Dokumentation um Webinterface, Einstellungen und OTA-Update erweitert

CHANGELOG.md

@@ -1,5 +1,33 @@
 CHANGELOG
 
+## 0.0.7 (28.08.2026)
++ Webinterface über eigenen WLAN-Access-Point ergänzt
++ Persistente Konfiguration für WLAN-Name, WLAN-Passwort und Callsign
++ Lizenzinformationen für Projektcode und Drittanbieterbibliotheken ergänzt
++ Firmware-Upload über das Webinterface für beide Firmwarevarianten ergänzt
+
+### Segeflug Modul
++ Einstellbare minimale und maximale Schleppgeschwindigkeit
++ Einstellbare maximale Übertragungszeit, Standardwert 90 Sekunden
++ Geladene Einstellungen beim Programmstart verwendet
++ Sensorinitialisierung und Messwertverarbeitung robustifiziert
+
+### Winden Modul
++ Einstellbare WLAN-Konfiguration über das Webinterface
++ Standard-WLAN-Name `Winde-Telemetry`
++ Initialisierung von Servo und LED-Ring korrigiert
++ NMEA-Nachrichtenprüfung und Fehlerbehandlung beim Empfang verbessert
+
+## 0.0.6 (18.01.2025)
++ Anpassung Programmablaufplan
+
+### Segeflug Modul
++ Umsetzen der Sender-Logik
++ senden im NMEA Format
+
+### Winden Modul
++ empfangen im NMEA Format
+
 ## 0.0.5 (30.11.2025)
 + Formatierung Code
 ### Segeflug Modul

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Winden-Telemetry contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,28 +1,131 @@
 [![build status](https://gitea.rabe11.de/FCS/Winden-Telemetry/actions/workflows/build_release.yaml/badge.svg?event=push)](https://gitea.rabe11.de/FCS/Winden-Telemetry/releases)
+![Gitea Release](https://img.shields.io/gitea/v/release/FCS/Winden-Telemetry?gitea_url=https%3A%2F%2Fgitea.rabe11.de)
+
 
 # Winden-Telemetry
 
+Der eigene Projektcode steht unter der MIT-Lizenz. Die verwendeten
+Drittanbieterbibliotheken bleiben unter ihren jeweiligen Original-Lizenzen.
+Eine Übersicht der Komponenten, Versionen und Lizenzbedingungen steht in
+[THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md); der vollständige Lizenztext
+für den Projektcode steht in [LICENSE](LICENSE).
+
 
 Übertragung der IAS des Segelflugzeuges an die Winde 
 
-Hardware:
+### Hardware:
 - [Heltec LoRa 32 (V3)](https://heltec.org/project/wifi-lora-32-v3/)
 - SG90 Servo
 - MS4525 differenz Drucksensor
-- 12 LED Ring WS2812b
+- 12 LED Ring WS2812b 50mm
 - BMP180 Temperatur und Luftdrucksensor
 - DC-DC Step Down Wandler 3A MP1584
 - Relais
 
-Features:
+### Features:
 - [x] LORA zum Übertragen
 - [x] Airspeed via differenz Drucksensor
-- [ ] Webinterface
+- [x] Webinterface über eigenen Access Point
-- [ ] min/max speed einstellbar
+- [x] min/max speed per Webinterface einstellbar
-- [ ] Kennzeichen einstellbar
+- [x] Kennzeichen per Webinterface einstellbar
+- [x] maximale Übertragungszeit per Webinterface einstellbar (Standard: 90 Sekunden)
+- [x] Firmware-Upload per Webinterface für beide Firmwarevarianten
 - [x] Analoge Anzeige in der Winde
 - [x] Farbige LEDs für Limits
-- [ ] Übertragungszeit Begrenzen
+- [x] Übertragungszeit Begrenzen
-- [ ] Übertragungszeit einstellbar
 - [ ] Übertragung Rundumleuchten Signal an Start
 - [x] Luftdrucksensor für Höhe und Vario
+
+### Webinterface und Firmware-Update
+
+Beide Firmwarevarianten starten einen eigenen WLAN-Access-Point. Der
+voreingestellte WLAN-Name ist bei Sailplane `Sailplane-D1234` und bei der
+Winde `Winde-Telemetry`.
+
+- Passwort: `telemetry`
+- Webadresse: `http://192.168.4.1/`
+
+Im Webinterface können WLAN-Name und WLAN-Passwort sowie Callsign, minimale und maximale Geschwindigkeit
+gespeichert werden. Die Werte bleiben nach einem Neustart erhalten. Die
+Sailplane-Firmware lädt sie beim Start und verwendet sie für die Telemetrie,
+die Schlepp-Erkennung und die maximale Übertragungszeit. Die Winden-Firmware verwendet die gespeicherten
+Grenzen für die Anzeige beim Start; empfangene Telemetriegrenzen werden danach
+weiterhin aus dem LoRa-Paket übernommen.
+
+Für ein Firmware-Update die zur jeweiligen Hardware passende `.bin`-Datei aus
+`.pio/build/<environment>/` auswählen. Nach erfolgreichem Upload startet das
+Gerät automatisch neu.
+
+## Aufbau
+
+Pin Layout Heltec WiFi LoRa (v3)
+
+![Heltec WiFi LoRa (v3)](https://heltec.org/wp-content/uploads/2023/09/pin.png)
+
+
+### Anschlusszuordnung
+| Heltec WiFi LoRa (v3) Pin | MP1584 |SG90 Pin | BMP180 Pin |  MS4525 Pin | LED Ring Pin |
+| --- | --- | --- | --- | --- | --- |
+| GND  | OUT -| GND | GND | GND | GND |
+ | 3.3 V| | | VCC | VCC | VCC |
+| GPIO 6| | |  | | IN |
+| GPIO 7| | 1 PWM (Orange)| | |
+| GPIO19| | | SDA| SDA |
+| GPIO20| | | SCL| SCL|
+| 5V | OUT + | VCC | | |
+
+
+
+## PCB
+Die Platine ist so gestaltet das sie individuell bestückt werden kann, je nach Verwendung
+
+![Platine bestückt](img/Winden_Telemetry_PCB.png)
+
+![Platinen Vorderseite](img/Winden_Telemetry_PCB_front.png)![Platinen Rückseite](img/Winden_Telemetry_PCB_back.png)
+
+[Schaltplan](img/Winden_Telemetry_Schematic.pdf)
+
+| Bauteil | Modul Segelflugzeug | Modul Winde | Modul SKP |
+| ---	|---	|---	|---	|
+| J1 | x | x | x | optional|
+| A1 | x | x | x | optional|	
+| I2C_1 | MS4525 | optional| optional|	
+| I2C_2 | BMP180 | optional| optional|
+| I2C_3 | optional| optional| optional|
+| I2C_4 | optional| optional| optional|
+| GPIO3 | optional| optional| optional|
+| GPIO4 | optional| optional| optional|
+| GPIO5 | optional| Eingang Warnleuchte |optional|
+| GPIO6 | optional| LED Ring | optional|
+| GPIO7 | optional| Servo | für Relais|
+
+
+
+## Programmablauf Segelflugzeug
+
+```mermaid
+flowchart TD
+    A(["Start"])
+    A --> B{"ist Senden an?"}
+    B --> | Ja  | C{"Sende Timer <90 sec"}
+    I --> | Nein | E{"is airborn?"} 
+   
+    C --> | Nein | F["Sende Schleppen komplett"] -->G["is airborn=true"] -->L["Lowspeedtimer = 0"]  
+    C --> | Ja | D["Sende Speed"]
+   
+    
+    D --> Z["Warte 1 Sekunde"]
+    L ----> H["Senden aus"] -->Z
+    
+    Z --> B
+    
+    B --> | nein | I{"Speed < 30 km/h"} 
+    E --> | nein |J["Senden an"] -->P["Start Sendetimer"] --> D
+    I --> | ja| K["Lowspeedtimer + 1"]
+    K --> M{"lowspeedtimer >90"} 
+    M --> | ja | N["is airborn=false"] --> Z
+    M --> | nein | Z
+    E --> | ja |O["Lowspeedtimer = 0"] --> Z
+
+    
+```

THIRD_PARTY_NOTICES.md

@@ -0,0 +1,44 @@
+# Third-party notices
+
+This project contains or links to the following third-party software. The
+listed versions are the versions resolved by PlatformIO on 2026-08-28.
+Original license texts and copyright notices must be retained when the
+corresponding software is redistributed.
+
+## Direct and transitive library dependencies
+
+| Component | Version | Used by | License | Source |
+| --- | --- | --- | --- | --- |
+| U8g2 | 2.36.18 | Sailplane, Winde | BSD-2-Clause; bundled fonts may have additional licenses | https://github.com/olikraus/u8g2 |
+| RadioLib | 7.6.0 | Sailplane, Winde | MIT | https://github.com/jgromes/RadioLib |
+| ArduinoJson | 7.4.3 | Sailplane, Winde | MIT | https://github.com/bblanchon/ArduinoJson |
+| Bolder Flight Systems Airdata Calculations | 4.0.0 | Sailplane | MIT | https://github.com/bolderflight/airdata_calculations |
+| Bolder Flight Systems MS4525 | 1.1.3 | Sailplane | MIT | https://github.com/bolderflight/ms4525 |
+| Bolder Flight Systems Unit Conversions | 5.0.0 | Sailplane | MIT | https://github.com/bolderflight/units |
+| Adafruit BMP085 Library | 1.2.4 | Sailplane | BSD | https://github.com/adafruit/Adafruit-BMP085-Library |
+| Adafruit BusIO | 1.17.4 | Sailplane, transitive | MIT | https://github.com/adafruit/Adafruit_BusIO |
+| Adafruit Unified Sensor | 1.1.15 | Sailplane, transitive | Apache-2.0 | https://github.com/adafruit/Adafruit_Sensor |
+| Adafruit NeoPixel | 1.15.4 | Winde | LGPL-3.0-or-later | https://github.com/adafruit/Adafruit_NeoPixel |
+| ESP32Servo | 3.1.3 | Winde | LGPL-2.1-or-later | https://github.com/madhephaestos/ESP32Servo |
+
+## Build framework
+
+| Component | Version | License | Source |
+| --- | --- | --- | --- |
+| Arduino core for ESP32 | 3.20017.241212+sha.dcc1105b | LGPL-2.1-or-later | https://github.com/espressif/arduino-esp32 |
+
+The PlatformIO platform and build tools are development dependencies. Their
+licenses are distributed with their respective PlatformIO packages and are
+not relicensed by this project.
+
+## License compatibility
+
+The source code in this repository is licensed under the MIT License in
+`LICENSE`. MIT is compatible with the MIT, BSD, Apache-2.0 and LGPL components
+listed above. The LGPL components remain under their original licenses; this
+project does not change or relicense them.
+
+For a release containing compiled firmware, distribute this file together
+with `LICENSE` and retain the copyright and license notices supplied by the
+third-party components. U8g2 fonts must be checked separately when changing
+fonts, because their licensing terms can differ from the U8g2 library code.

components/Tacho/README.md

@@ -0,0 +1,10 @@
+# Tacho mit LED Ring
+
+Das Grundmodell ist von [alvaroalea auf Thingiverse](https://www.thingiverse.com/thing:2489322)
+
+
+Erweitert wurde:
+- Ziffernblatt 0 - 220 km/h
+- Rückplatte mit Auslass für die Kabel des LED Rings [hier](back_with_hole.stl)
+- Platte mit Vertiefung für LED Ring [hier](bezel_LED_Tacho.stl)
+

extra_script.py

@@ -6,3 +6,9 @@ build_tag = env['PIOENV']
 version_tag = os.getenv("FIRMWARE_VERSION")
 
 env.Replace(PROGNAME="firmware_%s_%s" % (build_tag, version_tag))
+
+# include toolchain paths
+env.Replace(COMPILATIONDB_INCLUDE_TOOLCHAIN=True)
+
+# override compilation DB path
+env.Replace(COMPILATIONDB_PATH=os.path.join("$BUILD_DIR", "compile_commands.json"))

lib/sailplane/airspeed.cpp

@@ -11,12 +11,19 @@ bfs::Ms4525do pres;
 Adafruit_BMP085 bmp;
 
 float pressure_avg[10];
-float basicaltitude;
+float basicaltitude = 0.0f;
-void init_2ndi2c(){
+bool pressure_sensor_ready = false;
-  Wire1.begin(dp_sda, dp_scl);
+
+bool init_2ndi2c(){
+  if (!Wire1.begin(dp_sda, dp_scl))
+  {
+    Serial.println("Error starting I2C");
+    return false;
+  }
   Wire1.setClock(400000);
+  return true;
 }
-void init_airspeed_sensor(void)
+bool init_airspeed_sensor(void)
 {
 
   /*
@@ -27,10 +34,9 @@ void init_airspeed_sensor(void)
   if (!pres.Begin())
   {
     Serial.println("Error communicating with sensor");
-    while (1)
+    return false;
-    {
-    }
   }
+  return true;
 }
 
 int get_airspeed_kmh(void)
@@ -51,10 +57,22 @@ float get_airspeed(void)
     return 0;
   }
 }
-void init_pressure_sensor(void)
+bool init_pressure_sensor(void)
 { 
-  bmp.begin(BMP085_ULTRAHIGHRES, &Wire1);
+  if (!bmp.begin(BMP085_ULTRAHIGHRES, &Wire1))
+  {
+    Serial.println("Error communicating with pressure sensor");
+    return false;
+  }
   basicaltitude=bmp.readPressure();
+  if (basicaltitude <= 0.0f)
+  {
+    Serial.println("Invalid initial pressure");
+    return false;
+  }
+  for (float &sample : pressure_avg)
+    sample = basicaltitude;
+  pressure_sensor_ready = true;
   Serial.print("Pressure = ");
   Serial.print(basicaltitude);
   Serial.println(" Pa");
@@ -64,21 +82,28 @@ void init_pressure_sensor(void)
   Serial.print("Altitude = ");
   Serial.print(get_altitude(basicaltitude));
   Serial.println(" meters");
+  return true;
 }
 
 float get_pressure()
 {
+  if (!pressure_sensor_ready)
+    return 0.0f;
+
   float pressure;
   pressure = bmp.readPressure();
-  memcpy(pressure_avg, &pressure_avg[1], sizeof(pressure_avg) - sizeof(int));
+  if (pressure <= 0.0f)
+    return pressure_avg[9];
+
+  memmove(pressure_avg, &pressure_avg[1], sizeof(pressure_avg) - sizeof(pressure_avg[0]));
   pressure_avg[9] = pressure;
   return pressure;
 }
 
 float get_pressure_avg(void)
 {
+  float total = 0.0f;
   int i;
-  float total;
   for (i = 0; i <10; i++)
   {
     total = total + pressure_avg[i];
@@ -97,14 +122,14 @@ float get_vario_avg(void)
   float vario;
 
   int i;
-  float total;
+  float total = 0.0f;
   for (i = 0; i <9; i++)
   {
     int n=i+1;
     vario = get_altitude(pressure_avg[n]) - get_altitude(pressure_avg[i]);
     total = total + vario;
   }
-  return (total / 10);
+  return (total / 9);
 }
 
 float get_altitude(float pressure)
@@ -115,5 +140,5 @@ float get_altitude(float pressure)
 }
 
 float get_altitude_diff(void){
-  return bmp.readPressure() - basicaltitude;
+  return get_altitude(pressure_avg[9]) - get_altitude(basicaltitude);
 }

lib/sailplane/airspeed.h

@@ -1,8 +1,8 @@
 #ifndef WINDENTELEMETRY_AIRSPEED_H
 #define WINDENTELEMETRY_AIRSPEED_H
 
-void init_2ndi2c(void);
+bool init_2ndi2c(void);
-void init_airspeed_sensor(void);
+bool init_airspeed_sensor(void);
 
 int get_airspeed_kmh(void);
 /*!
@@ -10,7 +10,7 @@ int get_airspeed_kmh(void);
 */
 float get_airspeed(void);
 
-void init_pressure_sensor(void);
+bool init_pressure_sensor(void);
 float get_pressure(void);
 float get_pressure_adv(void);
 float get_altitude(float pressure);

lib/webinterface/webinterface.cpp

@@ -0,0 +1,242 @@
+#include "webinterface.h"
+#include <Arduino.h>
+#include <Preferences.h>
+#include <Update.h>
+#include <WebServer.h>
+#include <WiFi.h>
+
+namespace
+{
+constexpr char default_access_point_password[] = "telemetry";
+constexpr char settings_namespace[] = "telemetry";
+constexpr char default_callsign[] = "D1234";
+constexpr int default_min_speed = 80;
+constexpr int default_max_speed = 150;
+constexpr unsigned int default_active_time_seconds = 90;
+
+String default_access_point_name()
+{
+#ifdef DEVICE_SAILPLANE
+  return String("Sailplane-") + default_callsign;
+#else
+  return "Winde-Telemetry";
+#endif
+}
+
+WebServer server(80);
+Preferences preferences;
+TelemetrySettings *active_settings = nullptr;
+bool restart_after_update = false;
+bool update_failed = false;
+bool access_point_restart_pending = false;
+
+String html_escape(const String &value)
+{
+  String escaped = value;
+  escaped.replace("&", "&amp;");
+  escaped.replace("<", "&lt;");
+  escaped.replace(">", "&gt;");
+  escaped.replace("\"", "&quot;");
+  escaped.replace("'", "&#39;");
+  return escaped;
+}
+
+void send_page(const String &message = String())
+{
+  String page;
+  page.reserve(2600);
+  page += F("<!doctype html><html lang='de'><head><meta charset='utf-8'>"
+            "<meta name='viewport' content='width=device-width,initial-scale=1'>"
+            "<title>Winden-Telemetry</title><style>"
+            "body{font-family:sans-serif;max-width:38rem;margin:2rem auto;padding:0 1rem}"
+            "label{display:block;margin-top:1rem}input{box-sizing:border-box;width:100%;padding:.6rem;font-size:1rem}"
+            "button{margin-top:1rem;padding:.65rem 1rem;font-size:1rem}"
+            ".msg{padding:.6rem;background:#e5f4e8}small{color:#555}"
+            "</style></head><body><h1>Winden-Telemetry</h1>");
+  if (message.length() > 0)
+  {
+    page += F("<p class='msg'>");
+    page += html_escape(message);
+    page += F("</p>");
+  }
+  page += F("<form method='post' action='/settings'>"
+            "<label>WLAN-Name<input name='ap_name' maxlength='32' required value='");
+  page += html_escape(active_settings->access_point_name);
+  page += F("'></label><label>WLAN-Passwort<input name='ap_password' type='password' minlength='8' maxlength='63' required value='");
+  page += html_escape(active_settings->access_point_password);
+  page += F("'></label><label>Callsign<input name='callsign' maxlength='16' required value='");
+  page += html_escape(active_settings->callsign);
+  page += F("'></label><label>Min Speed (km/h)<input name='min' type='number' min='0' max='300' required value='");
+  page += String(active_settings->min_speed);
+  page += F("'></label><label>Max Speed (km/h)<input name='max' type='number' min='1' max='300' required value='");
+  page += String(active_settings->max_speed);
+  page += F("'></label><label>Uebertragungszeit (Sekunden)<input name='active_time' type='number' min='1' max='600' required value='");
+  page += String(active_settings->active_time_seconds);
+  page += F("'></label><button type='submit'>Speichern</button></form>"
+            "<h2>Firmware aktualisieren</h2><form method='post' action='/update' enctype='multipart/form-data'>"
+            "<input name='firmware' type='file' accept='.bin' required><button type='submit'>Upload starten</button>"
+            "</form><p><small>Access Point: ");
+  page += html_escape(active_settings->access_point_name);
+  page += F("</small></p></body></html>");
+  server.send(200, "text/html; charset=utf-8", page);
+}
+
+bool parse_settings(TelemetrySettings &settings)
+{
+  String callsign = server.arg("callsign");
+  String access_point_name = server.arg("ap_name");
+  String access_point_password = server.arg("ap_password");
+  int min_speed = server.arg("min").toInt();
+  int max_speed = server.arg("max").toInt();
+  int active_time_seconds = server.arg("active_time").toInt();
+  callsign.trim();
+  access_point_name.trim();
+  access_point_password.trim();
+  if (access_point_name.length() == 0 || access_point_name.length() > 32 || access_point_password.length() < 8 || access_point_password.length() > 63 || callsign.length() == 0 || callsign.length() > 16 || min_speed < 0 || max_speed > 300 ||
+      min_speed >= max_speed || active_time_seconds < 1 || active_time_seconds > 600)
+    return false;
+
+  settings.callsign = callsign;
+  settings.access_point_name = access_point_name;
+  settings.access_point_password = access_point_password;
+  settings.min_speed = min_speed;
+  settings.max_speed = max_speed;
+  settings.active_time_seconds = active_time_seconds;
+  return true;
+}
+
+void handle_root()
+{
+  send_page();
+}
+
+void handle_settings()
+{
+  TelemetrySettings updated = *active_settings;
+  if (!parse_settings(updated))
+  {
+    server.send(400, "text/plain; charset=utf-8", "Ungueltige Einstellungen");
+    return;
+  }
+
+  active_settings->callsign = updated.callsign;
+  active_settings->access_point_name = updated.access_point_name;
+  active_settings->access_point_password = updated.access_point_password;
+  active_settings->min_speed = updated.min_speed;
+  active_settings->max_speed = updated.max_speed;
+  active_settings->active_time_seconds = updated.active_time_seconds;
+  preferences.putString("callsign", active_settings->callsign);
+  preferences.putString("ap_name", active_settings->access_point_name);
+  preferences.putString("ap_password", active_settings->access_point_password);
+  preferences.putInt("min", active_settings->min_speed);
+  preferences.putInt("max", active_settings->max_speed);
+  preferences.putUInt("active_time", active_settings->active_time_seconds);
+  send_page("Einstellungen gespeichert.");
+  access_point_restart_pending = true;
+}
+
+void handle_update_upload()
+{
+  HTTPUpload &upload = server.upload();
+  if (upload.status == UPLOAD_FILE_START)
+  {
+    restart_after_update = false;
+    update_failed = false;
+    Serial.printf("Firmware-Upload: %s\n", upload.filename.c_str());
+    if (!Update.begin(UPDATE_SIZE_UNKNOWN))
+    {
+      update_failed = true;
+      Update.printError(Serial);
+    }
+  }
+  else if (upload.status == UPLOAD_FILE_WRITE)
+  {
+    if (Update.write(upload.buf, upload.currentSize) != upload.currentSize)
+    {
+      update_failed = true;
+      Update.printError(Serial);
+    }
+  }
+  else if (upload.status == UPLOAD_FILE_END)
+  {
+    if (Update.end(true))
+    {
+      restart_after_update = true;
+      Serial.printf("Firmware-Upload abgeschlossen: %u Bytes\n", upload.totalSize);
+    }
+    else
+    {
+      update_failed = true;
+      Update.printError(Serial);
+    }
+  }
+}
+
+void handle_update_result()
+{
+  if (!update_failed && restart_after_update)
+  {
+    server.send(200, "text/plain; charset=utf-8", "Upload erfolgreich. Neustart...");
+    if (restart_after_update)
+    {
+      delay(500);
+      ESP.restart();
+    }
+  }
+  else
+    server.send(500, "text/plain; charset=utf-8", "Firmware-Upload fehlgeschlagen");
+}
+} // namespace
+
+bool webinterface_begin(TelemetrySettings &settings)
+{
+  active_settings = &settings;
+  preferences.begin(settings_namespace, false);
+  settings.callsign = preferences.getString("callsign", default_callsign);
+  settings.access_point_name = preferences.getString("ap_name", default_access_point_name());
+  settings.access_point_password = preferences.getString("ap_password", default_access_point_password);
+  settings.min_speed = preferences.getInt("min", default_min_speed);
+  settings.max_speed = preferences.getInt("max", default_max_speed);
+    settings.active_time_seconds = preferences.getUInt("active_time", default_active_time_seconds);
+  if (settings.access_point_name.length() == 0 || settings.access_point_name.length() > 32 || settings.access_point_password.length() < 8 || settings.access_point_password.length() > 63 || settings.callsign.length() == 0 || settings.min_speed < 0 || settings.min_speed >= settings.max_speed ||
+      settings.max_speed > 300 || settings.active_time_seconds < 1 || settings.active_time_seconds > 600)
+  {
+    settings.callsign = default_callsign;
+    settings.access_point_name = default_access_point_name();
+    settings.access_point_password = default_access_point_password;
+    settings.min_speed = default_min_speed;
+    settings.max_speed = default_max_speed;
+    settings.active_time_seconds = default_active_time_seconds;
+  }
+
+  WiFi.mode(WIFI_AP);
+  bool ap_started = WiFi.softAP(settings.access_point_name, settings.access_point_password);
+  if (!ap_started)
+    return false;
+
+  server.on("/", HTTP_GET, handle_root);
+  server.on("/settings", HTTP_POST, handle_settings);
+  server.on("/update", HTTP_POST, handle_update_result, handle_update_upload);
+  server.begin();
+  Serial.print("Webinterface: http://");
+  Serial.println(WiFi.softAPIP());
+  return true;
+}
+
+void webinterface_handle(void)
+{
+  server.handleClient();
+  if (access_point_restart_pending)
+  {
+    access_point_restart_pending = false;
+    WiFi.softAPdisconnect(true);
+    delay(100);
+    if (!WiFi.softAP(active_settings->access_point_name, active_settings->access_point_password))
+      Serial.println("Access Point konnte nicht neu gestartet werden");
+  }
+}
+
+const TelemetrySettings &webinterface_settings(void)
+{
+  return *active_settings;
+}

lib/webinterface/webinterface.h

@@ -0,0 +1,20 @@
+#ifndef WINDENTELEMETRY_WEBINTERFACE_H
+#define WINDENTELEMETRY_WEBINTERFACE_H
+
+#include <Arduino.h>
+
+struct TelemetrySettings
+{
+  String callsign;
+  String access_point_name;
+  String access_point_password;
+  int min_speed;
+  int max_speed;
+  unsigned int active_time_seconds;
+};
+
+bool webinterface_begin(TelemetrySettings &settings);
+void webinterface_handle(void);
+const TelemetrySettings &webinterface_settings(void);
+
+#endif

lib/winde/tacho.cpp

@@ -8,14 +8,13 @@ void init_servo(void)
 {
   myservo.setPeriodHertz(50);
   myservo.attach(servoPin);
-  set_tacho(0, 70, 150);
 }
 
 void set_tacho(int speed, int speed_min, int speed_max)
 {
   int val = map(speed, -25, 220, 0, 155);
 #ifdef DEBUG
-  Serial.print("Tacho Mapping: ")
+  Serial.print("Tacho Mapping: ");
   Serial.println(val);
 #endif
   myservo.write(val);
@@ -72,11 +71,5 @@ void init_pixel(void)
 
 int setoffsetpixel(int pixel)
 {
-  int newpixel;
+  return (pixel + pixeloffset + NUMPIXELS) % NUMPIXELS;
-  newpixel = pixel + pixeloffset;
-  if (newpixel >= NUMPIXELS)
-  {
-    newpixel = newpixel - NUMPIXELS;
-  }
-  return newpixel;
 }

lib/windentelemetry.h

@@ -2,6 +2,12 @@
 #define WINDENTELEMETRY_CONFIG_H
 
 #define LORA_FREQ 868.0
+#define TELEMETRY_CALLSIGN "D1234"
+#define TELEMETRY_SEND_INTERVAL_MS 1000UL
+#define TELEMETRY_ACTIVE_TIME_MS 90000UL
+#define TELEMETRY_LOW_SPEED_KMH 30
+#define default_min_tow_speed 80
+#define default_max_tow_speed 150
 #ifdef HELTEC_WIFI_LORA_32_V3
 // SX1262 on HELTEC_WIFI_LORA_32_V3 has the following connections:
 // NSS pin:   8
@@ -27,8 +33,6 @@
 /**difference pressure**/
 #define dp_scl 20
 #define dp_sda 19
-#define default_min_tow_speed 80
-#define default_max_tow_speed 150
 #endif
 
 #ifdef DEVICE_WINDE

platformio.ini

@@ -9,8 +9,8 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-build_cache_dir=./.pio/.build_cache
+build_cache_dir = ~/.pio/.build_cache
-cache_dir=./.pio/.cache_dir
+cache_dir = ~/.pio/.cache_dir
 
 [common]
 platform = espressif32
@@ -25,37 +25,41 @@ build_flags =
 	-D CORE_DEBUG_LEVEL=5
 	-D SLOW_CLK_TPYE=0
 	-D REGION_EU868
+	-Ilib
+	-Isrc
 lib_deps = 
 	olikraus/U8g2@^2.36.15
 	jgromes/RadioLib@^7.4.0
+	bblanchon/ArduinoJson@^7.4.2
 monitor_speed = 115200
 extra_scripts = pre:extra_script.py
 
 [env:heltec_wifi_lora_32_V3_sailplane]
 extends = common
 board = heltec_wifi_lora_32_V3
-lib_deps = ${common.lib_deps}
+lib_deps = 
+	${common.lib_deps}
 	bolderflight/Bolder Flight Systems MS4525@^1.1.3
 	bolderflight/Bolder Flight Systems Unit Conversions@^5.0.0
 	bolderflight/Bolder Flight Systems Airdata Calculations@^4.0.0
 	adafruit/Adafruit BMP085 Library @ ^1.2.4
-lib_ignore =
+lib_ignore = winde
-	winde
+build_flags = 
-
+	${common.build_flags}
-
-build_flags = ${common.build_flags}
 	-D DEVICE_SAILPLANE
-
+upload_port = COM8
+monitor_port = COM8
 
 [env:heltec_wifi_lora_32_V3_winde]
 extends = common
 board = heltec_wifi_lora_32_V3
-lib_deps = ${common.lib_deps}
+lib_deps = 
+	${common.lib_deps}
 	adafruit/Adafruit NeoPixel@^1.15.2
 	madhephaestus/ESP32Servo@^3.0.9
-
+lib_ignore = sailplane
-lib_ignore =
+build_flags = 
-	sailplane
+	${common.build_flags}
-build_flags = ${common.build_flags}
 	-D DEVICE_WINDE
-
+upload_port = COM9
+monitor_port = COM9

src/main.cpp

@@ -2,24 +2,28 @@
 #include <Arduino.h>
 #include <U8g2lib.h>
 #include <RadioLib.h>
-
+#include <ArduinoJson.h>
+#include <webinterface.h>
 #ifdef DEVICE_WINDE
 #include <tacho.h>
 #endif
 
+TelemetrySettings telemetry_settings;
+
 #ifdef DEVICE_SAILPLANE
 #include <airspeed.h>
+unsigned long previousMillisSend = 0;
+unsigned long previousMillissendtimer = 0;
+bool send_data = false;
+bool is_airborn = false;
+unsigned long lowspeedtimer = 0;
+bool sensors_ready = false;
 #endif
 
 SX1262 radio = new Module(LORA_NSS, LORA_DIO1, LORA_NRST, LORA_BUSY);
-
+bool radio_ready = false;
 #ifdef DEVICE_WINDE
 volatile bool receivedFlag = false;
-
-// this function is called when a complete packet
-// is received by the module
-// IMPORTANT: this function MUST be 'void' type
-//            and MUST NOT have any arguments!
 #if defined(ESP8266) || defined(ESP32)
 ICACHE_RAM_ATTR
 #endif
@@ -34,43 +38,57 @@ void setFlag(void)
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, OLED_RST, OLED_CLK, OLED_DATA);
 #endif
 
+#ifdef DEVICE_WINDE
+
+String data_from;
+int data_speed = 0;
+int data_min = 0;
+int data_max = 0;
+
+#endif
+
 void setup()
 {
   /* Serial to display data */
   Serial.begin(115200);
   Serial.println("start");
+  if (!webinterface_begin(telemetry_settings))
+    Serial.println("Webinterface konnte nicht gestartet werden");
   int state = radio.begin(LORA_FREQ);
   if (state == RADIOLIB_ERR_NONE)
   {
+    radio_ready = true;
     Serial.println(F("success!"));
   }
   else
   {
     Serial.print(F("failed, code "));
     Serial.println(state);
-    while (true)
+    Serial.println(F("Webinterface bleibt verfuegbar"));
-    {
-      delay(10);
-    }
   }
   u8g2.begin();
   u8g2.clearBuffer();
   u8g2.setFont(u8g2_font_ncenB14_tr);
 #ifdef DEVICE_SAILPLANE
   u8g2.drawStr(0, 20, "Start Plane");
-  init_2ndi2c();
+  sensors_ready = init_2ndi2c() && init_airspeed_sensor() && init_pressure_sensor();
-  init_airspeed_sensor();
+  if (!sensors_ready)
-  init_pressure_sensor();
+  {
+    u8g2.drawStr(0, 40, "Sensor error");
+  }
 #endif
 #ifdef DEVICE_WINDE
   u8g2.drawStr(0, 20, "Start Winde");
-  init_servo();
   init_pixel();
+  init_servo();
+  set_tacho(0, telemetry_settings.min_speed, telemetry_settings.max_speed);
 
   radio.setPacketReceivedAction(setFlag);
 
   // start listening for LoRa packets
 
+  if (radio_ready)
+  {
     state = radio.startReceive();
     if (state == RADIOLIB_ERR_NONE)
     {
@@ -80,30 +98,65 @@ void setup()
     {
       Serial.print(F("failed, code "));
       Serial.println(state);
-    while (true)
+      radio_ready = false;
-    {
-      delay(10);
     }
   }
 #endif
   u8g2.sendBuffer();
 }
 
-void loop()
+String nmea_checksum(String str)
 {
-#ifdef DEVICE_SAILPLANE
+  byte cs = 0;
-
+  for (unsigned int n = 1; n < str.length(); n++)
-  /* Read the sensor */
-  get_pressure();
-  int vel_kmh = get_airspeed_kmh();
-  u8g2.clearBuffer();
-  u8g2.setFont(u8g2_font_logisoso42_tr);
-  u8g2.setCursor(0, 60);
-  u8g2.print(vel_kmh);
-  u8g2.sendBuffer();
-  if (vel_kmh > 30)
   {
-    String data = String(vel_kmh);
+    if (str[n] == '*')
+      break;
+    cs ^= str[n];
+  }
+
+  if (cs < 0x10)
+    return "*0" + String(cs, HEX);
+  else
+    return "*" + String(cs, HEX);
+}
+void draw_rssi(int Rssi){
+    u8g2.drawFrame(102,8,4,3);
+    u8g2.drawFrame(107,6,4,5);
+    u8g2.drawFrame(112,4,4,7);
+    u8g2.drawFrame(117,2,4,9);
+    u8g2.drawFrame(122,0,4,11);
+
+    if ((Rssi > -120) && Rssi < 0 )
+      {
+       u8g2.drawBox(102,8,4,3); 
+      }
+
+    if ((Rssi > -100) && Rssi < 0 )
+      {
+       u8g2.drawBox(107,6,4,5); 
+      }
+    if ((Rssi > -85) && Rssi < 0 )
+      {
+       u8g2.drawBox(112,4,4,7); 
+      }
+    if ((Rssi > -70) && Rssi < 0 )
+      {
+       u8g2.drawBox(117,2,4,9); 
+      }
+    if ((Rssi > -55) && Rssi < 0 )
+      {
+       u8g2.drawBox(122,0,4,11); 
+     }
+
+  
+}
+
+void send_lora(String data)
+{
+  if (!radio_ready)
+    return;
+
   int state = radio.transmit(data);
   if (state == RADIOLIB_ERR_NONE)
   {
@@ -112,7 +165,7 @@ void loop()
 
     // print measured data rate
     Serial.print(F("[SX1262] Datarate:\t"));
-      Serial.print(radio.getDataRate());
+    //Serial.print(radio.getDataRate());
     Serial.println(F(" bps"));
   }
   else if (state == RADIOLIB_ERR_PACKET_TOO_LONG)
@@ -131,6 +184,163 @@ void loop()
     Serial.print(F("failed, code "));
     Serial.println(state);
   }
+}
+
+void send_speed(int vel_kmh)
+{
+  String data;
+  // serializeJson(sailplane_data, data);
+  // sprintf(data,"$PWTLS,%s,%u,%u,%u","D-1234",vel_kmh,70,140);
+  data = "$PWTLS," + telemetry_settings.callsign + "," + String(vel_kmh) + "," + String(telemetry_settings.min_speed) + "," + String(telemetry_settings.max_speed);
+  data += nmea_checksum(data);
+  Serial.println(data);
+  send_lora(data);
+}
+
+void send_airborn()
+{
+  String data;
+  // serializeJson(sailplane_data, data);
+  data = "$PWTLA," + telemetry_settings.callsign + ",1";
+  data += nmea_checksum(data);
+  Serial.println(data);
+  send_lora(data);
+}
+String getSplitValue(String data, char separator, int index)
+{
+  int found = 0;
+  int strIndex[] = {0, -1};
+  int maxIndex = data.length() - 1;
+  for (int i = 0; i <= maxIndex && found <= index; i++)
+  {
+    if (data.charAt(i) == separator || i == maxIndex)
+    {
+      found++;
+      strIndex[0] = strIndex[1] + 1;
+      strIndex[1] = (i == maxIndex) ? i + 1 : i;
+    }
+  }
+  return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
+}
+#ifdef DEVICE_WINDE
+
+void decode_start(String data)
+{
+  data_from = getSplitValue(data, ',', 1);
+  data_speed = (getSplitValue(data, ',', 2)).toInt();
+  data_min = (getSplitValue(data, ',', 3)).toInt();
+  data_max = (getSplitValue(data, ',', 4)).toInt();
+}
+void decode_airborn(String data)
+{
+  data_from = getSplitValue(data, ',', 1);
+  data_speed = 0;
+  data_min = 0;
+  data_max = 0;
+}
+
+bool valid_nmea(String data)
+{
+  int checksum_start = data.indexOf('*');
+  if (checksum_start <= 1 || checksum_start + 2 >= data.length())
+    return false;
+
+  byte checksum = 0;
+  for (int i = 1; i < checksum_start; ++i)
+    checksum ^= data[i];
+
+  String received_checksum = data.substring(checksum_start + 1, checksum_start + 3);
+  received_checksum.toUpperCase();
+  char expected_checksum[3];
+  snprintf(expected_checksum, sizeof(expected_checksum), "%02X", checksum);
+  return received_checksum == expected_checksum;
+}
+
+bool decode_msg(String data)
+{
+  String pos1 = getSplitValue(data, ',', 0);
+  if (pos1 == "$PWTLS")
+  {
+    if (getSplitValue(data, ',', 4).length() == 0)
+      return false;
+    decode_start(data);
+    return true;
+  }
+  else if (pos1 == "$PWTLA")
+  {
+    decode_airborn(data);
+    return true;
+  }
+  else
+  {
+    Serial.println("Nachricht nicht erkannt");
+    return false;
+  }
+}
+#endif
+void loop()
+{
+  webinterface_handle();
+#ifdef DEVICE_SAILPLANE
+  if (!sensors_ready)
+  {
+    delay(1000);
+    return;
+  }
+
+  unsigned long currentMillis = millis();
+  unsigned long active_time_ms = telemetry_settings.active_time_seconds * 1000UL;
+  if (currentMillis - previousMillisSend >= TELEMETRY_SEND_INTERVAL_MS)
+  {
+    previousMillisSend = currentMillis;
+    /* Read the sensor */
+    get_pressure();
+    int vel_kmh = get_airspeed_kmh();
+    u8g2.clearBuffer();
+    u8g2.setFont(u8g2_font_logisoso42_tr);
+    u8g2.setCursor(0, 60);
+    u8g2.print(vel_kmh);
+    u8g2.sendBuffer();
+
+    if (send_data == false)
+    {
+      if (vel_kmh < telemetry_settings.min_speed)
+      {
+        lowspeedtimer += TELEMETRY_SEND_INTERVAL_MS;
+        if (lowspeedtimer >= active_time_ms)
+        {
+          is_airborn = false;
+          lowspeedtimer = active_time_ms;
+        }
+      }
+      else
+      {
+        if (is_airborn)
+        {
+          lowspeedtimer = 0;
+        }
+        else
+        {
+          send_data = true;
+          send_speed(vel_kmh);
+          previousMillissendtimer = currentMillis;
+        }
+      }
+    }
+    else
+    {
+      if (currentMillis - previousMillissendtimer < active_time_ms)
+      {
+        send_speed(vel_kmh);
+      }
+      else
+      {
+        send_airborn();
+        is_airborn = true;
+        lowspeedtimer = 0;
+        send_data = false;
+      }
+    }
 
 #ifdef DEBUG
     /* Display the data */
@@ -138,18 +348,17 @@ void loop()
     Serial.println(vel_kmh);
     Serial.print(pres.pres_pa(), 6);
     Serial.print("IAS (m/s): ");
-    Serial.println(ias);
+    Serial.println(get_airspeed());
     Serial.println(vel_kmh);
     Serial.print("\t");
     Serial.print(pres.die_temp_c(), 6);
     Serial.print("\n");
 #endif
-    delay(1000);
   }
 
 #endif
 #ifdef DEVICE_WINDE
-  if (receivedFlag)
+  if (radio_ready && receivedFlag)
   {
     // reset flag
     receivedFlag = false;
@@ -158,24 +367,29 @@ void loop()
     String str;
     int state = radio.readData(str);
 
-    // you can also read received data as byte array
-    /*
-      byte byteArr[8];
-      int numBytes = radio.getPacketLength();
-      int state = radio.readData(byteArr, numBytes);
-    */
-
     if (state == RADIOLIB_ERR_NONE)
     {
+      if (!valid_nmea(str) || !decode_msg(str))
+      {
+        Serial.println("Ungueltige Telemetrie-Nachricht");
+        return;
+      }
       // packet was successfully received
       u8g2.clearBuffer();
-      u8g2.setFont(u8g2_font_logisoso42_tr);
+      u8g2.setFont(u8g2_font_ncenB10_tr);
-      u8g2.setCursor(0, 60);
+      u8g2.setCursor(0, 10);
-      u8g2.print(str);
+      u8g2.print(data_from);
+      u8g2.setCursor(0, 64);
+      u8g2.print(data_min);
+      u8g2.setCursor(64, 64);
+      u8g2.print(data_max);
+      u8g2.setFont(u8g2_font_logisoso32_tr);
+      u8g2.setCursor(0, 50);
+      u8g2.print(data_speed);
+      draw_rssi(radio.getRSSI());
       u8g2.sendBuffer();
       Serial.println(str);
-      int speed = str.toInt();
+      set_tacho(data_speed, data_min, data_max);
-      set_tacho(speed, 70, 150);
     }
   }
 #endif