bbsmith24/esp32_credentials

set up ESP32 WiFi credentials and time from NTP

ESP32_Credentials

set up ESP32 WiFi credentials and time from NTP

First time running this creates an access point named ESP-WIFI-MANAGER. Connect to this, open a browser and enter the ip address created by the access point (192.168.4.1 by default). This will open a page allowing you to enter your WiFi credentials (SSID, password are required; IP and Gateway are optional) and timezone/DST offsets. Click 'Submit' and these values are stored in memory on the ESP32, and the ESP32 reboots to connect. After connecting, NTP server is queried for time, which is used to update the ESP32 RTC. loop() function writes current time to Serial every minute.

This can be used as the starting point for any project that requires a WiFi connection.

comment out '#define VERBOSE' to run in quiet mode using #define instead of const (HTML input parameters, SPIFFS filenames, NTP server name) saves some program space

Files: ESP32_Credentials.ino - program file data\wifimanager.html - html file for credentials/timezone page data\style.css - style sheet for presentation load the files in data using 'ESP32 Sketch Data Upload' in Arduino 1.8 'Tools' menu.

creates files in SPIFFS with data from wifimanager.html

ESP32_Credentials Functions: setup() - initialize LITTLEFS file system for load/store credentials and time info, initialize WiFi. Add any other initialization for new projects here

loop() - print current time to Serial every minute. Add whatever is needed for new projects here

LITTLEFS functions
	LITTLEFS_Init - initialize the LITTLEFS file system
	LITTLEFS_ReadFile - read a file, return contents as a String
	LITTLEFS_WriteFile - create a file using pathname and message
	LITTLEFS_ListDir - list files in LITTLEFS (for debugging)
	LITTLEFS_DeleteFile - delete a named file

WiFi_Init
	LoadCredentials - read credentials and timezone information from files in SPIFFS
	GetCredentials - create AP, load webpage to get credentials and timezone information, write to SPIFFS and reboot
	ClearCredentials - delete credentials files and reboot

Time functions
	UpdateLocalTime - first call, get time info from NTP server and save to RTC. Subsequent calls use RTC for time.
					  creates localTimeStr in mm/dd/yyyy hh:mm:ss
					  date/time in dayNum, monthNum, yearNum. hourNum, minNum, secNum integer values