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I have RFID reader / writer hardware. It works over SPI so implementation should be platform independent. Arduino already has some libraries who are doing that. This one seems to be most popular: https://github.com/miguelbalboa/rfid But it would fulfill my requirments. My one should work with stm32 as well and be a part of my code infrastructure. So do not fall into sin of copy-paste and create new genuine library. But you can borrow some ideas out there.

I already have 3 esp8266 module and haven't already figured out how to work with them. I tried it in different mode, tried to flash it with newest tinker firmware but the best I got is some rubbish at serial output. This is so frustrating cause I was expected to have a lot of fun with them.
So I ordered another (and last one for me) module and going to try it. But it require some preliminarily soldering work.

Preamble:
As you (I mean me) know, my realization of decoder / transmitter flexible enough to use it not just with ir led / receiver. I tried to transmit signal over 433 MHz wireless module and figed out that 20 us (timeout I used for decoding / transmitting signal) is not enough for processing my decoder or transmitter class (I don't know what one exactly) and signal became distorted. After I increased timout to 40 us everything started to work almost perfect.
It looks like virtual inferitance gives a lot overhead in terms of microinstructions necessary for performing operations like calling function from virtual table

I have stm32 development board with whole bunch of feature. One of this is SDIO support.
So in this feture request I need:

• Implement platform indepenent API for working with sd cards. Since atmega has no SDIO capability and works with sd cards over SPI, it preferable to implement SDIO first. SPI implementation should be defered till I will have SPI SD card module.
• I need to some kind of file system or to use existing one (probably FAT). Surely FAT is high recomended. otherwise I should write drivers for my selfmade FS what will waste take a lot of time . So FAT only, do not even think of selfmade FS.

I have nokia 5110 display in my wardrobe lieing around without properly attention. In this issue I want to create class that able to control it over spi. Base feature only (put dot, turn off/on backlight and so on). For Fonts, bitmaps and other staff I will create separate issue when this will be done.

I have both RFM001 and RFM002 wireless modules lying around in my electronix box. Those are not mine and its about time to give it back to Serghei. Before I do that I want to create some kind of driver to work with Atmega' SPI.

Put metastate RCProtocolStateMachine, decoder related classes and data classes into separate file. Also think about suitable name. I'm going to reuse those classes not only for inferared communication but for wireless transmitter too. So there should be no RC related names.