SLÁN - Shannon Lorawan Area Network

 I put this together yesterday for the Mens Shed. It now needs to undergo field trials. And you can see its graphs at:  https://shannontownwetlands.ie/environmental-sensors/shannon-town-mens-shed-central-heating The wiring of the three DS18B20 three wire (ground, power and data) probes in parallel and connecting two 2K2R resistors in series was tricky and I cable tied the arrange to a clothes peg! How to get Tasmota on the device is covered here (and its part 1 video): You can use the Tasmota menus to cusomise the name of the sensor and the prefix for the MQTT topic it sends its temperature values to tele/shannon_town_mens_shed/tasmota_3157E1/SENSOR I then wrote some Node-Red code to subscribe to this topic and create a document with the three temperatures to publish to my MongoDB account so I can create a chart (graph) I can embed into blogs and websites.

These are based on Heltec LoRa Capsules. A good write is available here: https://emanuelepagliari.it/2020/11/09/arduino-lorawan-heltec-cubecell-capsule-review/ Unfortunately, Heltec's own website have dropped their webpages for these devices! Why do manufacturers do this? Cannot they move them to an archive or past products page "hall of Fame". Others still seem s to be selling them though: https://iotci.co.uk/product/heltec-lora-node-asr6502-capsule-sensors-cubecell-sensor-for-arduino-lora-iot-waterproof-ip67-soalr-panel/ They are cute little devices the size of a Kindle egg and have a small solar powered li-ion battery and swapable sensors. So both slan-008 and slan-093 use these devices with a BME680 sensor plugged in. Here's a debug listing from the Arduino IDE sketch flashed to a similar slan-012: