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February 23, 2020 06:57
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Implementation of Resettable EEPROM config using external button Arduino Platform
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| /* | |
| IoT.ino -- Example code for demonstration only. | |
| Written by Rosmianto A. Saputro. Aug 25, 2017. | |
| To do list: | |
| * Implement OTA | |
| * Implement Server/client code. | |
| * Implement EEPROM update code. | |
| */ | |
| #include <EEPROM.h> | |
| #include <ESP8266WiFi.h> | |
| #include <ESP8266WebServer.h> | |
| #define ROLE_FLAG_ADDRESS 0 | |
| #define CLEAR D1 | |
| byte role_value; | |
| // Things that need to be stored in EEPROM | |
| String SSID = ""; | |
| String password = ""; | |
| String host = ""; | |
| String port = ""; | |
| ESP8266WebServer server(80); | |
| void setup() { | |
| pinMode(CLEAR, INPUT_PULLUP); | |
| EEPROM.begin(512); // Initialize 512 bytes of EEPROM block. | |
| Serial.begin(115200); | |
| Serial.println("\n\nDevice is starting up."); | |
| if(digitalRead(CLEAR) == LOW){ // Clear prev. configuration | |
| Serial.print("Clearing configuration... "); | |
| EEPROM.write(ROLE_FLAG_ADDRESS, 0); | |
| EEPROM.commit(); | |
| Serial.println("Done!"); | |
| while(digitalRead(CLEAR) != HIGH); // Wait until user release the RESET button. | |
| Serial.println("Restarting..."); | |
| ESP.restart(); | |
| } | |
| role_value = EEPROM.read(ROLE_FLAG_ADDRESS); | |
| if(role_value == 0){ | |
| // Enter server mode | |
| Serial.println("Server mode."); | |
| // Insert webpage server here... | |
| // ... | |
| // ... | |
| WiFi.mode(WIFI_AP); | |
| WiFi.softAP("Xirka NodeMCU", "abcdefghijkl"); | |
| server.on("/submit", submitHandler); | |
| server.begin(); | |
| // Update role flag in eeprom | |
| EEPROM.write(ROLE_FLAG_ADDRESS, 1); | |
| EEPROM.commit(); | |
| } | |
| else{ | |
| // Enter client mode | |
| Serial.println("Client mode."); | |
| // Insert connecting to SSID here... | |
| // ... | |
| // ... | |
| } | |
| } | |
| void loop() { | |
| // put your main code here, to run repeatedly: | |
| if(role_value == 0){ | |
| server.handleClient(); | |
| } | |
| } | |
| void submitHandler(){ | |
| SSID = server.arg("ssid"); | |
| password = server.arg("pass"); | |
| Serial.println(SSID); | |
| Serial.println(password); | |
| } | |
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