Admin at 10:07, 27 July 2020

2020-07-27T10:07:39Z

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JSON things I used in my node-red home automation projects

Code to read multiple DS18B20 or DS18S20 temperature sensors from a Wemos D1 mini and feed them into a graph object in node-red

<pre>
var obj = JSON.parse(msg.payload);

/*
example output from topic 'house/wemos2/tele/SENSOR'

{
"Time":"2020-07-26T10:38:21",
"DS18S20-1":{"Id":"000802015ED5","Temperature":20.3},
"DS18B20-2":{"Id":"02131E3901AA","Temperature":19.8},
"TempUnit":"C"
}
*/

if ("DS18S20-1" in obj)
{
var msg1 = {
payload : obj['DS18S20-1'].Temperature,
topic : "Peltier-Cold"
}
}

if ("DS18B20-2" in obj)
{
var msg2 = {
payload : obj['DS18B20-2'].Temperature,
topic : "Inside Box"
}
}

if ("DS18B20-3" in obj)
{
var msg3 = {
payload : obj['DS18B20-3'].Temperature,
topic : "Peltier Hot"
}
}

node.send([[msg1,msg2,msg3]]);
</pre>

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Admin at 10:07, 27 July 2020