Update README.md

JeromeGillard · Jul 26, 2017 · e7cca13 · e7cca13
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 # node-red-i2c-nodes
 A collection of node-red nodes for assorted i2c devices
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+All nodes use an [ inject ] node to send a string command of 'measure' to initiate sensor measurement based on values set in the config panels of the flow diagram.
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+Outputs:
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+#1 - measured and derived and calculated values from the sensor
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+#2 - same as #1 but organized as AWS 'Thing State' for transmission to an AWS IOT MQTT broker.