Prolific hacker [kodera2t] is working on his own “ESP32 monster board” dev board for the still-newish ESP32 WiFi module. His board has everything: Ethernet, OLED, LiPo, and even CAN-bus. But all that peripheral connectivity is worth nothing if you can’t program the microcontroller to use it.
The Arduino environment for the ESP32 is coming along quite nicely, but it’s not yet fully featured enough to run all of [kodera2t]’s hardware. To take advantage of all that, he needs to use Espressif’s SDK — called the “IoT Development Framework” or IDF for short. In his latest project log, [kodera2t] goes through everything necessary to get the IDF up and compiling on OSX. (It’s strangely similar to the Linux procedure.) Read through the official instructions here, if you want more, but we think [kodera2t] hits all the high points.
While we’re tooting [kodera2t]’s horn, check out his old project — an Arduino shoehorned into an SD card — or watch his alter-ego [Toshiro Kodera] give a serious talk about his day job, engineering radio-frequency meta-materials.
We’ve been watching the development of the ESP32 chip for the last year, but honestly we’ve been a little bit cautious to throw all of our friendly ESP8266s away just yet. Earlier this month, Espressif released version 2.0 of their IoT Development Framework (ESP-IDF), and if you haven’t been following along, you’ve missed a lot.
We last took a serious look at the IDF when the chips were brand-new, and the framework was still taking its first baby steps. There was no support for such niceties as I2C and such at the time, but you could get both cores up and running and the thing connected to the network. We wanted to test out the power-save modes, but that wasn’t implemented yet either. In short, we were watching the construction of a firmware skyscraper from day one, and only the foundation had been poured.
But what a difference eight months make! Look through the GitHub changes log for the release, and it’s a totally new ballgame. Not only are their drivers for I2C, I2S, SPI, the DAC and ADCs, etc, but there are working examples and documentation for all of the above. Naturally, there are a ton of bugfixes as well, especially in the complex WiFi and Bluetooth Low Energy stacks. There’s still work left to do, naturally, but Espressif seems to think that the framework is now mature enough that they’ve opened up their security bug bounty program on the chip. Time to get hacking!
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