ESP-AT Firmware Differences
This document compares the differences among AT firmwares of a certain ESP32-C2 series in terms of the supported commands set, hardware, and supported modules.
ESP32-C2 Series
This section describes the differences among AT firmwares of ESP32-C2 series, including
ESP32C2-2MB_AT_Bin (referred to as ESP32C2-2MB Bin in this section);
ESP32C2-4MB_AT_Bin (referred to as ESP32C2-4MB 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-C2 series of modules (marked with 
), which is not supported by default but can be supported after configuration of the ESP-AT project (marked with 
), and which is not supported at all (marked with 
). 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 |
ESP32C2-2MB Bin |
ESP32C2-4MB Bin |
|---|---|---|
base |
|
|
user |
|
|
wifi |
|
|
net |
|
|
MDNS |
|
|
WPS |
|
|
smartconfig |
|
|
ping |
|
|
MQTT |
|
|
http |
|
|
FS |
|
|
driver |
|
|
WPA2 |
|
|
WEB |
|
|
OTA |
|
|
blufi |
|
|
Hardware Differences
Hardware |
ESP32C2-2MB |
ESP32C2-4MB |
|---|---|---|
Flash |
2 MB |
4 MB |
PSRAM |
|
|
UART Pins 1 |
TX: 7
RX: 6
CTS: 19
RTS: 20
|
TX: 7
RX: 6
CTS: 5
RTS: 4
|
- 1
UART pins can be customized. See How to Set AT Port Pins for details.
Supported Modules
The table lists the ESP32-C2 modules or chips that each AT firmware supports.
Module/Chip |
ESP32C2-2MB Bin |
ESP32C2-4MB Bin |
|---|---|---|
ESP8684 MINI series |
|
|
ESP8684 WROOM series |
|
|