Add 'readme.md'

2021-04-26 00:00:53 -06:00 · 2021-04-26 00:00:53 -06:00 · 95906c5928
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+# Homie DS18B20 #
+
+## ESP01 and DS18B20 temperature sensor using Homie convention over MQTT ##
+
+## Notes ##
+
+* Using powered mode for ds18b20. Must supply power to power pin.
+* Used 10k resistor which works, 4.7k is what's suggested.