IoT DevFest 2018

What is Bluetooth Low Energy?

Web Bluetooth

https://chirpers.com

ESP32 + LoRa

This firmware for today: https://github.com/monteslu/iotdevfest18/blob/master/iotdevfest_lora/iotdevfest_lora.ino

Badge Assembly

• remove paper from acrylic
• attach battery holder
• addatch esp32 board & connect power
• solder neopixel strip
• attach neopixels
• insert battery

Sending Bytes.

Our main service Id for the badge: 6e400001-b5a3-f393-e0a9-e50e24dcca9e

characteristics

• lora relay Characteristic 6e400002-b5a3-f393-e0a9-e50e24dcca9e

• configure screen bada5566-e91d-1337-a49b-8675309fb070

  • [1, 16, 0, 0]
  • first byte = 1 to clear screen, 0 to leave as is
  • second byte = font size 10, 16, or 24
  • third byte = draw position X
  • fourth byte = draw position Y

• write characters to screen bada5566-e91b-1337-a49b-8675309fb070

• write characters , but clear first bada5566-e91c-1337-a49b-8675309fb070

• Neopixels on pin 12 bada5566-e91a-1337-a49b-8675309fb070

  • [255,0,0, 127,127,0, 0,0,50]
  • 9 bytes. for RGB values for each of the 3 neopixels

last resort...

If you're having trouble getting things going, you can import this flow into chirpers:

[{"id":"THlS0XtcvO0","type":"chirpers in","z":"mDRMOWxAyVw","name":"lora broadcasts","directToMe":false,"device":"f4a2b572-b33f-495d-a8f1-7271815d40a4","x":210,"y":466,"wires":[["AC6hzIu9jGQ"]]},{"id":"AC6hzIu9jGQ","type":"debug","z":"mDRMOWxAyVw","name":"","active":true,"console":"false","complete":"false","x":444,"y":559,"wires":[]},{"id":"a6rGzwzPHRk","type":"inject","z":"mDRMOWxAyVw","name":"pixel colors","topic":"","payload":"[255,0,0, 127,127,0, 0,0,50]","payloadType":"json","repeat":"","crontab":"","once":false,"allowDebugInput":false,"x":201,"y":69,"wires":[["snIWft_QO10"]]},{"id":"snIWft_QO10","type":"bluetooth out","z":"mDRMOWxAyVw","name":"pixel control","deviceName":"","characteristicId":"bada5566-e91a-1337-a49b-8675309fb070","bleServiceId":"6e400001-b5a3-f393-e0a9-e50e24dcca9e","x":460,"y":160,"wires":[]},{"id":"E2NNdB_APLE","type":"bluetooth out","z":"mDRMOWxAyVw","name":"lora out","deviceName":"","characteristicId":"6e400002-b5a3-f393-e0a9-e50e24dcca9e","bleServiceId":"6e400001-b5a3-f393-e0a9-e50e24dcca9e","x":472,"y":274,"wires":[]},{"id":"weqrjybYQ4g","type":"inject","z":"mDRMOWxAyVw","name":"","topic":"","payload":"hello world","payloadType":"str","repeat":"","crontab":"","once":false,"allowDebugInput":false,"x":214,"y":243,"wires":[["E2NNdB_APLE"]]},{"id":"hTYhRgiSRac","type":"bluetooth out","z":"mDRMOWxAyVw","name":"write to screen","deviceName":"","characteristicId":"bada5566-e91c-1337-a49b-8675309fb070","bleServiceId":"6e400001-b5a3-f393-e0a9-e50e24dcca9e","x":487,"y":394,"wires":[]},{"id":"g-W8-dXYkmo","type":"inject","z":"mDRMOWxAyVw","name":"","topic":"","payload":"I love this badge!","payloadType":"str","repeat":"","crontab":"","once":false,"allowDebugInput":false,"x":193,"y":373,"wires":[["hTYhRgiSRac"]]}]

Arduino libraries

• LoRa
• OLED SSD1306