rafaelmaeuer

pinMode(12, INPUT_PULLUP); // Set pin 12 as an input w/ pull-up
while (digitalRead(12) == HIGH) // While pin 12 is HIGH (not activated)
    yield(); // Do (almost) nothing -- yield to allow ESP8266 background functions
Serial.println("Button is pressed!"); // Print button pressed message.

rafaelmaeuer

// id/name, placeholder/prompt, default, length
WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
wifiManager.addParameter(&custom_mqtt_server);

mqtt_server = custom_mqtt_server.getValue();

rafaelmaeuer

http.begin("http://192.168.0.104:8080/webappfordemo/Version");
 
int httpCode = http.GET();
if(httpCode == HTTP_CODE_OK)
{
   Serial.print("HTTP response code ");
   Serial.println(httpCode);
   String response = http.getString();
   Serial.println(response);
}

rafaelmaeuer

String card = "2-3d-fg-d6-12-68-32-3f-35-45-42-53-2a-3";
char *prefix = "GET /insert.php?card=";
char *postfix ="&error=1 HTTP/1.1\r\nHost: testsite.com\r\n\r\n"; 

String url = prefix +card+ postfix;
const char *url_complete = url.c_str();
//...

rafaelmaeuer

What´s the difference between ESP.reset() and ESP.restart()?

esp8266/Arduino#1722

Both work, but sometimes the ESP does not start again.

Answer:

rafaelmaeuer

reset causes:
  0: 
  1: normal boot
  2: reset pin
  3: software reset
  4: watchdog reset

boot device:
  0:
  1: ram

rafaelmaeuer

#include <EEPROM.h>

char wifi_ssid_private[32];
char wifi_password_private[32];
char clientName[10] = "newClient";
char ipAddr[16] = "172.024.001.001";//Pi Access Point IP-Adr.

//startAdr: offset (bytes), writeString: String to be written to EEPROM
void writeEEPROM(int startAdr, int laenge, char* writeString) {
  EEPROM.begin(512); //Max bytes of eeprom to use

rafaelmaeuer

extern struct MyStruct theVar;

rafaelmaeuer

//The usual arduino workaround/hack is to have all functions that requires custom datatstructures to be placed in an additional .h file. Just create a new tab in the IDE and give it a name.h then #include "name.h"

RGB getBlue(); //return RGB color = { 0 , 0 , 255 };

void displayRGB(RGB color); //could call an analogWrite on all member variables

rafaelmaeuer

y = map(x, 1, 50, 50, 1);