Update README.md

Author: datjan

README.md

@@ -1,2 +1,69 @@
 # esp8266-victron-mppt-solarchargecontroller
 This is a online information server with rest api based on esp8266 and Victron Solar MPPT Solar Charge Controller
+
+## Hardware
+The following hardware is required:
+```
+- D1 mini (ESP8266)
+- Level Shifter 3.3V / 5V
+- Victron MPPT Charge Controller (like SmartSolar 100/30)
+```
+
+Connection:
+
+D1 mini -> Level Shifter 3.3V / 5V
+```
+D7 / RX -> LV1 / TXI
+GND -> GND
+3V3 -> LV
+```
+
+Level Shifter 3.3V / 5V -> JST Port am Victron SmartSolar
+```
+HV1 / TX0 -> 2 (TX / White)
+GND -> 4 (GND / BLack)
+D1 mini -> MAX485
+```
+
+![alt text](https://github.com/datjan/esp8266-victron-mppt-solarchargecontroller/blob/main/connection-schema.png?raw=true)
+
+## Development
+This sketch is for following development environment
+```
+Arduino
+```
+
+Following libraries are required
+```
+https://github.com/me-no-dev/ESPAsyncTCP
+https://github.com/me-no-dev/ESPAsyncWebServer
+```
+
+## Setup
+Setup wifi in esp8266-victron-mppt-solarchargecontroller.ino:
+```
+const char* wifi_ssid = "xxx";
+const char* wifi_password = "xxx";
+```
+
+Setup victron device in config.h:
+```
+#define MPPT_100_30    // Define used Victron Device
+```
+
+## Upload to device
+Following files needs to be uploaded to the ESP8266 (D1 mini)
+```
+esp8266-victron-mppt-solarchargecontroller.ino
+index_page.h
+config.h
+```
+
+## Show info
+Access webpage on http://[IPADDR]
+![alt text](https://github.com/datjan/esp8266-victron-mppt-solarchargecontroller/blob/main/img_webpage.png?raw=true)
+  
+  
+Access rest api on GET http://[IPADDR]/rest
+![alt text](https://github.com/datjan/esp8266-victron-mppt-solarchargecontroller/blob/main/img_restapi.png?raw=true)
+