Aart MQTT notes
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These are my personal notes & developments; any opinion expressed on this page is just that :-)
Inhoud
MQTT on Wifi Principals
- Assume no privacy
- Send data, not information for scalability
- Minimize the amount of wires, use more nodes if required
ESP8266 Node firmware development
Makerspace Leiden workshop op 23-01-2017
ESP Boards
Sensors
Links
Use proven test programs & setups to test the sensors, hardware and Wifi / MQTT setup before putting it all together.
Links to datasheets, standard libraries & examples of sensors i use; use the Arduino library manager to get these:
- DS18S20 One-wire thermometer. Datasheet OneWire
- Neopixel leds: Datasheet FastLED library
- HIH6030 i2c temperature & humidity. Datasheet Honeywell HIH library
- Senseair K30 CO2 sensor Datasheet
- MQTT: Adafruit library
My own code
- Non blocking Single DS reader demo
- Non blocking gasMeter demo
- Non blocking Multiple DS reader demo
- HIH6030 reading routines HIH6030 demo
- Thermal voltage sensor demo
Pi3B Broker
Makerspace Leiden workshop on 27-02-2017
Raspbian
- Download: Raspbian lite
- Install on SD card following the instructions
Using a serial console
- add line "enable_uart=1" at the end of /boot/config.txt
- Pins: GPIO 6 gnd, 8 Pi Txd, 10 Pi RxD - 3V3 logic levels (!)
- Speed: 115200
Update
Run:
- apt update
- apt -y upgrade
