-S2 series AT firmware (indicated by icon-green-check), the modules that are not supported by default but can be modified to be supported using the at.py Tool (indicated by icon-orange-check), and the modules that are not supported at all (indicated by icon-red-cross). For modules that are not supported at all, you can refer to Compile ESP-AT Project Locally to modify the configuration as needed for support.

Module/Chip

MINI Bin

ESP32-S2-MINI-2/2U

icon-green-check

ESP32-S2-SOLO-2/2U

icon-green-check