My activity with the ESP8266/ESP32 boards had somehow fallen asleep after I set up one of the ESP8266 as Wifi-repeater. It worked, but creating own devices was too cumbersome. Firing up the ArduinoStudio took ages, building and downloading the firmware in C++ was error-prone, took ages (seriously, this is a tiny program, what the hell happens in the background?).
But I knew there exists a path, which could save some time: µPython (micropython). It runs a firmware, you just deploy your “code”. In my case now a tiny hello-world-like program.
I used this and that tutorial and the uPyCraft-IDE. Got it working with an ESP8266 in minutes.
Seriously: goodbye crappy, non-structured and slow-to-build C/C++ for my microcontrollers. The future is here o/
By the way: the motivation also comes from my current daily practice of Python (of course, I still contribute to C++/Qt-based projects), but my current flame is Python (for Project Euler and daily coding challenges).
Ordered myself two Wifikit8 Esp8266-based boards from Aliexpress.
Received them after roundabout two weeks and now the fun can start.
With the integrated 0.91″ display (128×32 Pixel) a lot of effort for integrating some display or LEDs can be saved. Just noticed that a LiPo-charger is built-in as well, wow. For 4,50 € not a bad choice. But I am not 100% sure if this is the real device or some copycat – nevertheless: in the end the functionality matters.
First project-idea is to create an extended and verifyable version of the random-reviewer. With display of the currently chosen person, a big buzzer-button as trigger and a web-interface for those who doubt the true randomness ..
- https://robotzero.one/heltec-wifi-kit-8/ – hints for the board itself
- https://www.bastelgarage.ch/heltec-wifi-kit8-board-esp8266-32mbit – hints for the board itself
- https://github.com/olikraus/u8g2/wiki/u8x8reference#drawstring – library for drawing text; works well
Three weeks ago, while being in the garden, I noticed that there is no network connectivity except by superslow EDGE. Of course, three walls block the Wifi-router, but what about one repeater which is closer and just shielded by one wall? Also I remembered having read about the usage of some ESP-nodes for that. I don’t like the approach of buying some closed-source-product.
Short research yielded the project from martin-ger on Github, which I wanted to use. I was surprised that nothing for the ESP32 is available (only for ESP8266). So I tracked down my single ESP8266 (LoLin, NodeMCU, not sure which revision, but with CH340G-USB-connect and as DevKit (mingling with pulldown-resitors would add another layer of complexity, which I am not sure I want to tackle).
Turns out I could not flash the given item properly with the ESP8266 Download Tool 3.65. It blinks while doing so, but follow-up seral-monitoring onyl yields “lolin ts Jan 8 2013,rst cause:2, boot mode:(3,6)”.
So I ordered a from a german shop a new ESP8266. Looks like exactly the same model.
Will do some quicktest now with the blink-app (basic functionality and flashing works?). And then do a test with the ESP Download tool.
More later ..