{"id":180,"date":"2019-11-16T21:51:32","date_gmt":"2019-11-16T21:51:32","guid":{"rendered":"https:\/\/dieter.dimo4u.de\/?page_id=180"},"modified":"2022-05-19T10:39:16","modified_gmt":"2022-05-19T09:39:16","slug":"180-2","status":"publish","type":"page","link":"https:\/\/dieter.dimo4u.de\/?page_id=180","title":{"rendered":"Umbau Funksteckdose auf WLAN"},"content":{"rendered":"

Die vorhandenen Funksteckdosen (433Mhz) haben nicht an allen Standorten sicher funktioniert. Deshalb habe ich einen Umbau der Steckdosen auf WLAN vorgenommen. \"\"<\/a>Als WLAN-Modul wird der ESP8266-01 eingesetzt. Die urspr\u00fcngliche Stromversorgung erschien mir als die preiswerteste L\u00f6sung. MIt 33V an der Gleichrichterbr\u00fccke und einem Vorschaltkondensator von 220nF ergibt sich eine verf\u00fcgbare Leistung von 3W f\u00fcr WLAN-Modul und Relais. Problem war dabei, da\u00df das Relais ein 12V-Typ ist und bei 12V Rohspannung reicht die Leistung nicht f\u00fcr WLAN und gezogenes Relais.\u00a0 L\u00f6sung ist ein PWM-Betrieb des Relais. Zum Anzug wird das Tastverh\u00e4ltnis so geregelt, das 12V f\u00fcr 20ms anliegen und danach wird reduziert auf 6V. Damit ist gen\u00fcgend Energiereserve zum sicheren Betrieb des WLAN-Moduls vorhanden.
Leider konnte bei dieser Hardwarel\u00f6sung nicht die TASMOTA<\/a>-Software eingesetzt werden, weil die Befehlsabarbeitung der Scripte zu langsam war, um das Relais per PWM zu betreiben. Die Software ist in C++ geschrieben und stellt auch ein Firmware-Update \u00fcber das Webinterface zur Verf\u00fcgung.<\/p>\n\n

#include<\/span> <Arduino.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <ESP8266WiFi.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <ESP8266WebServer.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <ESP8266HTTPUpdateServer.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <ESP8266HTTPClient.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <ESP8266httpUpdate.h><\/span><\/span>\n<\/span><\/span>#include<\/span> <WiFiUdp.h><\/span><\/span>\n<\/span><\/span>\/\/#include <string.h><\/span>\n<\/span><\/span>#include<\/span> \"index_html.h\"<\/span>\t\t\/\/ In dieser Datei befindet sich die Steuerung Webseite<\/span><\/span>\n<\/span><\/span>\n<\/span><\/span>const<\/span> char<\/span>* ssid = \"ssid\"<\/span>;      \/\/ WLAN-Name,<\/span>\n<\/span><\/span>const<\/span> char<\/span>* password = \"password\"<\/span>; \/\/ WLAN-Passwort<\/span>\n<\/span><\/span>const<\/span> char<\/span>* WiFi_hostname = \"ESP-Rel-0000\"<\/span>;\n<\/span><\/span>\n<\/span><\/span>\/\/#define RelaisPin 0\t\t\t\/\/ GPIO 0\tModulpin 3<\/span>\n<\/span><\/span>\/* GPIO 0 kann f\u00fcr Relais nicht verwendet werden, weil beim Start Signal auf L geht --> Relais zieht zuviel Strom<\/span>\n<\/span><\/span>\tist eventuell f\u00fcr Signalisierung mit LED verwendbar (WLAN nicht verbunden oder WLAN-Verbindung ok.)<\/span>\n<\/span><\/span>*\/<\/span>\n<\/span><\/span>#define<\/span> LedPin 0\t\t\t\/\/ GPIO 0\tModulpin 3\t\/\/ LED<\/span><\/span>\n<\/span><\/span>#define<\/span> RelaisPin 3\t\t\t\/\/ GPIO 3\tModulpin 1\t\/\/ Relais<\/span><\/span>\n<\/span><\/span>#define<\/span> TXD\t1\t\t\t\/\/ GPIO 1\tModulpin 8\t\/\/ blaue LED<\/span><\/span>\n<\/span><\/span>#define<\/span> TasterPin 2\t\t\t\/\/ GPIO 2\tModulpin 5\t\/\/ Aktiv Low (Taster gegen GND)<\/span><\/span>\n<\/span><\/span>#define<\/span> RXD\t3\t\t\t\/\/ GPIO 3\tModulpin 1<\/span><\/span>\n<\/span><\/span>\/\/ Modulpin 2 = VCC<\/span>\n<\/span><\/span>\/\/ Modulpin 4 = \/Reset<\/span>\n<\/span><\/span>\/\/ Modulpin 6 = Enable (muss an VCC)<\/span>\n<\/span><\/span>\/\/ Modulpin 7 = GND<\/span>\n<\/span><\/span>\n<\/span><\/span>#define<\/span> USE_SERIAL Serial<\/span>\n<\/span><\/span>\n<\/span><\/span>#define<\/span> U_Z_Diode 33<\/span>\n<\/span><\/span>#define<\/span> U_Relais_min 7\t\t\t\/\/ bei 33V bekommt Relais 6,6V ab<\/span><\/span>\n<\/span><\/span>#define<\/span> prog_vt 1024 - round(1024 * U_Relais_min \/ U_Z_Diode)<\/span>\n<\/span><\/span>#define<\/span> U_Relais_nom 12\t\t\t\/\/ bei 33V bekommt Relais 12V ab<\/span><\/span>\n<\/span><\/span>#define<\/span> prog_vt1 1024 - round(1024 * U_Relais_nom \/ U_Z_Diode)<\/span>\n<\/span><\/span>\n<\/span><\/span>int<\/span> active_low = 1<\/span>;\t\t\t\/\/ \"0\" Relais schaltet bei +5V , \"1\" Relais beim schaltet bei 0V<\/span>\n<\/span><\/span>int<\/span> val = 0<\/span>; \t\t\t\t\/\/ Hier wird der Schaltzustand gespeichert<\/span>\n<\/span><\/span>\n<\/span><\/span>ESP8266WebServer server<\/span>(80<\/span>)<\/span><\/span>;\t\t\t\t\/\/ Serverport  hier einstellen<\/span>\n<\/span><\/span>ESP8266HTTPUpdateServer httpUpdater;\n<\/span><\/span>\n<\/span><\/span>void<\/span> set_relais<\/span>()<\/span><\/span>\n<\/span><\/span><\/span>{\n<\/span><\/span>\tif<\/span> ((active_low ^ val)==0<\/span>)\n<\/span><\/span>\t{\n<\/span><\/span>\tanalogWrite(RelaisPin,prog_vt1);\n<\/span><\/span>\tdelay(20<\/span>);\t\t\t\t\t\t\/\/ 20ms full power (12V)<\/span>\n<\/span><\/span>\tanalogWrite(RelaisPin,prog_vt);\t\t\t\t\/\/ relay is on, power reduce to U_Relais_min<\/span>\n<\/span><\/span>\t}\n<\/span><\/span>\telse<\/span>\n<\/span><\/span>\t{digitalWrite(RelaisPin, 1<\/span>);}\n<\/span><\/span>}\n<\/span><\/span>\n<\/span><\/span>char<\/span>* dbgprint<\/span> ( const<\/span> char<\/span>* format, ... )<\/span><\/span>\n<\/span><\/span><\/span>{<\/span>\n<\/span><\/span>\tstatic<\/span> char<\/span> sbuf[60<\/span>] ;\t\t\t\t\t\t\/\/ For debug lines<\/span><\/span>\n<\/span><\/span>\tva_list varArgs; \t\t\t\t\t        \/\/ For variable number of params<\/span><\/span>\n<\/span><\/span>\tva_start ( varArgs, format ) ;\t\t\t\t\t\/\/ Prepare parameters<\/span><\/span>\n<\/span><\/span>\tvsnprintf ( sbuf, sizeof<\/span>(sbuf), format, varArgs ) ;\t\t\/\/ Format the message<\/span><\/span>\n<\/span><\/span>\tva_end ( varArgs );\t\t\t\t                \/\/ End of using parameters<\/span><\/span>\n<\/span><\/span>\treturn<\/span> sbuf ;\t\t\t\t\t\t\t\/\/ Return stored string<\/span><\/span>\n<\/span><\/span>}<\/span>\n<\/span><\/span><\/span>\n<\/span><\/span>void<\/span> handleNotFound<\/span>()<\/span> <\/span>{ server.send(404<\/span>, \"text\/plain\"<\/span>, \"404: Not found\"<\/span>); } \t\/\/ Send HTTP status 404 (Not Found)<\/span><\/span>\n<\/span><\/span>void<\/span> Index<\/span>()<\/span> <\/span>{ server.send(200<\/span>, \"text\/html\"<\/span>, indexHTML); }           \t\t\t\t\t\/\/ Index-Webseite senden (sehe Datei \"index_html.h\")<\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>void<\/span> Command<\/span>()<\/span>    \/\/ Wird ausgef\u00fchrt wenn \"http:\/\/<ip address>\/cm\/\" aufgerufen wurde<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span>{<\/span><\/span><\/span>\n<\/span><\/span>  if<\/span> (server.args() > 0<\/span>) \/\/ wenn Argumente im GET Anfrage vorhanden sind z.B http:\/\/<ip address>\/?zustand=r<\/span><\/span><\/span><\/span>\n<\/span><\/span>  {<\/span><\/span><\/span>\n<\/span><\/span>    if<\/span> (server.arg(\"cmnd\"<\/span>) == \"power 0\"<\/span>) { val = 0<\/span>;    set_relais(); }<\/span><\/span><\/span>\n<\/span><\/span>    if<\/span> (server.arg(\"cmnd\"<\/span>) == \"power 1\"<\/span>) { val = 1<\/span>;    set_relais(); }<\/span><\/span><\/span>\n<\/span><\/span>    if<\/span> (server.arg(\"cmnd\"<\/span>) == \"power 2\"<\/span>) { val = !val; set_relais(); }<\/span><\/span><\/span>\n<\/span><\/span>    server.sendHeader(\"Cache-Control\"<\/span>, \"no-cache, no-store, must-revalidate\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>\/\/ wichtig! damit Daten nicht aus dem Browser-Cache kommen<\/span><\/span><\/span><\/span>\n<\/span><\/span>\t\tserver.sendHeader(\"pragma\"<\/span>,\"no-cache\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>\t\tserver.sendHeader(\"Expires\"<\/span>, \"-1\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>\t\tserver.sendHeader(\"Access-Control-Allow-Origin\"<\/span>,\"*\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>    server.send(200<\/span>, \"application\/json\"<\/span>, String(int<\/span>(val)) );\t\t\t\/\/ Antwort an Internet Browser senden nur eine Zahl (\"0\"\/\"1\")<\/span><\/span><\/span><\/span>\n<\/span><\/span>  }<\/span><\/span><\/span>\n<\/span><\/span>}<\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>void<\/span> HTTP_update<\/span>()<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span>{<\/span><\/span><\/span>\n<\/span><\/span>\tt_httpUpdate_return ret = ESPhttpUpdate.update(\"http:\/\/ds215j\/wlanSW\/updater.php\"<\/span>,\"WLAN_SD\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>\tswitch<\/span> (ret) {<\/span><\/span><\/span>\n<\/span><\/span>      case<\/span> HTTP_UPDATE_FAILED:<\/span><\/span><\/span>\n<\/span><\/span>        USE_SERIAL.printf<\/span>(\"HTTP_UPDATE_FAILD Error (%d): %s\"<\/span>, ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());<\/span><\/span><\/span>\n<\/span><\/span>        break<\/span>;<\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>      case<\/span> HTTP_UPDATE_NO_UPDATES:<\/span><\/span><\/span>\n<\/span><\/span>        USE_SERIAL.println(\"HTTP_UPDATE_NO_UPDATES\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>        break<\/span>;<\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>      case<\/span> HTTP_UPDATE_OK:<\/span><\/span><\/span>\n<\/span><\/span>        USE_SERIAL.println(\"HTTP_UPDATE_OK\"<\/span>);<\/span><\/span><\/span>\n<\/span><\/span>        break<\/span>;<\/span><\/span><\/span>\n<\/span><\/span>    }<\/span><\/span><\/span>\n<\/span><\/span>}<\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>void<\/span> setup<\/span>()<\/span> <\/span>{<\/span><\/span><\/span>\n<\/span><\/span>  pinMode(RelaisPin, OUTPUT);<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tpinMode(TasterPin, INPUT_PULLUP);<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tpinMode(LedPin, OUTPUT);<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdigitalWrite(RelaisPin, active_low);<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdigitalWrite(LedPin,val);\t\t\t\t\t\t\t\t\t\t\/\/ Led an<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  analogWriteFreq((uint32_t<\/span>)15000<\/span>);\t\t\t\t\t\t\/\/ PWM-Frequenz f\u00fcr Relais<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>\tWiFi_hostname = dbgprint(\"ESP-Rel-%04d\"<\/span>,ESP.getChipId() & 0x1fff<\/span>);       \/\/ %04d - short chip ID in dec, like in hostname<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>\tWiFi.hostname(WiFi_hostname);<\/span><\/span><\/span><\/span>\n<\/span><\/span>  WiFi.mode(WIFI_STA);<\/span><\/span><\/span><\/span>\n<\/span><\/span>  WiFi.begin(ssid, password);<\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>    while<\/span> (WiFi.status() != WL_CONNECTED)<\/span><\/span><\/span><\/span>\n<\/span><\/span>    {<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdelay(250<\/span>);val = !val;\t\t\t\t\t\t\/\/ LED blinkt 2 x pro Sekunde<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdigitalWrite(LedPin,val);\t\t\t\t\t\/\/ Led toggeln<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>    }<\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdelay(250<\/span>);val = 0<\/span>;<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tdigitalWrite(LedPin,active_low);\t\t\t\t\/\/ Led aus<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>\/\/  Behandlung der Ereignissen anschliessen<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  server.on(\"\/\"<\/span>, Index);<\/span><\/span><\/span><\/span>\n<\/span><\/span>\tserver.on(\"\/cm\"<\/span>, Command);<\/span><\/span><\/span><\/span>\n<\/span><\/span>  server.onNotFound ( handleNotFound );<\/span><\/span><\/span><\/span>\n<\/span><\/span>  httpUpdater.setup(&server);<\/span><\/span><\/span><\/span>\n<\/span><\/span>  server.begin();<\/span><\/span><\/span><\/span>\n<\/span><\/span>}<\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>void<\/span> loop<\/span>()<\/span> <\/span>{<\/span><\/span><\/span><\/span>\n<\/span><\/span>  server.handleClient();<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  if<\/span> (!digitalRead(TasterPin))\t\t\/\/ Wenn Taster bet\u00e4tigt \"Signal 0\"<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  {<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  val = !val;\t\t\t\t\t\t\t\t\t\t\t\t\t\/\/ Umschalten<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  set_relais(); delay(500<\/span>);\t\t\/\/ Entprellung, Warten bis der Taster Kontakt sich beruhigt hat<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>    while<\/span> (!digitalRead(TasterPin)) server.handleClient();\t\/\/ warten bis der Taster los gelassen wurde<\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>  }<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span>}<\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\n<\/span><\/span><\/code><\/span>Code-Sprache:<\/span> C++<\/span> (<\/span>cpp<\/span>)<\/span><\/small><\/pre>","protected":false},"excerpt":{"rendered":"
Die vorhandenen Funksteckdosen (433Mhz) haben nicht an allen Standorten sicher funktioniert. Deshalb habe ich einen Umbau der Steckdosen auf WLAN vorgenommen. Als WLAN-Modul wird der ESP8266-01 eingesetzt. Die…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-full-width.php","meta":{"footnotes":""},"class_list":["post-180","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/pages\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=180"}],"version-history":[{"count":37,"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/pages\/180\/revisions"}],"predecessor-version":[{"id":550,"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=\/wp\/v2\/pages\/180\/revisions\/550"}],"wp:attachment":[{"href":"https:\/\/dieter.dimo4u.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}