404 (Not Found) on ESP8266 Webserver

[StWiemann]

I just upgraded the code of my ESP8266 to get rid of Blynk. OTA worked after disabling the fire-wall, I was able to flash the device (multiple times). Also I got to the point where I could connect to the MCU via access point mode and I entered my WiFi credentials. Now the MCU starts but when I browse to the IP of the Machine, I only get 404 (Not Found). It seems like the webserver didn't start correctly. I am able however to navigate to http:///temperatures and get the temperatures.

I did not yet try to flash it over USB, because I didn't want to open the machine.

Is there any experience with this kind of behaviour?

I do have the Silvia E, only PID with a DS18B20 as sensor. My config looks like this:

/**
 * @file    userConfig_sample.h
 * @brief   Values must be configured by the user
 * @version 3.0.1 Alpha
 *
 */
#ifndef _userConfig_H
#define _userConfig_H

// firmware version (must match with definitions in the main source file)
#define USR_FW_VERSION    3
#define USR_FW_SUBVERSION 0
#define USR_FW_HOTFIX     2
#define USR_FW_BRANCH     "MASTER"

// List of supported machines
enum MACHINE {
    RancilioSilvia,   // MACHINEID 0
    RancilioSilviaE,  // MACHINEID 1
    Gaggia,           // MACHINEID 2
    QuickMill         // MACHINEID 3
};

/**
 * Preconfiguration
 */

// Machine
#define MACHINEID 1                // see above list of supported machines

// Display
#define OLED_DISPLAY 2             // 0 = deactivated, 1 = SH1106 (e.g. 1.3 "128x64), 2 = SSD1306 (e.g. 0.96" 128x64)
#define OLED_I2C 0x3C              // I2C address for OLED, 0x3C by default
#define DISPLAYTEMPLATE 1          // 1 = Standard display template, 2 = Minimal template, 3 = only temperature, 4 = scale template, 20 = vertical display (see git Handbook for further information)
#define DISPLAYROTATE U8G2_R0      // rotate display clockwise: U8G2_R0 = no rotation; U8G2_R1 = 90°; U8G2_R2 = 180°; U8G2_R3 = 270°
#define SHOTTIMER 1                // 0 = deactivated, 1 = activated 2 = with scale
#define HEATINGLOGO 1              // 0 = deactivated, 1 = Rancilio, 2 = Gaggia
#define OFFLINEGLOGO 1             // 0 = deactivated, 1 = activated
#define BREWSWITCHDELAY 3000       // time in ms that the brew switch will be delayed (shot timer will show that much longer after switching off)
#define VERBOSE 0                  // 1 = Show verbose output (serial connection), 0 = show less

// Connectivity
#define CONNECTMODE 1              // 0 = offline 1 = WIFI-MODE 2 = AP-MODE (not working in the moment)
#define HOSTNAME "Rancilio"
#define PASS "Rancilio"        // default password for WiFiManager
#define MAXWIFIRECONNECTS 5        // maximum number of reconnection attempts, use -1 to deactivate
#define WIFICONNECTIONDELAY 10000  // delay between reconnects in ms

// PID & Hardware
#define ONLYPID 1                  // 1 = Only PID, 0 = PID and preinfusion
#define ONLYPIDSCALE 0             // 0 = off , 1 = OnlyPID with Scale
#define BREWMODE 1                 // 1 = NORMAL preinfusion ; 2 = Scale with weight
#define BREWDETECTION 1            // 0 = off, 1 = Software (Onlypid 1), 2 = Hardware (Onlypid 0), 3 = Sensor/Hardware for Only PID
#define BREWSWITCHTYPE 1           // 1 = normal Switch, 2 = Trigger Switch
#define TRIGGERTYPE HIGH           // LOW = low trigger, HIGH = high trigger relay
#define VOLTAGESENSORTYPE HIGH     // BREWDETECTION 3 configuration
#define PINMODEVOLTAGESENSOR INPUT // Mode INPUT_PULLUP, INPUT or INPUT_PULLDOWN_16 (Only Pin 16)
#define PRESSURESENSOR 0           // 1 = pressure sensor connected to A0; PINBREWSWITCH must be set to the connected input!
#define TEMPLED 1                  // set led pin high when brew or steam set point is within range

// TOF sensor for water level
#define TOF 0                      // 0 = no TOF sensor connected; 1 = water level by TOF sensor
#define TOF_I2C 0x29               // I2C address of TOF sensor; 0x29 by default
#define CALIBRATION_MODE 0         // 1 = enable to obtain water level calibration values; 0 = disable for normal PID operation; can also be done in Blynk
#define WATER_FULL 102             // value for full water tank (=100%) obtained in calibration procedure (in mm); can also be set in Blynk
#define WATER_EMPTY 205            // value for empty water tank (=0%) obtained in calibration procedure (in mm); can also be set in Blynk

// E-Trigger
#define ETRIGGER 0                 // 0 = no trigger (for Rancilio except Rancilio E), 1 = trigger for CPU of Rancilio E
#define ETRIGGERTIME 600           // seconds, time between trigger signal
#define TRIGGERRELAYTYPE HIGH      // LOW = low trigger, HIGH = high trigger relay for E-Trigger

// Brew Scale
#define SCALE_SAMPLES 2                     // Load cell sample rate
#define SCALE_CALIBRATION_FACTOR 3195.83    // Raw data is divided by this value to convert to readable data

/* Pressure sensor
 *
 * measure and verify "offset" value, should be 10% of ADC bit reading @supply volate (3.3V)
 * same goes for "fullScale", should be 90%
 */
#define OFFSET      102            // 10% of ADC input @3.3V supply = 102
#define FULLSCALE   922            // 90% of ADC input @3.3V supply = 922
#define MAXPRESSURE 200

// PlatformIO OTA
#define OTA true                   // true = OTA activated, false = OTA deactivated
#define OTAHOST "Rancilio"     // Name to be shown in ARUDINO IDE Port
#define OTAPASS <password>          // Password for OTA updtates

// MQTT
#define MQTT 0                             // 1 = MQTT enabled, 0 = MQTT disabled
#define MQTT_USERNAME "mymqttuser"
#define MQTT_PASSWORD "mymqttpass"
#define MQTT_TOPIC_PREFIX "custom/Küche."  // topic will be "<MQTT_TOPIC_PREFIX><HOSTNAME>/<READING>"
#define MQTT_SERVER_IP "XXX.XXX.XXX.XXX"   // IP-Address of locally installed mqtt server
#define MQTT_SERVER_PORT 1883

// BLYNK
#define BLYNK 0                                 // 0 = no Blynk , 1 = Blynk
#define AUTH "blynk_auth"
#define BLYNKADDRESS "blynk.clevercoffee.de"    // blynk-server IP-Address
#define BLYNKPORT 8080                          // blynk-server portver

// Grafana
#define GRAFANA 0                  // 2 = custom Grafana 1 = Grafana visualisation (access required), 0 = off (default)

// INFLUXDB
#define INFLUXDB 0                 // 1 = INFLUX enabled, 0 = INFLUX disabled
#define INFLUXDB_URL ""            // InfluxDB server address
#define INFLUXDB_AUTH_TYPE 1       // 1 = API Token , 2 = User/Pass
#define INFLUXDB_API_TOKEN ""
#define INFLUXDB_ORG_NAME ""
#define INFLUXDB_USER ""
#define INFLUXDB_PASSWORD ""
#define INFLUXDB_DB_NAME "coffee"  // InfluxDB bucket name
#define INFLUXDB_INTERVAL 5000     // Send interval in milliseconds

// PID Parameters (not yet in Web interface)
#define EMA_FACTOR 0.6             // Smoothing of input that is used for Tv (derivative component of PID). Smaller means less smoothing but also less delay, 0 means no filtering
#define BREWPID_DELAY 10           // delay until enabling PID controller during brew (no heating during this time)

// Backflush values
#define FILLTIME 3000              // time in ms the pump is running
#define FLUSHTIME 6000             // time in ms the 3-way valve is open -> backflush
#define MAXFLUSHCYCLES 5           // number of cycles the backflush should run, 0 = disabled

// Pin Layout
#define ONE_WIRE_BUS 2             // Temp sensor pin
#define PINPRESSURESENSOR 99       // Pressuresensor 0: A0 (ESP8266), >0 ONLY ESP32
#define PINVALVE 12                // Output pin for 3-way-valve
#define PINPUMP 13                 // Output pin for pump
#define PINHEATER 14               // Output pin for heater
#define PINVOLTAGESENSOR 15        // Input pin for voltage sensor
#define PINETRIGGER 16             // PIN for E-Trigger relay
#define PINBREWSWITCH 0            // 0: A0 (ESP8266) ; >0 : DIGITAL PIN, ESP32 OR ESP8266: ONLY USE PIN15 AND PIN16!
#define PINSTEAMSWITCH 17          // STEAM active
#define LEDPIN    18               // LED PIN ON near setpoint
#define OLED_SCL 5                 // Output pin for display clock pin
#define OLED_SDA 4                 // Output pin for display data pin
#define HXDATPIN 99                // weight scale PIN
#define HXCLKPIN 99                // weight scale PIN
#define SCREEN_WIDTH 128           // OLED display width, in pixels
#define SCREEN_HEIGHT 64           // OLED display height, in pixels

// Historic (no settings)
#define TEMPSENSOR 1               // 2 = TSIC306, 1 = DS18B20

// Check BrewSwitch
#if (defined(ESP8266) && ((PINBREWSWITCH != 15 && PINBREWSWITCH != 0 && PINBREWSWITCH != 16 )))
  #error("WRONG Brewswitch PIN for ESP8266, Only PIN 15 and PIN 16");
#endif

// defined compiler errors
#if (PRESSURESENSOR == 1) && (PINPRESSURESENSOR == 0) && (PINBREWSWITCH == 0)
  #error Change PINBREWSWITCH or PRESSURESENSOR!
#endif

#endif

Thank you!

[kjyv]

You'll need to also run the PlatformIO tasks "Upload Filesystem" and possibly also "Erase Flash" (but you can first try without it). "Not Found" relates to the template files not being found as they are uploaded to the flash with this task.

[StWiemann]

Thank you that helped to get the web-page. In addition to make it work I had to do this for anybody having the same problem: https://github.com/platformio/platform-espressif8266/issues/263#issuecomment-1081177511

Unfortunately the device does not save the set-temperature and PID-values now. Haven't figured that one out yet. But the inital Problem ist solved.

[kjyv]

We haven't seen this before I think, which OS is this on? Saving not being persistent is usually because "Erase Flash" was not used (only works via USB)

[StWiemann]

Win 11, VSC 1.71.2, PlatformIO Core 6.1.4 Home 3.4.3 I assumed that the switch to littlefs already did erase the flash, but I guess I'll have to give USB a try then, thank you!