Lite WiFiManager for Teensy,DUE,SAMD,STM32 using ESP8266 AT
Posted: Tue Mar 10, 2020 3:08 pmhttps://github.com/khoih-prog/ESP_AT_WM_Lite
How To Install Using Arduino Library Manager
This library is a Light Weight Credentials / WiFi Manager for ESP8266 AT shields, specially designed to support AVR Mega, STM32, Teensy, SAM DUE, SAMD, etc. boards running ESP8266 AT-command shields, with smaller memory (64+K bytes)
You can also specify static AP and STA IP. Use much less memory compared to full-fledge WiFiManager. Credentials are saved in EEPROM, FlashStorage or DueFlashStorage.
You can use this library when your boards have more than 32K bytes of memory, for example Mega 1280/2560, SAM DUE, BluePill/BlackPill F103C8 (64+K Bytes).
The web configuration portal, served from the ESP8266 AT-command shields is operating as an access point (AP) with configurable static IP address or use default IP Address of 192.168.4.1
Sample Code
This is the terminal output when running Teensy_ESP8266Shield example on Teensy 4.0
1. Open Config Portal
2. Got valid Credential from Config Portal, then connected to WiFi
And the Config Portal screens:
1.Main Screen
2. Input Credentials:
3. After pressing Save button
How To Install Using Arduino Library Manager
This library is a Light Weight Credentials / WiFi Manager for ESP8266 AT shields, specially designed to support AVR Mega, STM32, Teensy, SAM DUE, SAMD, etc. boards running ESP8266 AT-command shields, with smaller memory (64+K bytes)
You can also specify static AP and STA IP. Use much less memory compared to full-fledge WiFiManager. Credentials are saved in EEPROM, FlashStorage or DueFlashStorage.
You can use this library when your boards have more than 32K bytes of memory, for example Mega 1280/2560, SAM DUE, BluePill/BlackPill F103C8 (64+K Bytes).
The web configuration portal, served from the ESP8266 AT-command shields is operating as an access point (AP) with configurable static IP address or use default IP Address of 192.168.4.1
Sample Code
Code: Select all
/* Comment this out to disable prints and save space */
#define ESP_AT_DEBUG_OUTPUT Serial
#define ESP_AT_DEBUG true
#if ( defined(STM32F0) || defined(STM32F1) || defined(STM32F2) || defined(STM32F3) ||defined(STM32F4) || defined(STM32F7) )
#if defined(ESP8266_AT_USE_STM32)
#undef ESP8266_AT_USE_STM32
#endif
#define ESP8266_AT_USE_STM32 true
#endif
#if ( defined(ESP8266) || defined(ESP32) || defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560) || defined(CORE_TEENSY) || !(ESP8266_AT_USE_STM32) )
//#error This code is intended to run on STM32 platform! Please check your Tools->Board setting.
#endif
#if ESP8266_AT_USE_STM32
// For STM32, you have to declare and enable coreresponding Serial Port somewhere else before using it
#define EspSerial Serial1
#if defined(STM32F0)
#define BOARD_TYPE "STM32F0"
#error Board STM32F0 not supported
#elif defined(STM32F1)
#define BOARD_TYPE "STM32F1"
#elif defined(STM32F2)
#define BOARD_TYPE "STM32F2"
#elif defined(STM32F3)
#define BOARD_TYPE "STM32F3"
#elif defined(STM32F4)
#define BOARD_TYPE "STM32F4"
#elif defined(STM32F7)
#define BOARD_TYPE "STM32F7"
#else
#warning STM32 unknown board selected
#define BOARD_TYPE "STM32 Unknown"
#endif
#else
// For Mega
#define EspSerial Serial3
#define BOARD_TYPE "AVR Mega"
#endif
// Start location in EEPROM to store config data. Default 0
// Config data Size currently is 128 bytes)
#define EEPROM_START (64)
#include <Esp8266_AT_WM_Lite_STM32.h>
// Your STM32 <-> ESP8266 baud rate:
#define ESP8266_BAUD 115200
void heartBeatPrint(void)
{
static int num = 1;
if (WiFi.status() == WL_CONNECTED)
Serial.print("H"); // H means connected to WiFi
else
Serial.print("F"); // F means not connected to WiFi
if (num == 80)
{
Serial.println();
num = 1;
}
else if (num++ % 10 == 0)
{
Serial.print(" ");
}
}
void check_status()
{
static unsigned long checkstatus_timeout = 0;
//KH
#define HEARTBEAT_INTERVAL 10000L
// Print hearbeat every HEARTBEAT_INTERVAL (10) seconds.
if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
{
heartBeatPrint();
checkstatus_timeout = millis() + HEARTBEAT_INTERVAL;
}
}
ESP_AT_WiFiManager_Lite* ESP_AT_WiFiManager; //(&EspSerial, ESP8266_BAUD);
void setup()
{
// Debug console
Serial.begin(115200);
delay(1000);
Serial.println("\nStart STM32_ESP8266Shield on " + String(BOARD_TYPE));
// initialize serial for ESP module
EspSerial.begin(115200);
ESP_AT_WiFiManager = new ESP_AT_WiFiManager_Lite(&EspSerial, ESP8266_BAUD);
// Optional to change default AP IP(192.168.4.1) and channel(10)
//ESP_AT_WiFiManager->setConfigPortalIP(IPAddress(192, 168, 120, 1));
//ESP_AT_WiFiManager->setConfigPortalChannel(1);
ESP_AT_WiFiManager->begin();
}
void loop()
{
ESP_AT_WiFiManager->run();
check_status();
}
This is the terminal output when running Teensy_ESP8266Shield example on Teensy 4.0
1. Open Config Portal
Code: Select all
Start Teensy_ESP8266Shield on TEENSY 4.0
*AT: CCsum=5543,RCsum=1127042391
*AT: Init EEPROM sz=1080
*AT: Open Portal
*AT: SSID=ESP_AT_CCE61, PW=MyESP_AT_CCE61
*AT: IP=192.168.4.1, CH=10
FFF
2. Got valid Credential from Config Portal, then connected to WiFi
Code: Select all
Start Teensy_ESP8266Shield on TEENSY 4.0
*AT: CCsum=2271,RCsum=2271
*AT: Hdr=SHD_ESP8266, SSID=HueNet1, PW=****
*AT: con2WF:start
*AT: con2WF:spent millis=0
*AT: Con2 HueNet1
*AT: IP=192.168.2.82
*AT: WiFi OK
*AT: con2WF:OK
*AT: IP=192.168.2.82
*AT: WiFi OK
HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH
HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH HHHHHHHHHH
And the Config Portal screens:
1.Main Screen
2. Input Credentials:
3. After pressing Save button