some changes

Author: budulinek

Payload-data-read.md

@@ -128,14 +128,16 @@ Header: 400010
 | 9        | 00                 | ?
 |10        | 1A                 | ?
 |11:2      | 0/1                | Quiet mode (off/on)      | bit
+|11:1      | 0/1                | **?? (end of disinfection)** | bit
+|11:0      | 0/1                | **Disinfection mode (off/on)** | bit
 |11        | 0                  | ?                        | bit
 |12        | 00                 | Error code part 1        | u8
 |13        | 00                 | Error code part 2        | u8
 |14        | 00                 | Error subcode            | u8
 |15-17     | 00                 | ?
 |17:1      | 0/1                | Defrost operation        | bit
 |18:3      | 0/1                | Circ.pump (off/on)       | bit
-|18:1      | 0/1                | ?                        | bit
+|18:1      | 0/1                | **Backup Heater step 1 DHW (off/on)** | bit
 |18:0      | 0/1                | Compressor (off/on)      | bit
 |18:other  | 0                  | ?                        | bit
 |19:2      | 0/1                | DHW mode                 | bit

arduino-altherma-controller/05-pages.ino

@@ -30,6 +30,17 @@ const byte WEB_OUT_BUFFER_SIZE = 64;  // size of web server write buffer (used b
 void sendPage(EthernetClient &client, byte reqPage) {
   char webOutBuffer[WEB_OUT_BUFFER_SIZE];
   ChunkedPrint chunked(client, webOutBuffer, sizeof(webOutBuffer));  // the StreamLib object to replace client print
+  /*
+
+use HTTP/1.0 because 
+- HOSTS: isn't necessary as the Arduino will only host one server.
+- in HTTP/1.1 HOSTS: is mandatory (and necessary if you HOST more than one site on one server) and the server should answer a request with "400 Bad Request" if it is missing
+- we don't need to send a Content-Length in HTTP/1.0
+
+An advantage of HTTP 1.1 is
+- you could keep the connection alive
+ 
+ */
   if (reqPage == PAGE_ERROR) {
     chunked.print(F("HTTP/1.1 404 Not Found\r\n"
                     "\r\n"