I'm still struggling with Drizzle, trying to dispatch my own action. Based on the Drizzle box, I added the following to HomeContainer:

const mapDispatchToProps = dispatch => {
    return {
        onGetEthRate: (fiatSymbol) => dispatch(actions.getEthRate(fiatSymbol))
    };
};
const HomeContainer = drizzleConnect(Home, mapStateToProps, mapDispatchToProps);

The getEthRate action creator looks like this:

export const getEthRate = (fiatSymbol) => {
    console.log("Getting ETH rate for " + fiatSymbol);
    return {
        type: actionTypes.GET_ETH_RATE,
        fiatSymbol: fiatSymbol
    };
};

And then I registered a saga to process that action in rootSaga.js:

export default function* root() {
    yield all(
        drizzleSagas.map(saga => fork(saga)),
        takeEvery(actionTypes.GET_ETH_RATE, getEthRateSaga)
    );
}

But the following saga is never triggered, as I never see the log in the console:

export function* getEthRateSaga(action) {
    console.log("Fetching ETH rate for " + action.fiatSymbol);
    try {
        const response = yield http.get('/price?fsym=ETH&tsyms=' + action.fiatSymbol);
        const rate = response.data[action.fiatSymbol];
        yield put(actions.updateEthRate(action.fiatSymbol, rate));
    } catch(error) {
        console.error(error);
    }
}

And based on the Redux dev console, the GET_ETH_RATE action is not even dispatched, so I'm wondering if mapDispatchToProps works with drizzleConnect.

I'm still struggling with Drizzle, trying to dispatch my own action. Based on the Drizzle box, I added the following to HomeContainer:

import Home from './Home';
import {drizzleConnect} from 'drizzle-react';
import * as actions from '../../store/actions/actions';

// May still need this even with data function to refresh component on updates for this contract.
const mapStateToProps = state => {
    return {
        accounts: state.accounts,
        SimpleStorage: state.contracts.SimpleStorage,
        TutorialToken: state.contracts.TutorialToken,
        Series: state.contracts.Series,
        drizzleStatus: state.drizzleStatus,
        rates: state.rates.ethRate
    }
};

const mapDispatchToProps = dispatch => {
    return {
        onGetEthRate: (fiatSymbol) => {console.log(dispatch); dispatch(actions.getEthRate(fiatSymbol));}
    };
}; 

const HomeContainer = drizzleConnect(Home, mapStateToProps, mapDispatchToProps);

export default HomeContainer;

The getEthRate action creator looks like this:

export const getEthRate = (fiatSymbol) => {
    console.log("Getting ETH rate for " + fiatSymbol);
    return {
        type: actionTypes.GET_ETH_RATE,
        fiatSymbol: fiatSymbol
    };
};

And then I registered a saga to process that action in rootSaga.js:

export default function* root() {
    yield all(
        drizzleSagas.map(saga => fork(saga)),
        takeEvery(actionTypes.GET_ETH_RATE, getEthRateSaga)
    );
}

But the following saga is never triggered, as I never see the log in the console:

export function* getEthRateSaga(action) {
    console.log("Fetching ETH rate for " + action.fiatSymbol);
    try {
        const response = yield http.get('/price?fsym=ETH&tsyms=' + action.fiatSymbol);
        const rate = response.data[action.fiatSymbol];
        yield put(actions.updateEthRate(action.fiatSymbol, rate));
    } catch(error) {
        console.error(error);
    }
}

And based on the Redux dev console, the GET_ETH_RATE action is not even dispatched, so I'm wondering if mapDispatchToProps works with drizzleConnect.