I'm encountering a very weird problem. I'm getting the following error when trying to compile the BME280 sensor web app on an ESP8266 (NodeMCU 12-E). The weird thing is, this exact code has previously worked for me, little more than a week ago. I went back to it today, pulled up my saved H file and every time I run the code I receive the error.
c:/users/me/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/3.0.4-gcc10.3-1757bed/bin/../lib/gcc/xtensa-lx106-elf/10.3.0/../../../../xtensa-lx106-elf/bin/ld.exe: cannot find SDA D2).ino.map: No such file or directory
collect2.exe: error: ld returned 1 exit status
exit status 1
Compilation error: exit status 1
I've tried googling and am unable to find a single result referencing the same error. I've deleted the ESP8266 folder in my documents and reinstalled the ESP8266 package via the manager. I've reinstalled the BME280 library. I've restarted my PC in case there was some weird tmp issue.
Before anyone asks for a picture detailing hardware connections, this is a compilation error, this happens before the upload and therefore hardware setup is irrelevant. As I said before, this has previously worked, so I know it's correct.
The code is below, NOTE that in addition to this exact code working last week, if I replace all instances of BME with BMP, and link my BMP280 sensor instead, all works fine. (This information may help with pinpointing an issue). It also works fine on my Arduino Mega, and to reiterate, worked on this same ESP8266 last week without changing any code. So perhaps the file it's referencing is genuinely just accidentally deleted...how can I get it back?
#include <ESP8266WebServer.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme;
float temperature, humidity, pressure, altitude;
const char* ssid = "myWiFi_yesIveConfiguredThis";
const char* password = "mypassword_yesIveConfiguredThis";
ESP8266WebServer server(80);
void setup() {
Serial.begin(115200);
delay(100);
bme.begin(0x76);
Serial.println("Connecting to ");
Serial.println(ssid);
//Connect to your local wi-fi network
WiFi.begin(ssid, password);
//check wi-fi is connected to wi-fi network
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected..!");
Serial.print("Got IP: ");
Serial.println(WiFi.localIP());
server.on("/", handle_OnConnect);
server.onNotFound(handle_NotFound);
server.begin();
Serial.println("HTTP server started");
}
void loop() {
server.handleClient();
}
void handle_OnConnect() {
temperature = bme.readTemperature();
humidity = bme.readHumidity();
pressure = bme.readPressure() / 100.0F;
altitude = bme.readAltitude(SEALEVELPRESSURE_HPA);
server.send(200, "text/html", SendHTML(temperature, humidity, pressure, altitude));
}
void handle_NotFound() {
server.send(404, "text/plain", "Not found");
}
String SendHTML(float temperature, float humidity, float pressure, float altitude) {
String ptr = "<!DOCTYPE html>";
ptr += "<html>";
ptr += "<head>";
ptr += "<title>ESP8266 Weather Station</title>";
ptr += "<meta name='viewport' content='width=device-width, initial-scale=1.0'>";
ptr += "<link href='https://fonts.googleapis.com/css?family=Open+Sans:300,400,600' rel='stylesheet'>";
ptr += "<style>";
ptr += "html { font-family: 'Open Sans', sans-serif; display: block; margin: 0px auto; text-align: center;color: #444444;}";
ptr += "body{margin: 0px;} ";
ptr += "h1 {margin: 50px auto 30px;} ";
ptr += ".side-by-side{display: table-cell;vertical-align: middle;position: relative;}";
ptr += ".text{font-weight: 600;font-size: 19px;width: 200px;}";
ptr += ".reading{font-weight: 300;font-size: 50px;padding-right: 25px;}";
ptr += ".temperature .reading{color: #F29C1F;}";
ptr += ".humidity .reading{color: #3B97D3;}";
ptr += ".pressure .reading{color: #26B99A;}";
ptr += ".altitude .reading{color: #955BA5;}";
ptr += ".superscript{font-size: 17px;font-weight: 600;position: absolute;top: 10px;}";
ptr += ".data{padding: 10px;}";
ptr += ".container{display: table;margin: 0 auto;}";
ptr += ".icon{width:65px}";
ptr += "</style>";
ptr += "</head>";
ptr += "<body>";
ptr += "<h1>ESP8266 Weather Station</h1>";
ptr += "<h3>www.how2electronics.com</h3>";
ptr += "<div class='container'>";
ptr += "<div class='data temperature'>";
ptr += "<div class='side-by-side icon'>";
ptr += "<svg enable-background='new 0 0 19.438 54.003'height=54.003px id=Layer_1 version=1.1 viewBox='0 0 19.438 54.003'width=19.438px x=0px xml:space=preserve xmlns=http://www.w3.org/2000/svg xmlns:xlink=http://www.w3.org/1999/xlink y=0px><g><path d='M11.976,8.82v-2h4.084V6.063C16.06,2.715,13.345,0,9.996,0H9.313C5.965,0,3.252,2.715,3.252,6.063v30.982";
ptr += "C1.261,38.825,0,41.403,0,44.286c0,5.367,4.351,9.718,9.719,9.718c5.368,0,9.719-4.351,9.719-9.718";
ptr += "c0-2.943-1.312-5.574-3.378-7.355V18.436h-3.914v-2h3.914v-2.808h-4.084v-2h4.084V8.82H11.976z M15.302,44.833";
ptr += "c0,3.083-2.5,5.583-5.583,5.583s-5.583-2.5-5.583-5.583c0-2.279,1.368-4.236,3.326-5.104V24.257C7.462,23.01,8.472,22,9.719,22";
ptr += "s2.257,1.01,2.257,2.257V39.73C13.934,40.597,15.302,42.554,15.302,44.833z'fill=#F29C21 /></g></svg>";
ptr += "</div>";
ptr += "<div class='side-by-side text'>Temperature</div>";
ptr += "<div class='side-by-side reading'>";
ptr += (int)temperature;
ptr += "<span class='superscript'>°C</span></div>";
ptr += "</div>";
ptr += "<div class='data humidity'>";
ptr += "<div class='side-by-side icon'>";
ptr += "<svg enable-background='new 0 0 29.235 40.64'height=40.64px id=Layer_1 version=1.1 viewBox='0 0 29.235 40.64'width=29.235px x=0px xml:space=preserve xmlns=http://www.w3.org/2000/svg xmlns:xlink=http://www.w3.org/1999/xlink y=0px><path d='M14.618,0C14.618,0,0,17.95,0,26.022C0,34.096,6.544,40.64,14.618,40.64s14.617-6.544,14.617-14.617";
ptr += "C29.235,17.95,14.618,0,14.618,0z M13.667,37.135c-5.604,0-10.162-4.56-10.162-10.162c0-0.787,0.638-1.426,1.426-1.426";
ptr += "c0.787,0,1.425,0.639,1.425,1.426c0,4.031,3.28,7.312,7.311,7.312c0.787,0,1.425,0.638,1.425,1.425";
ptr += "C15.093,36.497,14.455,37.135,13.667,37.135z'fill=#3C97D3 /></svg>";
ptr += "</div>";
ptr += "<div class='side-by-side text'>Humidity</div>";
ptr += "<div class='side-by-side reading'>";
ptr += (int)humidity;
ptr += "<span class='superscript'>%</span></div>";
ptr += "</div>";
ptr += "<div class='data pressure'>";
ptr += "<div class='side-by-side icon'>";
ptr += "<svg enable-background='new 0 0 40.542 40.541'height=40.541px id=Layer_1 version=1.1 viewBox='0 0 40.542 40.541'width=40.542px x=0px xml:space=preserve xmlns=http://www.w3.org/2000/svg xmlns:xlink=http://www.w3.org/1999/xlink y=0px><g><path d='M34.313,20.271c0-0.552,0.447-1,1-1h5.178c-0.236-4.841-2.163-9.228-5.214-12.593l-3.425,3.424";
ptr += "c-0.195,0.195-0.451,0.293-0.707,0.293s-0.512-0.098-0.707-0.293c-0.391-0.391-0.391-1.023,0-1.414l3.425-3.424";
ptr += "c-3.375-3.059-7.776-4.987-12.634-5.215c0.015,0.067,0.041,0.13,0.041,0.202v4.687c0,0.552-0.447,1-1,1s-1-0.448-1-1V0.25";
ptr += "c0-0.071,0.026-0.134,0.041-0.202C14.39,0.279,9.936,2.256,6.544,5.385l3.576,3.577c0.391,0.391,0.391,1.024,0,1.414";
ptr += "c-0.195,0.195-0.451,0.293-0.707,0.293s-0.512-0.098-0.707-0.293L5.142,6.812c-2.98,3.348-4.858,7.682-5.092,12.459h4.804";
ptr += "c0.552,0,1,0.448,1,1s-0.448,1-1,1H0.05c0.525,10.728,9.362,19.271,20.22,19.271c10.857,0,19.696-8.543,20.22-19.271h-5.178";
ptr += "C34.76,21.271,34.313,20.823,34.313,20.271z M23.084,22.037c-0.559,1.561-2.274,2.372-3.833,1.814";
ptr += "c-1.561-0.557-2.373-2.272-1.815-3.833c0.372-1.041,1.263-1.737,2.277-1.928L25.2,7.202L22.497,19.05";
ptr += "C23.196,19.843,23.464,20.973,23.084,22.037z'fill=#26B999 /></g></svg>";
ptr += "</div>";
ptr += "<div class='side-by-side text'>Pressure</div>";
ptr += "<div class='side-by-side reading'>";
ptr += (int)pressure;
ptr += "<span class='superscript'>hPa</span></div>";
ptr += "</div>";
ptr += "<div class='data altitude'>";
ptr += "<div class='side-by-side icon'>";
ptr += "<svg enable-background='new 0 0 58.422 40.639'height=40.639px id=Layer_1 version=1.1 viewBox='0 0 58.422 40.639'width=58.422px x=0px xml:space=preserve xmlns=http://www.w3.org/2000/svg xmlns:xlink=http://www.w3.org/1999/xlink y=0px><g><path d='M58.203,37.754l0.007-0.004L42.09,9.935l-0.001,0.001c-0.356-0.543-0.969-0.902-1.667-0.902";
ptr += "c-0.655,0-1.231,0.32-1.595,0.808l-0.011-0.007l-0.039,0.067c-0.021,0.03-0.035,0.063-0.054,0.094L22.78,37.692l0.008,0.004";
ptr += "c-0.149,0.28-0.242,0.594-0.242,0.934c0,1.102,0.894,1.995,1.994,1.995v0.015h31.888c1.101,0,1.994-0.893,1.994-1.994";
ptr += "C58.422,38.323,58.339,38.024,58.203,37.754z'fill=#955BA5 /><path d='M19.704,38.674l-0.013-0.004l13.544-23.522L25.13,1.156l-0.002,0.001C24.671,0.459,23.885,0,22.985,0";
ptr += "c-0.84,0-1.582,0.41-2.051,1.038l-0.016-0.01L20.87,1.114c-0.025,0.039-0.046,0.082-0.068,0.124L0.299,36.851l0.013,0.004";
ptr += "C0.117,37.215,0,37.62,0,38.059c0,1.412,1.147,2.565,2.565,2.565v0.015h16.989c-0.091-0.256-0.149-0.526-0.149-0.813";
ptr += "C19.405,39.407,19.518,39.019,19.704,38.674z'fill=#955BA5 /></g></svg>";
ptr += "</div>";
ptr += "<div class='side-by-side text'>Altitude</div>";
ptr += "<div class='side-by-side reading'>";
ptr += (int)altitude;
ptr += "<span class='superscript'>m</span></div>";
ptr += "</div>";
ptr += "</div>";
ptr += "</body>";
ptr += "</html>";
return ptr;
}