just some reformatting - no code changes

src/main.cpp

@@ -1,21 +1,22 @@
 // Example posting to display:
-// curl -XPOST --data-binary @- -H 'Content-Type:text/plain' http://esp32oled.local/oled
+// curl -XPOST --data-binary @- -H 'Content-Type:text/plain'
+// http://esp32oled.local/oled
 
 // I connected SCK to D22 and SDA to D21
 
-#include <Arduino.h>
-#include <Adafruit_I2CDevice.h> 
-#include <Wire.h>
 #include <Adafruit_GFX.h>
+#include <Adafruit_I2CDevice.h>
 #include <Adafruit_SSD1306.h>
+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <ESPmDNS.h>
+#include <PubSubClient.h>
+#include <Update.h>
+#include <WebServer.h>
 #include <WiFi.h>
 #include <WiFiClient.h>
-#include <WebServer.h>
-#include <ESPmDNS.h>
-#include <Update.h>
+#include <Wire.h>
 #include <uri/UriBraces.h>
-#include <PubSubClient.h>
-#include <ArduinoJson.h>
 
 const char* mqtt_server = "mqtt.ddns.kawomi.com";
 
@@ -67,8 +68,8 @@ const char* loginIndex =
     "<td><input type='submit' onclick='check(this.form)' value='Login'></td>"
     "</tr>"
     "</table>"
-"</form>"
-"<script>"
+    "</form>"
+    "<script>"
     "function check(form)"
     "{"
     "if(form.userid.value=='admin' && form.pwd.value=='admin')"
@@ -80,15 +81,18 @@ const char* loginIndex =
     " alert('Error Password or Username')/*displays error message*/"
     "}"
     "}"
-"</script>";
+    "</script>";
 
 /*
  * Server Index Page
  */
 
 const char* serverIndex =
-"<script src='https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js'></script>"
-"<form method='POST' action='#' enctype='multipart/form-data' id='upload_form'>"
+    "<script "
+    "src='https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js'></"
+    "script>"
+    "<form method='POST' action='#' enctype='multipart/form-data' "
+    "id='upload_form'>"
     "<input type='file' name='update'>"
     "<input type='submit' value='Update'>"
     "</form>"
@@ -123,7 +127,6 @@ const char* serverIndex =
     "});"
     "</script>";
 
-
 void reconnect() {
   // Loop until we're reconnected
   while (!client.connected()) {
@@ -150,7 +153,7 @@ void callback(char* topic, byte* payload, unsigned int length) {
   Serial.print("Message arrived [");
   Serial.print(topic);
 
-  String recBuf="";
+  String recBuf = "";
   Serial.print("] ");
   for (int i = 0; i < length; i++) {
     recBuf += (char)payload[i];
@@ -158,9 +161,9 @@ void callback(char* topic, byte* payload, unsigned int length) {
   Serial.println(recBuf);
 
   StaticJsonDocument<1024> jsonDoc;
-  deserializeJson(jsonDoc,recBuf);
-  const char* theText=jsonDoc["text"];
-  int theSize=jsonDoc["size"];
+  deserializeJson(jsonDoc, recBuf);
+  const char* theText = jsonDoc["text"];
+  int theSize = jsonDoc["size"];
 
   display.setCursor(40, 0);
   display.setTextSize(9);
@@ -175,8 +178,7 @@ void callback(char* topic, byte* payload, unsigned int length) {
   display.display();
 }
 
-
-void writeToOled(String text){
+void writeToOled(String text) {
   display.clearDisplay();
   display.setTextColor(WHITE);
   display.setCursor(0, 0);
@@ -193,9 +195,10 @@ void setup(void) {
   delay(2000);
 
   Serial.println("STARTUP");
-  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
+  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {  // Address 0x3D for 128x64
     Serial.println(F("SSD1306 allocation failed"));
-    for(;;);
+    for (;;)
+      ;
   }
   delay(2000);
 
@@ -212,12 +215,12 @@ void setup(void) {
     delay(500);
     Serial.print(".");
     if (wifiConnAttements++ > 120) {
-      Serial.println("<Wifi not connecting after 120 attmepts (1 min.)  - rebooting>");
+      Serial.println(
+          "<Wifi not connecting after 120 attmepts (1 min.)  - rebooting>");
       ESP.restart();
     }
   }
 
-
   Serial.println("");
   Serial.print("Connected to ");
   Serial.println(ssid);
@@ -225,7 +228,7 @@ void setup(void) {
   Serial.println(WiFi.localIP());
 
   /*use mdns for host name resolution*/
-  if (!MDNS.begin(host)) { //http://esp32ota.local
+  if (!MDNS.begin(host)) {  // http://esp32ota.local
     Serial.println("Error setting up MDNS responder!");
     while (1) {
       delay(1000);
@@ -254,25 +257,32 @@ void setup(void) {
     server.send(200, "text/html", text);
   });
   /*handling uploading firmware file */
-  server.on("/update", HTTP_POST, []() {
+  server.on(
+      "/update", HTTP_POST,
+      []() {
         server.sendHeader("Connection", "close");
         server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");
         ESP.restart();
-  }, []() {
+      },
+      []() {
         HTTPUpload& upload = server.upload();
         if (upload.status == UPLOAD_FILE_START) {
           Serial.printf("Update: %s\n", upload.filename.c_str());
-      if (!Update.begin(UPDATE_SIZE_UNKNOWN)) { //start with max available size
+          if (!Update.begin(
+                  UPDATE_SIZE_UNKNOWN)) {  // start with max available size
             Update.printError(Serial);
           }
         } else if (upload.status == UPLOAD_FILE_WRITE) {
           /* flashing firmware to ESP*/
-      if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {
+          if (Update.write(upload.buf, upload.currentSize) !=
+              upload.currentSize) {
             Update.printError(Serial);
           }
         } else if (upload.status == UPLOAD_FILE_END) {
-      if (Update.end(true)) { //true to set the size to the current progress
-        Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);
+          if (Update.end(
+                  true)) {  // true to set the size to the current progress
+            Serial.printf("Update Success: %u\nRebooting...\n",
+                          upload.totalSize);
           } else {
             Update.printError(Serial);
           }
@@ -284,7 +294,6 @@ void setup(void) {
   client.setCallback(callback);
 
   writeToOled("Ready.");
-
 }
 
 void loop(void) {
@@ -295,5 +304,4 @@ void loop(void) {
     reconnect();
   }
   client.loop();
-
 }