Micropython Gotchas

on YouTube ↗27m

" summary

A thermal printer project runs on a Pycom LoPy (ESP32) with 512 KB RAM and 4 MB flash but fails on an esp8266 ~25KB RAM because bytecode compilation consumes RAM; using mpy-cross to precompile and freezing modules fixes that. UART APIs differ across ports—ESP8266 implementation rejects pins and UART construction varies—time functions return integer seconds on some ports and ticks_diff argument order swaps on others, so a small platform-detection shim and platform-specific modules make the code actually work.

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" chapters (16)

1. 0:00Start
2. 3:58MicroPython port
3. 5:42Hardware again
4. 6:17Let's run it!
5. 6:33Fact #1
6. 7:22Crosscompile
7. 7:35Prepare the cross compiler
8. 7:47Compile, upload
9. 8:21Configure UART
10. 8:47The library code
11. 10:32Solution
12. 12:29Suspicious code usage
13. 16:03Suspicous code (again)
14. 16:55ESP8266
15. 19:27Summing up
16. 21:08Let's talk about UART

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