Starting a WeMos shield series on the second channel... have fun.
This WeMos shield can be used to run the microcontroller und other shields from a lithium battery. It also charges ist up if USB is connected. Get the shield from here: http://s.click.aliexpress.com/e/iEAuBiMby ..and the WeMos from here: http://s.click.aliexpress.com/e/qZnIMRVn2 Check out my Patreon page for extra stuff: https://www.patreon.com/bitluni
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