MicroPython on an ESP8266 @ NAP (Apr 2019)

Transcript

1. C. Cooper MicroPython on an ESP8266 MicroPython on an ESP8266 April 27th, 2019 Presented by Christopher Cooper speakerdeck.com/ccooper21 ccooper21@gmail.com
2. C. Cooper MicroPython on an ESP8266 HELLO! I am Chris Cooper › I design, implement, and deploy enterprise software › I was the Solution Architect and Program Manager for Ford’s DealerConnection platform › I play with microcontrollers and MicroPython for fun 2
3. C. Cooper MicroPython on an ESP8266 3
4. C. Cooper MicroPython on an ESP8266 NodeMCU board w/ ESP-12F module 4
5. C. Cooper MicroPython on an ESP8266 In 2013, Damien George asked… Q: Can a microcontroller be programmed using a high-level language? PyBoard v1.1 w/ pin headers (ARM Cortex M4F MCU @ 168Mhz) 5
6. C. Cooper MicroPython on an ESP8266 MicroPython KickStarter goals and deliveries completed on April 12th, 2015 PyBoard v1.1 w/ pin headers (ARM Cortex M4F MCU @ 168Mhz) 6
7. C. Cooper MicroPython on an ESP8266 What is an MCU? › “System-on-a-Chip” › Programmable I/O › Highly power efficient › Low cost › Typically, no operating system Atmel ATtiny85 MCU @ 20Mhz 7
8. C. Cooper MicroPython on an ESP8266 Where are microcontrollers used? 8
9. C. Cooper MicroPython on an ESP8266 Everywhere! 9
10. C. Cooper MicroPython on an ESP8266 What is an ESP8266? › Up to 160Mhz › 160KB RAM › 4MB ROM (ext. flash) › Built-in wi-fi › ~ $4.50 per unit (NodeMCU) ESP-01 module (Espressif ESP8266EX MCU @ 160Mhz) 10
11. C. Cooper MicroPython on an ESP8266 Let’s use an Arduino Uno... › Not enough RAM (2KB) › Not enough ROM (32KB) › Much slower › No wi-fi › MicroPython Arduino Uno R3 (Atmel ATmega168P MCU @ 16Mhz) 11
12. C. Cooper MicroPython on an ESP8266 Let’s use a Raspberry Pi... › Is a miniaturized computer › Not power efficient › Much more expensive › Not hard real-time suitable Raspberry Pi 3 Model B (4x ARM Cortex A53 cores @ 1.2Ghz) 12
13. C. Cooper MicroPython on an ESP8266 Computational Comparison 13
14. C. Cooper MicroPython on an ESP8266 Computational Comparison 14
15. C. Cooper MicroPython on an ESP8266 MicroPython vs. CPython Similarities › Language syntax and semantics › REPL (Web enabled on ESP8266) › “pip” for PyPI packages (“upip” in uPy) › Open source › Written in C 15
16. C. Cooper MicroPython on an ESP8266 MicroPython vs. CPython Differences › Subset of standard modules and functionality › Addition of hardware oriented modules › Language enhancements › Memory management › License - MIT vs. PSFL v2 16
17. C. Cooper MicroPython on an ESP8266 Tutorial 17
18. C. Cooper MicroPython on an ESP8266 Contact Me E-mail: ccooper21@gmail.com GitHub: @ccooper21 18 Creative Commons Attribution: Presentation template by SlidesCarnival See these slides again speakerdeck.com/ccooper21 See the code github.com/ccooper21/nap_apr2019
19. C. Cooper MicroPython on an ESP8266 APPENDIX 19
20. C. Cooper MicroPython on an ESP8266 MCU Comparison 20 Product Core Freq RAM ROM $/10K DMIPS Atmel ATtiny85 Atmel AVR (8-bit) 20Mhz 0.5KB 8KB $0.78 Atmel ATmega328P Atmel AVR (8-bit) 20Mhz 2KB 32KB $1.54 ~7 Nordic nRF52 ARM Cortex M4F (32-bit) 64Mhz 64KB 512KB < $2.60 ~80 Espressif ESP8266EX Tensilica Xtensa LX106 (32-bit) 160Mhz 160KB 4MB (ext.) < $2.45 ~105 Intel Pentium (1994) Intel x86 (32-bit) 100Mhz N/A N/A ~169 NXP MK66 ARM Cortex M4 (32-bit) 180Mhz 256KB 1MB $10.95 ~225 Espressif ESP32 Tensilica Xtensa LX6 (32-bit; dual core) 240Mhz 520KB 4MB (ext.) < $4.39 ~600
21. C. Cooper MicroPython on an ESP8266 ESP8266 packaging 21 - ESP8266EX IC - ~$1.50 (from China) - Specs: - 160 Mhz (max.) - 80 Mhz (def.) - 160KB RAM - ESP-12F (ESP-xx) module - ~$3.00 (from China) - Adds: - Flash IC (4MB) - Oscillator - Wi-Fi antenna - FCC certification - NodeMCU board - ~$4.50 (from China) - ~$9.00 (from Amazon) - Adds: - Regulated power - USB/serial interface - GPIO pin breakout
22. C. Cooper MicroPython on an ESP8266 NodeMCU › Initially, LUA language implementation for ESP8266 › Same team created open source hardware design for popular ESP8266 development board HiLetGo NodeMCU development board 22
23. C. Cooper MicroPython on an ESP8266 CircuitPython › Fork of MicroPython controlled by Adafruit › Goal to make MicroPython more accessible to beginners and hobbyists Adafruit Circuit Playground Express board 23
24. C. Cooper MicroPython on an ESP8266 Additional References › MicroPython Official Site › http://micropython.org/ › MicroPython Getting Started Tutorial (ESP8266 variant) › https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html › MicroPython Documentation (ESP8266 variant) › http://docs.micropython.org/en/latest/esp8266/ › MicroPython Discussion Forum › https://forum.micropython.org/ › MicroPython GitHub repositories › “micropython”: https://github.com/micropython/micropython/ › “micropython-lib”: https://github.com/micropython/micropython-lib/ › “webrepl”: https://github.com/micropython/webrepl/ 24