add README

README.md

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+# esp32-weatherstation2
+
+Wetterstation v2 with ESP32 and various sensors (with ESPHome!)
+
+[![Build Status](https://drone.xd0.de/api/badges/hendrik/esp32-weatherstation/status.svg)](https://drone.xd0.de/hendrik/esp32-weatherstation)
+
+## Hardware
+* ESP32 µC
+* Sensors
+
+## Wiring
+
+### Display
+
+Connect to TFT LCD Port with 10P SH1.0 cable
+
+E-Paper pin | ESP32 pin | Notes
+------------|-----------|------------
+3V3         |           |
+BUSY        | nc        |
+CS          | IO14      |
+SCK         | IO18      |
+MOSI        | IO23      | MISO: IO19
+DC          | IO27      |
+RST         | IO33      |
+GND         |           |
+
+### BME680
+
+I2C
+
+BME680 pin | ESP32 pin | Notes
+-----------|-----------|----------
+VCC        | 3V        |
+GND        | GND       |
+SCL        | IO22      |
+SDA        | IO21      |
+SDO        | nc        | SPI only
+CS         | nc        | SPI only
+
+### BH1750 (GY-302)
+
+I2C
+
+GY-302 pin  | ESP32 pin | Notes
+-----------|-----------|----------
+VCC        | 3V        |
+GND        | GND       |
+SCL        | IO22      |
+SDA        | IO21      |
+ADDR       | nc        | select addr: GND: 0x23 or VCC: 0x5C
+
+### VEML6075
+
+I2C
+
+GY-VEML6075 pin  | ESP32 pin | Notes
+-----------|-----------|----------
+VIN        | 3V        |
+GND        | GND       |
+SCL        | IO22      |
+SDA        | IO21      |
+
+### SDS011
+
+Serial (HardwareSerial2)
+
+SDS011 pin | ESP32 pin | Notes
+-----------|-----------|----------
+TXD        | IO15      | (don't use IO16 together with PSRAM)
+RXD        | IO2       | (don't use IO17 together with PSRAM)
+GND        | GND       |
+25µm       | nc        |
+5V         | VUSB      | 5V
+1µm        | nc        |
+NC         | nc        |
+
+## Build & Install
+
+ * Install ESPHome via Home-Assistant Supervisor
+ * Upload all needed files via the "File editor" into `config/esphome/` and subdirectories.
+ * rename secrets-example.yaml to secrets.yaml and fill in your credentials
+ * Choose your device and flash the firmware. Use ESPHome "Install" -> "Plug into this computer". (Subsequent updates can be done wirelessly.)
+
+### Files
+
+```
+.
+├── common                (components, used by the devices)
+│   ├── base.yaml
+│   ├── battery.yaml
+│   ├── bh1750.yaml
+│   ├── bme280.yaml
+│   ├── bme680.yaml
+│   ├── display.yaml
+│   ├── sds011.yaml
+│   ├── secrets.yaml
+│   ├── veml6075.yaml
+│   └── experimental              (experiments, skip these)
+│       ├── ble.yaml
+│       └── webserver.yaml
+├── custom                      (used by custom components)
+│   └── veml6075_custom_sensor.h
+├── fonts                       (used by display component)
+│   ├── materialdesignicons-webfont.ttf
+│   ├── slkscr.ttf
+│   ├── VeraMono.ttf
+│   ├── Vera.ttf
+│   └── weather_icon_map.h
+├── secrets.yaml                        (edit example file)
+│                      (the individial device descriptions)
+├── sensor-outdoor.yaml
+├── sensor-springer.yaml
+├── sensor-sz.yaml
+└── sensor-wz.yaml
+```
+
+## Authors
+
+* **Hendrik** - *Initial work* - [hendrik](https://dev.xd0.de/hendrik)
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details
+
+## Acknowledgments
+
+* [ESPHome](https://esphome.io) - ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful configuration files
+* [Home Assistant](https://home-assistant.io) - Open source home automation that puts local control and privacy first