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For SiLabs Si4xxx (e.g., Si4463) chips there is also this wonderful repo:

https://github.com/astuder/Inside-EZRadioPRO

There are basically four main OEMs for SubGHz radios (hobby projects): - Analog Devices (ADF7xxx) - SiLabs (Si4xxxx) - Semtech (SX1xxx) - Texas Instruments (CCxxxx)

If i remember correctly the Analog Devices and the Semtech radios share the same internal core (blackfin?). Please correct me if i am wrong. For the Semtech and ADF702x there are firmware patches and/or ROMs available. The most interesting part would be to unlock the internal test mode which some of those chips have…

discuss

GeorgeTirebiter|1 year ago

Which open source stacks work with Infineon CYW43439 (used on Pico w and Pico 2W)? I know about BTstack, but apparently NimBLE is not ported to this chip.

I'm also curious, of all the available BLE chips, which one has the "most sane" development environment? I had the misfortune of using the SiLabs BLE chips, and it seems like the Dev Environment was meant for Web dudes or something -- it seemed very foreign to me, an embedded guy. It was like 5 layers to go from their SDK down to the machine instruction that would set the value of a GPIO pin hi or lo. Confused documentation, spread out over dozens of not-related sections, weird configuration wizards, etc. Now, the Hardware seemed just fine, but gosh, the Dev Environment?

I've heard good things about Nordic's environment, but haven't used it. I also know nothing about TI's or AD's.

Opinions appreciated!

zh3|1 year ago

The older Nordic SDK wasn't too bad (once you get over the learning curve). Trying to start a project from scratch is challenging though, so much easier to pick the closest example, get that going and modify from there.

However, they've deprecated the old SDK [0] in favour of Zephyr [1] and quite a number of people struggle with it (check the forums and general internet). I have less experience with Zephyr, but both of them use a lot of python support tools which seem to suffer from versioning amd compatibility problems (even trying to keep a stable platform has been difficult here, what works one time doesn't work a few months later). YMMV.

[0] https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/ind...

[1] https://www.zephyrproject.org/