* added HM800 defines

* updated README.md

tools/esp8266/README.md

@@ -13,6 +13,13 @@ This code can be compiled using Arduino. The settings were:
 - Board: Generic ESP8266 Module
 - Flash-Size: 1MB (FS: none, OTA: 502kB)
 
+### Optional Configuration before compilation
+
+- number of supported inverters (set to 3 by default) `defines.h`
+- enable channel hopping `hmRadio.h`
+- DTU radio id `hmRadio.h`
+- unformated list in webbrowser `/livedata` `defines.h`, `LIVEDATA_VISUALIZED`
+
 
 ## Flash ESP with firmware
 
@@ -21,12 +28,12 @@ This code can be compiled using Arduino. The settings were:
 3. the ESP will start as access point (AP) if there is no network config stored in its eeprom
 4. connect to the AP, you will be forwarded to the setup page
 5. configure your WiFi settings, save, repower
-6. check your router for the IP address of the module
+6. check your router or serial console for the IP address of the module. You can try ping the configured device name as well.
 
 
 ## Usage
 
-Connect the ESP to power and to your serial console. The webinterface has the following abilities:
+Connect the ESP to power and to your serial console (optional). The webinterface has the following abilities:
 
 - OTA Update (over the air update)
 - Configuration (Wifi, inverter(s), Pinout, MQTT)
@@ -40,11 +47,14 @@ The serial console will print the converted values which were read out of the in
 
 For now the following inverters should work out of the box:
 
+- HM400
 - HM600
+- HM800
 - HM1200
 
 ## USED LIBRARIES
 
 - `Time`
 - `RF24`
+- `PubSubClient`