Using ESP8266 running frankenstein firmware for reading DS18B20
This flow makes a TCP connection to a frankenstein equipped ESP8266 and runs the ds18b20 command with a pin # specified in the flow. The hostname of the ESP8266 and the pin will probably need to be changed for your environment. You will absolutely need to put in your thinkspeak API key
This pumps the result to thingspeak and an mqtt publish.
Prototype of using the raw frankenstein in Node-Red.
[{"id":"e8835a.512c7ca8","type":"mqtt-broker","broker":"localhost","port":"1883","clientid":""},{"id":"54e75a26.ab18a4","type":"tcp request","server":"192.168.1.101","port":"23","out":"char","splitc":"10","name":"get temperature","x":464,"y":87,"z":"406c2328.bf93dc","wires":[["51d563e.fae2a9c"]]},{"id":"b6fb6d6b.49049","type":"inject","name":"pump","topic":"","payload":"LHZ\\r\\n","payloadType":"date","repeat":"300","crontab":"","once":true,"x":81,"y":80,"z":"406c2328.bf93dc","wires":[["593543bd.a6cabc"]]},{"id":"593543bd.a6cabc","type":"function","name":"construct ds18b20 cmd","func":"msg.payload = \"\\n\\r\\n\\r\\n\\rds18b20 2\\n\\r\"\nreturn msg;","outputs":1,"valid":true,"x":259,"y":88,"z":"406c2328.bf93dc","wires":[["54e75a26.ab18a4"]]},{"id":"51d563e.fae2a9c","type":"function","name":"stringify","func":"msg.payload = msg.payload.toString()\nreturn msg;","outputs":1,"valid":true,"x":627,"y":89,"z":"406c2328.bf93dc","wires":[["95a25950.6a5da8"]]},{"id":"390165a4.c6fe9a","type":"debug","name":"temperature parsed","active":true,"console":"false","complete":"payload","x":645,"y":167,"z":"406c2328.bf93dc","wires":[]},{"id":"c5d620ea.3a29e","type":"thingspeak","name":"thinkspeak plot","api_key":"APIKEY","field":"field2","x":491,"y":308,"z":"406c2328.bf93dc","wires":[]},{"id":"95a25950.6a5da8","type":"function","name":"parse reply","func":"var rstr = msg.payload.toString();\n\nvar T = null;\nvar other = null;\n\nif (rstr.indexOf(\"Temperature: \") > -1) {\n var tmp = rstr.split(/[\\s,]+/);\n T = { payload : tmp[1] };\n} else {\n other = { payload : rstr };\n}\n\nreturn [ T, other ];","outputs":"2","valid":true,"x":236,"y":171,"z":"406c2328.bf93dc","wires":[["390165a4.c6fe9a","2e1f04fa.d1e0fc","c5d620ea.3a29e"],["ce09b461.31f648"]]},{"id":"ce09b461.31f648","type":"debug","name":"other","active":false,"console":"false","complete":"payload","x":635,"y":259,"z":"406c2328.bf93dc","wires":[]},{"id":"2e1f04fa.d1e0fc","type":"mqtt out","name":"publish","topic":"/temperature","qos":"0","retain":"false","broker":"e8835a.512c7ca8","x":260,"y":304,"z":"406c2328.bf93dc","wires":[]}]
