- Update ModulTester to use the `updateFilters()` Method
- Change the usage of `Serial2` to `this->_uart` in `serialSend()`

# Features

The library does provide a simple and secure way (error handling) of interacting with the Dorji DRA818X. All commands which are available for the module are implemented as methods:

- Handshake
- Frequency Scan
- Update group settings
- Volume
- Filter

For the group setting command and the filter command you will first need to set the given parameters with their corresponding setter methods. E.g. `setFrequency()`, `setRxFrequency()`, `setTxCTCSS()`, `setSquelch()`, `setEmphasisFilter()` and so on.

The library also provides error handling for incorrect wirering, wrong parameters, etc.