Set the peripheral's timeout to 0 and turn on the characteristic's subscribe flag to maintain notifications forever or until the device is disconnected. A third SHT21 sensor will push its temperature (2a6e) when the characteristic changes.Īn example flow of subscribing to a peripheral's ccc5 characteristic. ExampleĪn example flow of two temperature sensors being polled every 30 minutes and characteristics exposed over Homebridge/MQTT. This node will let you fish out characteristic data.Īfter the characteric node has run, msg.payload will contain its data - this can be shunted to other nodes like MQTT, Twitter or a debug node. It is a visual, flow-based development environment that allows you to. You need it.Ĭonnect a characteristic node to the service node. Node-RED is a popular open source IoT software that was originally developed by IBM. This does not run by itself - hook up a trigger to it!Ĭonnect a peripheral node to the scanner node and configure it to your liking, or don't.Ĭonnect a service node to the peripheral node. Installation sudo npm install node-red-contrib-ignobleĬreate a scanner node. Tested with Raspberry Pi Zero W (CYW43438), Nano Pi NEO AIR (AP6212A), and Red Bear BLE Nano V2 (nRF52x). Ignoble is a noble node-red node allowing you to interact with your Bluetooth Low Energy devicesĪ Node-Red BLE (Bluetooth Low Energy) central module.
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