ESP_AT_WM_Lite

Why do we need this ESP_AT_WM_Lite library

Features

This library is a Light Weight Credentials / WiFi Manager for ESP8266/ESP32-AT shields, specially designed to support AVR Mega, SAM DUE, SAMD21, SAMD51, nRF52, STM32F/L/H/G/WB/MP1, etc. boards running ESP8266/ESP32-AT-command shields. with smaller memory (64+K bytes)

The RP2040-based boards, such as Nano_RP1040_Connect, RASPBERRY_PI_PICO, are currently supported using Earle Philhower's arduino-pico core or Arduino-mbed RP2040 core with Blynk/WiFiManager features thanks to LittleFS support.

Other AVR-family boards (UNO, Nano, etc.) are not supported as they don't have enough memory to run Config Portal WebServer.

This ESP_AT_WM_Lite library is a Credentials / WiFi Connection Manager, permitting the addition of custom parameters to be configured in Config Portal. The parameters then will be saved automatically, without the complicated callback functions to handle data saving / retrieving.

If you have used one of the full-fledge WiFiManagers such as :

1. Tzapu WiFiManager
2. Ken Taylor WiFiManager
3. Khoi Hoang ESP_WiFiManager

and have to write complicated callback functions to save custom parameters in SPIFFS/LittleFS/EEPROM, you'd appreciate the simplicity of this Light-Weight Credentials / WiFiManager.

You can also specify static AP and STA IP. Use much less memory compared to full-fledge WiFiManager. Config Portal will be auto-adjusted to match the number of dynamic custom parameters. Credentials are saved in EEPROM, FlashStorage_SAMD, FlashStorage_STM32, DueFlashStorage or nRF52 LittleFS.

The web configuration portal, served from the ESP32/ESP8266-AT WiFi is operating as an access point (AP) with configurable static IP address or use default IP Address of 192.168.4.1

New recent features:

• MultiWiFi feature for configuring/auto(re)connecting ESP32/ESP8266-AT WiFi to the available MultiWiFi APs at runtime.
• DoubleDetectDetector feature to force Config Portal when double reset is detected within predetermined time, default 10s.
• Powerful-yet-simple-to-use feature to enable adding dynamic custom parameters from sketch and input using the same Config Portal. Config Portal will be auto-adjusted to match the number of dynamic parameters.
• Optional default Credentials as well as Dynamic parameters to be optionally autoloaded into Config Portal to use or change instead of manually input.
• Dynamic custom parameters to be saved automatically in non-volatile memory, such as EEPROM, FlashStorage_SAMD, FlashStorage_STM32, DueFlashStorage or nRF52 LittleFS..
• Configurable Config Portal Title to be either BoardName or default undistinguishable names.
• Examples are designed to separate Credentials / Defines / Dynamic Params / Code, so that you can change Credentials / Dynamic Params quickly for each device.
• To permit autoreset after configurable timeout if DRD/MRD or non-persistent forced-CP
• Use new nRF52 LittleFS, SAMD FlashStorage_SAMD and STM32F/L/H/G/WB/MP1 FlashStorage_STM32 features
• Scan WiFi networks for selection in Configuration Portal

Currently Supported Boards

This ESP_AT_WM_Lite library currently supports these following boards:

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.

SAM DUE

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.

1. 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

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

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

RP2040-based boards, such as Nano RP2040 Connect, using Arduino mbed OS for Nano boards.

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

WIZNET_WIZFI360_EVB_PICO using Earle Philhower's arduino-pico core