Download as PDF, PPTX
More Related Content
Similar to Elastic network of things with mqtt and micro python
Elastic network of things with mqtt and micro python
- 1. Elastic Network ofThings with MQTT and MicroPython PyCon TW 2017 Wei Lin source of picture
- 2.
- 3.
- 4. 4 Considerations • Deploy, maintain,evolve – With distributed devices • Coordinate a group of devices – IF This Then That – IF These Then Those ? • Devices coverage – Small – Low cost • use Python on MCU?
- 5. 5 MicroPython (uPy) http://micropython.org/ 2014/5/3 ~ •Damien George • George Robotics Limited
- 6. 6 ESP8266 RISC 32bits 80Mhz 64KB+ 96KB SRAM
- 7.
- 8. 8 ESP-12 module pinouts https://nettigo.eu/products/esp-8266-12-wifi-module-with-9-gpio--2 https://learn.adafruit.com/building-and-running-micropython-on-the-esp8266/flash-firmware 3.3Vonly !3.3V only ! 5V will kill it !5V will kill it !
- 9.
- 10. 10 ESP8266 erase Flash https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html https://learn.adafruit.com/building-and-running-micropython-on-the-esp8266/flash-firmware • Installesptool pip install esptool • erase Flash esptool.py --port COM13 --baud 115200 erase_flash
- 11. 11 ESP8266 flash uPy firmware https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html https://learn.adafruit.com/building-and-running-micropython-on-the-esp8266/flash-firmware •Download firmware – http://micropython.org/download#esp8266 • Flash firmware – esptool.py --port COM13 --baud 115200 write_flash --flash_size=32m 0x00000 ../firmware/MicroPython_ESP8266.bin
- 12. 12 This is MicroPython! https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html REPL: Read-Eval-Print Loop https://learn.adafruit.com/micropython-basics-how-to-load-micropython-on-a-board/serial-terminal
- 13. 13 uPy upload script file https://learn.adafruit.com/micropython-basics-esp8266-webrepl/send-and-get-files https://learn.adafruit.com/micropython-basics-load-files-and-run-code/overview •install ampy ( Adafruit MicroPython Tool ) pip install adafruit-ampy • ampy commands – list files ampy --port {com_port} ls – cat file ampy --port {com_port} get {file} – remove file ampy --port {com_port} rm {file} – upload file ampy --port {com_port} put {file} ex: ampy –port COM13 putput script.py Remember to : • break main loop • surrender COM port
- 14. 14 uPy – filesystem& flow https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/filesystem.html • uPy boot.py main.py • Arduino setup( ) loop( )
- 15. 15 MicroPython libraries https://docs.micropython.org/en/latest/pyboard/library/ • MicroPython-specificlibraries – btree – simple BTree database – framebuf — Frame buffer manipulation –– machinemachine — functions related to the hardware – micropython – MicroPython internals – network — network configuration – uctypes – access binary data in a structured way
- 16. 16 uPy – ESP8266 documents •MicroPython docs for ESP8266 – http://micropython.org/resources/docs/en/ latest/esp8266/ # Blink LED from machine import Pin p2 = Pin(2, Pin.OUT) p2.value(0)
- 17. 17 Setup WiFi connection https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/network_basics.html importnetwork nic=network.WLAN(network.STA_IF) nic.active(True) nic.connect('SSID','password') nic.ifconfig() # ESP8266 remembers last successful connection
- 18. 18 Packages for MicroPython https://pypi.python.org/pypi?%3Aaction=search&term=micropython&submit=search •https://pypi.python.org/pypi?%3Aactio n=search&term=micropython&submit =search
- 19.
- 20.
- 21. 21 MQTT messaging one toone https://sakshambhatla.wordpress.com/2014/08/11/simple-mqtt-broker-and-client-in-python/ broker Node n_Alpha Subscribe uPy / n_Alpha uPy / Hub Node n_Beta Subscribe uPy / n_Beta uPy / Hub Node Client publish topic = “uPy / n_Alpha” payload = “Hello”
- 22. 22 MQTT messaging one toone https://sakshambhatla.wordpress.com/2014/08/11/simple-mqtt-broker-and-client-in-python/ broker Node n_Alpha Subscribe uPy / n_Alpha uPy / Hub Node n_Beta Subscribe uPy / n_Beta uPy / Hub Node Client publish topic = “uPy / n_Beta” payload = “Hello”
- 23. 23 MQTT messaging broadcast https://sakshambhatla.wordpress.com/2014/08/11/simple-mqtt-broker-and-client-in-python/ broker Node n_Alpha Subscribe uPy/ n_Alpha uPy / Hub Node n_Beta Subscribe uPy / n_Beta uPy / Hub Node Client publish topic = “uPy / Hub” payload = “Hello”
- 24. 24 MQTT messaging collect https://sakshambhatla.wordpress.com/2014/08/11/simple-mqtt-broker-and-client-in-python/ broker Node Boss Subscribe uPy/ * Node Client publish topic = “uPy / n_Alpha”or “uPy / n_Beta”or “uPy / Hub”
- 25.
- 26.
- 27. 27 Deployment diagram Docker container onRaspberry Pi
- 28. 28 Demo 1 • Note:shown code is experimental and for demonstration only.
- 29.
- 30. 30 Message types andswitch
- 31.
- 32.
- 33.
- 34.
- 35.
- 36.
- 37.
- 38.
- 39. 39 Transmit behavior, notjust data
- 40. 40 IPython Parallel (IPP)architecture https://ipython.org/ipython-doc/3/parallel/parallel_intro.html
- 41. 41 IPP • Message format –http://ipyparallel.readthedocs.io/en/latest/development/messages.html – http://ipyparallel.readthedocs.io/en/latest/development/connections.html#parallel- connections • Transmitting behavior(function) 1. serialize function object and args 2. transmit 3. un-serialize function object and args 4. execute – https://github.com/ipython/ipyparallel/blob/master/ipyparallel/serialize/serialize.py – https://github.com/ipython/ipyparallel/blob/master/ipyparallel/serialize/canning.py
- 42. 42 Demo 2 • Note:shown code is experimental and for demonstration only.
- 43.
- 44.
- 45.
- 46.
- 47. 47 Input & Outputas vectors • Input as a vector • Output as a vector
- 48. 48 If This ThenThat
- 49.
- 50. 50 Machine to MachineMachineto Machine && Event SystemEvent System
- 51.
- 52.
- 53.
- 54.
- 55.
- 56. 56 Classes using frozen modules:https://learn.adafruit.com/micropython-basics-loading-modules/frozen-modules
- 57. 57 Demo 3 • Note:shown code is experimental and for demonstration only. • using frozen modules technique: – https://learn.adafruit.com/micropython- basics-loading-modules/frozen-modules
- 58.
- 59.
- 60.
- 61. 61 If These ThenThose
- 62.
- 63.
- 64. 64 User Interface –modern version
- 65. 65 About Me • WeiLin – Twitter: @Wei_1144 – Email: Wei1234c@gmail.com • GitHub rep. for this talk: https://github.com/Wei1234c/Elastic_Network_of_Things_with_ MQTT_and_MicroPython
- 66. 66 Q & AQ& A