17 May '16, 5pm

Minimal MQTT: Networked Nodes

Yeah, the NodeMCU is a good Expressif board. The only real problem with ESP chips are that they are power hungry. Running them off of battery won’t get you terribly far, unfortunately…. But if it’s IoT in the house, you’re going to have nice stable power for the most part. There are areas where IoT may be wanted that you also don’t want to plug in: Bathroom, moveable-buttons (ala amazon button), doorbell ringer, anything in contact with water, and outside perimeter of house. Those areas, an Arduino and a nRF24L01+ chip do much better. The Nordic Semiconductors are awesome little chips at low power and great bandwidth. I use MySensors library, and have a gateway that posts all data to and from to Mosquitto. And then I use Node-Red to glue it all together, so that any sensor, actuator, or logic can change the state of what’s going on in the network :)

Full article: http://hackaday.com/2016/05/17/minimal-mqtt-networked-nodes/

Tweets

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