• Why do we need this ESP_AT_Lib library
  • Features
  • Currently Supported Boards
  • Currently Supported AT-command shields
• Changelog
• Prerequisites
• Important Notes about AT Firmwares
  • 1. Firmwares tested OK with ESP8266 AT shields
  • 2. Firmwares tested OK with ESP32 AT shields
  • 3. Firmwares tested OK with WizFi360 AT shields
• Installation
  • Use Arduino Library Manager
  • Manual Install
  • VS Code & PlatformIO
• Packages' Patches
  • 1. For Adafruit nRF52840 and nRF52832 boards
  • 2. For Teensy boards
  • 3. For Arduino SAM DUE boards
  • 4. For Arduino SAMD boards
    • For core version v1.8.10
    • For core version v1.8.9-
  • 5. For Adafruit SAMD boards
  • 6. For Seeeduino SAMD boards
  • 7. For STM32 boards
    • 7.1. For STM32 boards to use LAN8720
    • 7.2. For STM32 boards to use Serial1
  • 8. For RP2040-based boards using Earle Philhower arduino-pico core
    • 8.1. To use BOARD_NAME
    • 8.2. To avoid compile error relating to microsecondsToClockCycles
  • 9. For Portenta_H7 boards using Arduino IDE in Linux
  • 10. For RTL8720DN boards using AmebaD core
  • 11. For SAMD21 and SAMD51 boards using ArduinoCore-fab-sam core
  • 12. For Seeeduino RP2040 boards
  • 13. For Seeeduino nRF52840 boards
• HOWTO Get started
  • API List
• Hardware Connection
  • MEGA, SAM DUE
• Attention
• Examples
  • 1. ConnectWiFi
  • 2. HTTPGET
  • 3. TCPClientSingle
  • 4. TCPClientMultiple
  • 5. TCPServer
  • 6. UDPClientSingle
  • 7. UDPClientMultiple
• Example TCPServer
• Debug Terminal Output Samples
  • 1. HTTPGET on RASPBERRY_PI_PICO with ESP8266-AT shield
  • 2. HTTPGET on MBED RASPBERRY_PI_PICO with ESP8266-AT shield
  • 3. TCPServer on WIZNET_WIZFI360_EVB_PICO
• Debug
• Troubleshooting
• Releases
• Issues
• TO DO
• DONE
• Contributions and Thanks
• Contributing
• License
• Copyright

This is an WizFi360/ESP8266/ESP32 wrapper library for Arduino providing an easy-to-use way to manipulate WizFi360/ESP8266/ESP32-AT shields.

This library is based on, modified and improved from ITEADLIB_Arduino_WeeESP8266

This ESP_AT_Lib library currently supports these following boards:

1. nRF52 boards, such as AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox, etc.

2. SAM DUE

3. SAMD21

• Arduino SAMD21: ZERO, MKRs, NANO_33_IOT, etc.
• Adafruit SAMD21 (M0): ItsyBitsy M0, Feather M0, Feather M0 Express, Metro M0 Express, Circuit Playground Express, Trinket M0, PIRkey, Hallowing M0, Crickit M0, etc.
• Seeeduino: LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, etc.

4. SAMD51

• Adafruit SAMD51 (M4): Metro M4, Grand Central M4, ItsyBitsy M4, Feather M4 Express, Trellis M4, Metro M4 AirLift Lite, MONSTER M4SK Express, Hallowing M4, etc.
• Seeeduino: Wio Terminal, Grove UI Wireless

5. Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0, LC)

6. STM32F/L/H/G/WB/MP1 boards (with 64 K Flash)

• Nucleo-144
• Nucleo-64
• Discovery
• Generic STM32F0, STM32F1, STM32F2, STM32F3, STM32F4, STM32F7 (with 64 K Flash): x8 and up
• STM32L0, STM32L1, STM32L4, STM32L5
• STM32G0, STM32G4
• STM32H7
• STM32WB
• STM32MP1
• LoRa boards
• 3-D printer boards
• Generic Flight Controllers
• Midatronics boards

7. SIPEED_MAIX_DUINO boards

8. RP2040-based boards, such as RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040 using Earle Philhower's arduino-pico core v1.4.0 or Arduino-mbed RP2040 core.

9. RP2040-based boards, such as Nano_RP2040_Connect using Arduino-mbed RP2040 core.

10. WIZNET_WIZFI360_EVB_PICO using Earle Philhower's arduino-pico core

1. ESP8266-AT-command shield
2. ESP32-AT-command shield
3. W600 and WIS600-01S AT-command shield
4. WizFi360 AT-command shield

1. Arduino IDE 1.8.19 for Arduino.
2. Arduino AVR core 1.8.6 for Arduino (Use Arduino Board Manager) for AVR boards.
3. Arduino Core for STM32 v2.4.0 for STM32F/L/H/G/WB/MP1 boards (Nucleo-144 NUCLEO_F767ZI, Nucleo-64 NUCLEO_L053R8, etc.).
4. Teensy core v1.57 for Teensy 4.1.
5. Arduino SAM DUE core v1.6.12 for SAM DUE ARM Cortex-M3 boards.
6. Arduino SAMD core 1.8.13 for SAMD ARM Cortex-M0 boards.
7. Adafruit SAMD core 1.7.11 for SAMD ARM Cortex-M0 and M4 boards (Nano 33 IoT, etc.).
8. Seeeduino SAMD core 1.8.3 for SAMD21/SAMD51 boards (XIAO M0, Wio Terminal, etc.).
9. Adafruit nRF52 v1.3.0 for nRF52 boards such as Adafruit NRF52840_FEATHER, NRF52832_FEATHER, NRF52840_FEATHER_SENSE, NRF52840_ITSYBITSY, NRF52840_CIRCUITPLAY, NRF52840_CLUE, NRF52840_METRO, NRF52840_PCA10056, PARTICLE_XENON, NINA_B302_ublox, etc.
10. Arduino mbed_rp2040 core 3.5.4 for Arduino RP2040-based boards, such as Arduino Nano RP2040 Connect, RASPBERRY_PI_PICO, etc..
11. Earle Philhower's arduino-pico core v2.7.1 for RP2040-based boards such as RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040, etc.
12. Ai-Thinker AT Firmware v1.5.4 or AT Firmware v1.7.4.0 for ESP8266-AT shields.
13. AT version_2.1.0.0_dev for ESP32-AT shields.
14. AT version_1.1.4 for WIS600-01S and W600-AT WiFi shields
15. AT version:1.1.1.7 for WizFi360 WiFi shields

• Ai-Thinker AT Firmware v1.5.4

  AT version:1.1.0.0(May 11 2016 18:09:56)
  SDK version:1.5.4(baaeaebb)
  Ai-Thinker Technology Co. Ltd.
  Jun 13 2016 11:29:20

• AT Firmware v1.7.4.0

  AT version:1.7.4.0(May 11 2020 19:13:04)
  SDK version:3.0.4(9532ceb)
  compile time:May 27 2020 10:12:17
  Bin version(Wroom 02):1.7.4

• WIS600-01S and W600 using either ESP8266 or ESP32-AT commands and stock firmware

  AT version:1.1.4(Dec 05 2018 11:06:45)
  SDK version:3.0.0
  Dec 05 2018 11:06:45

• AT version_2.1.0.0_dev

  AT version:2.1.0.0-dev(4f6b92c - Jun 10 2020 10:36:54)
  SDK version:v4.0.1-193-ge7ac221b4
  compile time(b85a8df):Jun 18 2020 14:00:59
  Bin version:2.0.0(WROOM-32)

  See instructions at AT Command Core and ESP_AT_Get_Started

```cpp
FW Version:AT version:1.1.1.7(May  4 2021 15:14:59)
SDK version:3.2.0(a0ffff9f)
compile time:May  4 2021 15:14:59
``` 

4. Upload AT Firmware v1.7.4.0 bin files to correct locations as follows:

# BOOT MODE

### Flash size 8Mbit: 512KB 512KB
    boot_v1.2 .bin              0x00000
    user1.1024.new.2.bin        0x01000
    esp_init_data_default.bin   0xfc000
    blank.bin                   0x7e000 & 0xfe000


### Flash size 16Mbit-C1: 1024KB 1024KB
    boot_v1.2 .bin              0x00000
    user1.2048.new.5.bin        0x01000
    esp_init_data_default.bin   0x1fc000
    blank.bin                   0xfe000 & 0x1fe000

5. Test before using different AT-Firmware Version at your own risks. Just use any simple example to verify if the AT-firmware is OK.
6. Compatible AT-Firmare version will be updated. Check for all supported AT Firmwares and download them from AT_Firmwares.
7. Support to ESP32-AT-command shields will be added by using new library ESP_AT_Lib to replace Blynk's BlynkESP8266_Lib.

The best and easiest way is to use Arduino Library Manager. Search for ESP_AT_Lib, then select / install the latest version. You can also use this link for more detailed instructions.

Another way to install is to:

1. Navigate to ESP_AT_Lib page.
2. Download the latest release ESP_AT_Lib-master.zip.
3. Extract the zip file to ESP_AT_Lib-master directory
4. Copy whole ESP_AT_Lib-master/src folder to Arduino libraries' directory such as ~/Arduino/libraries/.

1. Install VS Code
2. Install PlatformIO
3. Install ESP_AT_Lib library by using Library Manager. Search for ESP_AT_Lib in Platform.io Author's Libraries
4. Use included platformio.ini file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at Project Configuration File

To be able to compile, run and automatically detect and display BOARD_NAME on nRF52840/nRF52832 boards, you have to copy the whole nRF52 Packages_Patches directory into Adafruit nRF52 directory (~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0).

Supposing the Adafruit nRF52 version is 1.3.0. These files must be copied into the directory:

• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/platform.txt
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/boards.txt
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/cores/nRF5/Udp.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/cores/nRF5/Print.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/cores/nRF5/Print.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/variants/NINA_B302_ublox/variant.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/variants/NINA_B302_ublox/variant.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/variants/NINA_B112_ublox/variant.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/variants/NINA_B112_ublox/variant.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/1.3.0/cores/nRF5/Udp.h

Whenever a new version is installed, remember to copy these files into the new version directory. For example, new version is x.yy.z These files must be copied into the directory:

• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/platform.txt
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/boards.txt
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/cores/nRF5/Udp.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/cores/nRF5/Print.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/cores/nRF5/Print.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B302_ublox/variant.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B302_ublox/variant.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B112_ublox/variant.h
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B112_ublox/variant.cpp
• ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/cores/nRF5/Udp.h

To be able to compile and run on Teensy boards, you have to copy the files in Packages_Patches for Teensy directory into Teensy hardware directory (./arduino-1.8.19/hardware/teensy/avr/boards.txt).

Supposing the Arduino version is 1.8.19. These files must be copied into the directory:

• ./arduino-1.8.19/hardware/teensy/avr/boards.txt
• ./arduino-1.8.19/hardware/teensy/avr/cores/teensy/Stream.h
• ./arduino-1.8.19/hardware/teensy/avr/cores/teensy3/Stream.h
• ./arduino-1.8.19/hardware/teensy/avr/cores/teensy4/Stream.h

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz These files must be copied into the directory:

• ./arduino-x.yy.zz/hardware/teensy/avr/boards.txt
• ./arduino-x.yy.zz/hardware/teensy/avr/cores/teensy/Stream.h
• ./arduino-x.yy.zz/hardware/teensy/avr/cores/teensy3/Stream.h
• ./arduino-x.yy.zz/hardware/teensy/avr/cores/teensy4/Stream.h

To be able to compile and run on SAM DUE boards, you have to copy the whole SAM DUE directory into Arduino sam directory (~/.arduino15/packages/arduino/hardware/sam/1.6.12).

Supposing the Arduino SAM core version is 1.6.12. This file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/sam/1.6.12/platform.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/sam/x.yy.zz/platform.txt

To be able to compile, run and automatically detect and display BOARD_NAME on Arduino SAMD (Nano-33-IoT, etc) boards, you have to copy the whole Arduino SAMD Packages_Patches directory into Arduino SAMD directory (~/.arduino15/packages/arduino/hardware/samd/1.8.13).

Supposing the Arduino SAMD version is 1.8.13. Now only one file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/samd/1.8.13/platform.txt

Whenever a new version is installed, remember to copy this files into the new version directory. For example, new version is x.yy.zz

This file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/samd/x.yy.zz/platform.txt

Supposing the Arduino SAMD version is 1.8.9. These files must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/samd/1.8.9/platform.txt
• ~/.arduino15/packages/arduino/hardware/samd/1.8.9/cores/arduino/Arduino.h

Whenever a new version is installed, remember to copy these files into the new version directory. For example, new version is x.yy.z

These files must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/samd/x.yy.z/platform.txt
• ~/.arduino15/packages/arduino/hardware/samd/x.yy.z/cores/arduino/Arduino.h

This is mandatory to fix the notorious Arduino SAMD compiler error. See Improve Arduino compatibility with the STL (min and max macro)

 ...\arm-none-eabi\include\c  \7.2.1\bits\stl_algobase.h:243:56: error: macro "min" passed 3 arguments, but takes just 2
     min(const _Tp& __a, const _Tp& __b, _Compare __comp)

Whenever the above-mentioned compiler error issue is fixed with the new Arduino SAMD release, you don't need to copy the Arduino.h file anymore.

To be able to compile, run and automatically detect and display BOARD_NAME on Adafruit SAMD (Itsy-Bitsy M4, etc) boards, you have to copy the whole Adafruit SAMD Packages_Patches directory into Adafruit samd directory (~/.arduino15/packages/adafruit/hardware/samd/1.7.11).

Supposing the Adafruit SAMD core version is 1.7.11. These files must be copied into the directory:

• ~/.arduino15/packages/adafruit/hardware/samd/1.7.11/platform.txt
• ~/.arduino15/packages/adafruit/hardware/samd/1.7.11/cores/arduino/Print.h
• ~/.arduino15/packages/adafruit/hardware/samd/1.7.11/cores/arduino/Print.cpp

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz These files must be copied into the directory:

• ~/.arduino15/packages/adafruit/hardware/samd/x.yy.zz/platform.txt
• ~/.arduino15/packages/adafruit/hardware/samd/x.yy.zz/cores/arduino/Print.h
• ~/.arduino15/packages/adafruit/hardware/samd/x.yy.zz/cores/arduino/Print.cpp

To be able to compile, run and automatically detect and display BOARD_NAME on Seeeduino SAMD (XIAO M0, Wio Terminal, etc) boards, you have to copy the whole Seeeduino SAMD Packages_Patches directory into Seeeduino samd directory (~/.arduino15/packages/Seeeduino/hardware/samd/1.8.3).

Supposing the Seeeduino SAMD core version is 1.8.3. These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/samd/1.8.3/platform.txt
• ~/.arduino15/packages/Seeeduino/hardware/samd/1.8.3/cores/arduino/Arduino.h
• ~/.arduino15/packages/Seeeduino/hardware/samd/1.8.3/cores/arduino/Print.h
• ~/.arduino15/packages/Seeeduino/hardware/samd/1.8.3/cores/arduino/Print.cpp

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/platform.txt
• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/cores/arduino/Arduino.h
• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/cores/arduino/Print.h
• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/cores/arduino/Print.cpp

For Generic STM32F4 series boards, such as STM32F407VE, using LAN8720, please use STM32 core v2.2.0 as breaking core v2.3.0 creates the compile error.

To use LAN8720 on some STM32 boards

• Nucleo-144 (F429ZI, NUCLEO_F746NG, NUCLEO_F746ZG, NUCLEO_F756ZG)
• Discovery (DISCO_F746NG)
• STM32F4 boards (BLACK_F407VE, BLACK_F407VG, BLACK_F407ZE, BLACK_F407ZG, BLACK_F407VE_Mini, DIYMORE_F407VGT, FK407M1)

you have to copy the files stm32f4xx_hal_conf_default.h and stm32f7xx_hal_conf_default.h into STM32 stm32 directory (~/.arduino15/packages/STM32/hardware/stm32/2.2.0/system) to overwrite the old files.

Supposing the STM32 stm32 core version is 2.2.0. These files must be copied into the directory:

• ~/.arduino15/packages/STM32/hardware/stm32/2.2.0/system/STM32F4xx/stm32f4xx_hal_conf_default.h for STM32F4.
• ~/.arduino15/packages/STM32/hardware/stm32/2.2.0/system/STM32F7xx/stm32f7xx_hal_conf_default.h for Nucleo-144 STM32F7.

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz, these files must be copied into the corresponding directory:

• ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/system/STM32F4xx/stm32f4xx_hal_conf_default.h
• ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/system/STM32F7xx/stm32f7xx_hal_conf_default.h

To use Serial1 on some STM32 boards without Serial1 definition (Nucleo-144 NUCLEO_F767ZI, Nucleo-64 NUCLEO_L053R8, etc.) boards, you have to copy the files STM32 variant.h into STM32 stm32 directory (~/.arduino15/packages/STM32/hardware/stm32/2.3.0). You have to modify the files corresponding to your boards, this is just an illustration how to do.

Supposing the STM32 stm32 core version is 2.3.0. These files must be copied into the directory:

• ~/.arduino15/packages/STM32/hardware/stm32/2.3.0/variants/STM32F7xx/F765Z(G-I)T_F767Z(G-I)T_F777ZIT/NUCLEO_F767ZI/variant.h for Nucleo-144 NUCLEO_F767ZI.
• ~/.arduino15/packages/STM32/hardware/stm32/2.3.0/variants/STM32L0xx/L052R(6-8)T_L053R(6-8)T_L063R8T/NUCLEO_L053R8/variant.h for Nucleo-64 NUCLEO_L053R8.

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz, these files must be copied into the corresponding directory:

• ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/STM32F7xx/F765Z(G-I)T_F767Z(G-I)T_F777ZIT/NUCLEO_F767ZI/variant.h
• ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/STM32L0xx/L052R(6-8)T_L053R(6-8)T_L063R8T/NUCLEO_L053R8/variant.h

To be able to automatically detect and display BOARD_NAME on RP2040-based boards (RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040, GENERIC_RP2040, etc) boards, you have to copy the file RP2040 platform.txt into rp2040 directory (~/.arduino15/packages/rp2040/hardware/rp2040/1.4.0).

Supposing the rp2040 core version is 1.4.0. This file must be copied into the directory:

• ~/.arduino15/packages/rp2040/hardware/rp2040/1.4.0/platform.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

• ~/.arduino15/packages/rp2040/hardware/rp2040/x.yy.zz/platform.txt

With core after v1.5.0, this step is not necessary anymore thanks to the PR Add -DBOARD_NAME="{build.board}" #136.

Some libraries, such as Adafruit DHT-sensor-library, require the definition of microsecondsToClockCycles(). To be able to compile and run on RP2040-based boards, you have to copy the files in RP2040 Arduino.h into rp2040 directory (~/.arduino15/packages/rp2040/hardware/rp2040/1.4.0).

Supposing the rp2040 core version is 1.4.0. This file must be copied to replace:

• ~/.arduino15/packages/rp2040/hardware/rp2040/1.4.0/cores/rp2040/Arduino.h

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied to replace:

• ~/.arduino15/packages/rp2040/hardware/rp2040/x.yy.zz/cores/rp2040/Arduino.h

With core after v1.5.0, this step is not necessary anymore thanks to the PR Add defs for compatibility #142.

To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.), you have to copy the file portenta_post_install.sh into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1/portenta_post_install.sh).

Then run the following command using sudo

$ cd ~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1
$ chmod 755 portenta_post_install.sh
$ sudo ./portenta_post_install.sh

This will create the file /etc/udev/rules.d/49-portenta_h7.rules as follows:

# Portenta H7 bootloader mode UDEV rules

SUBSYSTEMS=="usb", ATTRS{idVendor}=="2341", ATTRS{idProduct}=="035b", GROUP="plugdev", MODE="0666"

Supposing the ArduinoCore-mbed core version is 3.4.1. Now only one file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/mbed_portenta/3.4.1/portenta_post_install.sh

Whenever a new version is installed, remember to copy this files into the new version directory. For example, new version is x.yy.zz

This file must be copied into the directory:

• ~/.arduino15/packages/arduino/hardware/mbed_portenta/x.yy.zz/portenta_post_install.sh

To avoid compile error relating to PROGMEM, you have to copy the file Realtek AmebaD core pgmspace.h into Realtek AmebaD directory (~/.arduino15/packages/realtek/hardware/AmebaD/3.1.4/cores/ambd/avr/pgmspace.h).

Supposing the Realtek AmebaD core version is 3.1.4. This file must be copied into the directory:

• ~/.arduino15/packages/realtek/hardware/AmebaD/3.1.4/cores/ambd/avr/pgmspace.h

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

• ~/.arduino15/packages/realtek/hardware/AmebaD/x.yy.zz/cores/ambd/avr/pgmspace.h

To avoid compile error relating to SAMD21/SAMD51, you have to copy the file ArduinoCore-fab-sam core pgmspace.h into ArduinoCore-fab-sam samd directory (~/.arduino15/packages/Fab_SAM_Arduino/hardware/samd/1.9.0/boards.txt).

Supposing the ArduinoCore-fab-sam samd core version is 1.9.0. This file must be copied into the directory:

• ~/.arduino15/packages/Fab_SAM_Arduino/hardware/samd/1.9.0/boards.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

• ~/.arduino15/packages/Fab_SAM_Arduino/hardware/samd/x.yy.zz/boards.txt

To be able to compile, run and automatically detect and display BOARD_NAME on Seeeduino RP2040 (XIAO RP2040, Wio RP2040 Mini) boards, you have to copy the whole Seeeduino RP2040 Packages_Patches directory into Seeeduino samd directory (~/.arduino15/packages/Seeeduino/hardware/rp2040/2.7.2).

Supposing the Seeeduino RP2040 core version is 2.7.2. These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/rp2040/2.7.2/boards.txt
• ~/.arduino15/packages/Seeeduino/hardware/rp2040/2.7.2/variants/Seeed_XIAO_RP2040/pins_arduino.h

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/boards.txt
• ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/variants/Seeed_XIAO_RP2040/pins_arduino.h

To be able to compile and run on Xiao nRF52840 boards, you have to copy the whole nRF52 1.0.0 directory into Seeeduino nRF52 directory (~/.arduino15/packages/Seeeduino/hardware/nrf52/1.0.0).

Supposing the Seeeduino nRF52 version is 1.0.0. These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/nrf52/1.0.0/platform.txt
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/1.0.0/cores/nRF5/Print.h
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/1.0.0/cores/nRF5/Print.cpp
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/1.0.0/cores/nRF5/Udp.h

Whenever a new version is installed, remember to copy these files into the new version directory. For example, new version is x.yy.z These files must be copied into the directory:

• ~/.arduino15/packages/Seeeduino/hardware/nrf52/x.yy.z/platform.txt
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/x.yy.z/cores/nRF5/Print.h
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/x.yy.z/cores/nRF5/Print.cpp
• ~/.arduino15/packages/Seeeduino/hardware/nrf52/x.yy.z/cores/nRF5/Udp.h

On the home page of API documentation, the tabs of Examples, Classes and Modules will be useful for Arduino lovers.

bool 	kick (void) : Verify ESP8266 whether live or not.
 
bool 	restart (void) : Restart ESP8266 by "AT RST".
 
String 	getVersion (void) : Get the version of AT Command Set.
 
bool 	setOprToStation (void) : Set operation mode to station.
 
bool 	setOprToSoftAP (void) : Set operation mode to softap.
 
bool 	setOprToStationSoftAP (void) : Set operation mode to station   softap.

uint8_t  getOprMode(void) : Get the operation mode.
 
String 	getAPList (void) : Search available AP list and return it.
 
bool 	joinAP (String ssid, String pwd) : Join in AP. 
 
bool 	leaveAP (void) : Leave AP joined before. 
 
bool 	setSoftAPParam (String ssid, String pwd, uint8_t chl=7, uint8_t ecn=4) : Set SoftAP parameters. 
 
String 	getJoinedDeviceIP (void) : Get the IP list of devices connected to SoftAP. 
 
String 	getIPStatus (void) : Get the current status of connection(UDP and TCP). 
 
String 	getLocalIP (void) : Get the IP address of ESP8266. 
 
bool 	enableMUX (void) : Enable IP MUX(multiple connection mode). 
 
bool 	disableMUX (void) : Disable IP MUX(single connection mode). 
 
bool 	createTCP (String addr, uint32_t port) : Create TCP connection in single mode. 
 
bool 	releaseTCP (void) : Release TCP connection in single mode. 
 
bool 	registerUDP (String addr, uint32_t port) : Register UDP port number in single mode. 
 
bool 	unregisterUDP (void) : Unregister UDP port number in single mode. 
 
bool 	createTCP (uint8_t mux_id, String addr, uint32_t port) : Create TCP connection in multiple mode. 
 
bool 	releaseTCP (uint8_t mux_id) : Release TCP connection in multiple mode. 
 
bool 	registerUDP (uint8_t mux_id, String addr, uint32_t port) : Register UDP port number in multiple mode. 
 
bool 	unregisterUDP (uint8_t mux_id) : Unregister UDP port number in multiple mode. 
 
bool 	setTCPServerTimeout (uint32_t timeout=180) : Set the timeout of TCP Server. 

bool 	startServer (uint32_t port=333) ： Start Server(Only in multiple mode).

bool 	stopServer (void) : Stop Server(Only in multiple mode).

bool 	startTCPServer (uint32_t port=333) : Start TCP Server(Only in multiple mode). 
 
bool 	stopTCPServer (void) : Stop TCP Server(Only in multiple mode). 
 
bool 	send (const uint8_t *buffer, uint32_t len) : Send data based on TCP or UDP built already in single mode. 
 
bool 	send (uint8_t mux_id, const uint8_t *buffer, uint32_t len) : Send data based on one of TCP or UDP built already in multiple mode. 

bool 	sendFromFlash (const uint8_t *buffer, uint32_t len) : Send data based on TCP or UDP built already in single mode. 
 
bool 	sendFromFlash (uint8_t mux_id, const uint8_t *buffer, uint32_t len) : Send data based on one of TCP or UDP built already in multiple mode. 
 
uint32_t 	recv (uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from TCP or UDP built already in single mode. 
 
uint32_t 	recv (uint8_t mux_id, uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from one of TCP or UDP built already in multiple mode. 
 
uint32_t 	recv (uint8_t *coming_mux_id, uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from all of TCP or UDP built already in multiple mode. 

ESP_AT_Lib library only needs an UART for hardware connection. All communications are done via UART. In each example, you must specify the UART used by mainboard to communicate with ESP8266/ESP32-AT firmware.

For MEGA and SAM DUE, Serial1 or Serial3 will be used if you create an object (named wifi) of class ESP8266 in your code like this:

#include "ESP_AT_Lib.h"
ESP8266 wifi(&Serial1);

The connection should be like these:

The size of data from ESP8266/ESP32-AT is sometimes too big for Arduino boards, so the library can't receive the whole buffer because the size of the hardware serial buffer, defined in HardwareSerial.h, is too small.

The SERIAL_TX_BUFFER_SIZE and SERIAL_RX_BUFFER_SIZE are already redefined to 256 for Mega, and 2048 for other boards

#if ( defined(ARDUINO_AVR_ADK) || defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560) )
  #if defined(SERIAL_TX_BUFFER_SIZE)
    #undef SERIAL_TX_BUFFER_SIZE
    #define SERIAL_TX_BUFFER_SIZE     256
  #endif
  
  #if defined(SERIAL_RX_BUFFER_SIZE)
    #undef SERIAL_RX_BUFFER_SIZE
    #define SERIAL_RX_BUFFER_SIZE     256
  #endif
#else
  #if defined(SERIAL_TX_BUFFER_SIZE)
    #undef SERIAL_TX_BUFFER_SIZE
    #define SERIAL_TX_BUFFER_SIZE     2048
  #endif
  
  #if defined(SERIAL_RX_BUFFER_SIZE)
    #undef SERIAL_RX_BUFFER_SIZE
    #define SERIAL_RX_BUFFER_SIZE     2048
  #endif
#endif

1. ConnectWiFi
2. HTTPGET
3. TCPClientSingle
4. TCPClientMultiple
5. TCPServer
6. UDPClientSingle
7. UDPClientMultiple

This is the terminal output when running HTTPGET example on RASPBERRY_PI_PICO with ESP8266-AT shield, using arduino-pico core

Start HTTPGET on RASPBERRY_PI_PICO
ESP_AT_Lib v1.5.1
FW Version:AT GMR
AT version:1.7.4.0(May 11 2020 19:13:04)
SDK version:3.0.4(9532ceb)
compile time:May 27 2020 10:12:17
Bin version(Wroom 02):1.7.4
OK
Set AP/STA Mode OK
Connect to WiFi OK
IP: AT CIFSR
 CIFSR:APIP,"192.168.4.1"
 CIFSR:APMAC,"6a:c6:3a:a6:f0:f1"
 CIFSR:STAIP,"192.168.2.185"
 CIFSR:STAMAC,"68:c6:3a:a6:f0:f1"
disableMUX OK
Done
Create TCP OK
=========================Received============================
HTTP/1.1 200 OK
Server: nginx/1.4.2
Date: Tue, 11 May 2021 04:02:24 GMT
Content-Type: text/plain
Content-Length: 2263
Last-Modified: Wed, 02 Oct 2013 13:46:47 GMT
Connection: close
Vary: Accept-Encoding
ETag: "524c23c7-8d7"
Accept-Ranges: bytes


           `:;;;,`                      .:;;:.           
        .;;;;;;;;;;;`                :;;;;;;;;;;:     TM 
      `;;;;;;;;;;;;;;;`            :;;;;;;;;;;;;;;;      
     :;;;;;;;;;;;;;;;;;;         `;;;;;;;;;;;;;;;;;;     
    ;;;;;;;;;;;;;;;;;;;;;       .;;;;;;;;;;;;;;;;;;;;    
   ;;;;;;;;:`   `;;;;;;;;;     ,;;;;;;;;.`   .;;;;;;;;   
  .;;;;;;,         :;;;;;;;   .;;;;;;;          ;;;;;;;  
  ;;;;;;             ;;;;;;;  ;;;;;;,            ;;;;;;. 
 ,;;;;;               ;;;;;;.;;;;;;`              ;;;;;; 
 ;;;;;.                ;;;;;;;;;;;`      ```       ;;;;;`
 ;;;;;                  ;;;;;;;;;,       ;;;       .;;;;;
`;;;;:                  `;;;;;;;;        ;;;        ;;;;;
,;;;;`    `,,,,,,,,      ;;;;;;;      .,,;;;,,,     ;;;;;
:;;;;`    .;;;;;;;;       ;;;;;,      :;;;;;;;;     ;;;;;
:;;;;`    .;;;;;;;;      `;;;;;;      :;;;;;;;;     ;;;;;
.;;;;.                   ;;;;;;;.        ;;;        ;;;;;
 ;;;;;                  ;;;;;;;;;        ;;;        ;;;;;
 ;;;;;                 .;;;;;;;;;;       ;;;       ;;;;;,
 ;;;;;;               `;;;;;;;;;;;;                ;;;;; 
 `;;;;;,             .;;;;;; ;;;;;;;              ;;;;;; 
  ;;;;;;:           :;;;;;;.  ;;;;
============================================================

This is the terminal output when running HTTPGET example on RASPBERRY_PI_PICO with ESP8266-AT shield, using Arduino-mbed RP2040 core.

Start HTTPGET on MBED RASPBERRY_PI_PICO
ESP_AT_Lib v1.5.1
FW Version:AT version:1.7.4.0(May 11 2020 19:13:04)
SDK version:3.0.4(9532ceb)
compile time:May 27 2020 10:12:17
Bin version(Wroom 02):1.7.4
OK
Set AP/STA Mode OK
Connect to WiFi OK
IP:  CIFSR:APIP,"192.168.4.1"
 CIFSR:APMAC,"6a:c6:3a:a6:f0:f1"
 CIFSR:STAIP,"192.168.2.76"
 CIFSR:STAMAC,"68:c6:3a:a6:f0:f1"
disableMUX OK
Done
Create TCP OK
=========================Received============================
HTTP/1.1 200 OK
Server: nginx/1.4.2
Date: Tue, 18 May 2021 00:00:44 GMT
Content-Type: text/plain
Content-Length: 2263
Last-Modified: Wed, 02 Oct 2013 13:46:47 GMT
Connection: close
Vary: Accept-Encoding
ETag: "524c23c7-8d7"
Accept-Ranges: bytes


           `:;;;,`                      .:;;:.           
        .;;;;;;;;;;;`                :;;;;;;;;;;:     TM 
      `;;;;;;;;;;;;;;;`            :;;;;;;;;;;;;;;;      
     :;;;;;;;;;;;;;;;;;;         `;;;;;;;;;;;;;;;;;;     
    ;;;;;;;;;;;;;;;;;;;;;       .;;;;;;;;;;;;;;;;;;;;    
   ;;;;;;;;:`   `;;;;;;;;;     ,;;;;;;;;.`   .;;;;;;;;   
  .;;;;;;,         :;;;;;;;   .;;;;;;;          ;;;;;;;  
  ;;;;;;             ;;;;;;;  ;;;;;;,            ;;;;;;. 
 ,;;;;;               ;;;;;;.;;;;;;`              ;;;;;; 
 ;;;;;.                ;;;;;;;;;;;`      ```       ;;;;;`
 ;;;;;                  ;;;;;;;;;,       ;;;       .;;;;;
`;;;;:                  `;;;;;;;;        ;;;        ;;;;;
,;;;;`    `,,,,,,,,      ;;;;;;;      .,,;;;,,,     ;;;;;
:;;;;`    .;;;;;;;;       ;;;;;,      :;;;;;;;;     ;;;;;
:;;;;`    .;;;;;;;;      `;;;;;;      :;;;;;;;;     ;;;;;
.;;;;.                   ;;;;;;;.        ;;;        ;;;;;
 ;;;;;                  ;;;;;;;;;        ;;;        ;;;;;
 ;;;;;                 .;;;;;;;;;;       ;;;       ;;;;;,
 ;;;;;;               `;;;;;;;;;;;;                ;;;;; 
 `;;;;;,             .;;;;;; ;;;;;;;              ;;;;;; 
  ;;;;;;:           :;;;;;;.  ;;;;;;;            ;;;;;;  
   ;;;;;;;`       .;;;;;;;,    ;;;;;;;;        ;;;;;;;:  
    ;;;;;;;;;:,:;;;;;;;;;:      ;;;;;;;;;;:,;;;;;;;;;;   
    `;;;;;;;;;;;;;;;;;;;.        ;;;;;;;;;;;;;;;;;;;;    
      ;;;;;;;;;;;;;;;;;           :;;;;;;;;;;;;;;;;:     
       ,;;;;;;;;;;;;;,              ;;;;;;;;;;;;;;       
         .;;;;;;;;;`                  ,;;;;;;;;:         
                                                         
                                                         
                                                         
                                                  
============================================================

This is the terminal output when running TCPServer example on WIZNET_WIZFI360_EVB_PICO, using arduino-pico core

Start TCPServer on WIZNET_WIZFI360_EVB_PICO
FW Version:AT GMR
AT version:1.1.1.7(May  4 2021 15:14:59)
SDK version:3.2.0(a0ffff9f)
compile time:May  4 2021 15:14:59
AT CWMODE?
Set AP/STA Mode OK
AT CWJAP_DEF="
Connect to WiFi OK
IP: AT CIFSR
 CIFSR:APIP,"192.168.100.1"
 CIFSR:APMAC,"02:08:dc:6d:9c:f0"
 CIFSR:STAIP,"192.168.2.125"
 CIFSR:STAMAC,"00:08:dc:6d:9c:f0"
AT CIPMUX=
enableMUX OK
AT CIPSERVER=1,
Start TCP server OK
AT CIPSTO=
Set TCP server timeout 10 seconds
Done
Status:[AT CIPSTATUS
STATUS:3
 CIPSTATUS:0,"TCP","192.168.2.30",34422,80,1
 CIPSTATUS:1,"UDP","192.168.2.30",5416,56469,0]
Received from :0
[GET / HTTP/1.1
Host: 192.168.2.125
Connection: keep-alive
Cache-Control: max-age=0
DNT: 1
Upgrade-Insecure-Requests: 1
Use]
AT CIPSEND=
Send back OK
AT CIPCLOSE=
Release TCP 0 OK
Status:[AT CIPSTATUS
STATUS:3
 CIPSTATUS:1,"UDP","192.168.2.30",5416,56469,0]
Status:[AT CIPSTATUS
STATUS:3
 CIPSTATUS:0,"TCP","192.168.2.30",34578,80,1
 CIPSTATUS:1,"UDP","192.168.2.30",5416,56469,0]
Received from :0
[GET / HTTP/1.1
Host: 192.168.2.125
Connection: keep-alive
Cache-Control: max-age=0
DNT: 1
Upgrade-Insecure-Requests: 1
Use]
AT CIPSEND=
Send back OK
AT CIPCLOSE=
Release TCP 0 OK
Status:[AT CIPSTATUS
STATUS:3
 CIPSTATUS:1,"UDP","192.168.2.30",5416,56469,0]

Debug is disabled by default on Serial. To enable, add at the beginning of sketch

#define ESP_AT_LIB_DEBUG_OUTPUT       Serial

/* Comment this out to disable prints and save space */
#define _ESP_AT_LIB_LOGLEVEL_         4

If you get compilation errors, more often than not, you may need to install a newer version of the board's core, WizFi360/ESP8266/ESP32-AT shield AT-command or this library version.

Sometimes, the library will only work if you update the WizFi360/ESP8266/ESP32-AT shield core to the newer or older version because some function compatibility.

Submit issues to: ESP_AT_Lib issues

1. Fix bugs

1. Add ESP32-AT support
2. Replace deprecated AT commands
3. Add debug output with debug levels
4. Increase TX/RX Hardware Serial Buffer size
5. Test OK with supported boards, running Blynk, Config Portal
6. Add support to RP2040-based boards such as RASPBERRY_PI_PICO, using arduino-pico core
7. Add support to SIPEED_MAIX_DUINO
8. Add Table-of-Contents
9. Add Version String
10. Add support to RP2040-based boards, such as RASPBERRY_PI_PICO boards using arduino-pico core
11. Add support to RP2040-based boards, such as RASPBERRY_PI_PICO boards using Arduino-mbed RP2040 core
12. Add support to RP2040-based boards, such as Nano_RP2040_Connect using Arduino-mbed RP2040 core.
13. Add support to Adafruit nRF52 core v0.22.0
14. Add astyle using allman style. Restyle the library
15. Add support to WizNet WizFi360, such as WIZNET_WIZFI360_EVB_PICO using arduino-pico core

Please help contribute to this project and add your name here.

1. All the credits go to the original authors of the ITEADLIB_Arduino_WeeESP8266 Library.

If you want to contribute to this project:

• Report bugs and errors
• Ask for enhancements
• Create issues and pull requests
• Tell other people about this library

• The library is licensed under MIT

Copyright (c) 2020- Khoi Hoang