Wow, I’ve been looking at some of these boards for a while! Especially The SparkFun Edge. A couple IoT cores: Ibex and [CV32E40P] were made by https://www.pulp-platform.org/ -There are some products made with it https://open-isa.org/
Edit: another one: https://www.seeedstudio.com/Sipeed-MAix-BiT-for-RISC-V-AI-IoT-p-2872.html and https://www.seeedstudio.com/Sipeed-MAix-GO-Suit-for-RISC-V-AI-IoT-p-2874.html
This should also be an interesting board: https://www.raspberrypi.org/blog/raspberry-pi-silicon-pico-now-on-sale/
A post was split to a new topic: Dual-Core support
For a board with an unusual MCU, there is the QuickFeather that comes with a QuickLogic EOS S3 MCU/FPGA combo chip.
The MCU is also available on a tiny board.
A post was split to a new topic: LED strips with the BL602
A bit out of our usual use case, but maybe providing a challenge to enrich our feature set: An open hardware SAMD21-based game console with VGA output.
I came across some more 802.15.4 implementations:
Another company that’s new to me, also there is no way to publicly buy those chips or the SDK, so not sure how useful that is. You can request samples though.
Now this is a USB dongle based on NXPs JN5189 MCU. This has the advantage that you can actually buy it ($29) and it has proper documentation.
a single MCU is less than $2 for the JN5188HN (320k Flash/88k RAM), so this could be used for cheap nodes.
2 posts were split to a new topic: NXP OM15080 SDK research
You linked to ESP32-S2 boards though. I have a hard time finding any ESP32-C3 board.
Oh yes, you are right! The shielding looked different, so I thought they must be new (and they came up when searching for ESP32-C3, thanks fuzzy search…)
I’ll remove that post to avoid confusion.
I was gathering info about multi Core MCUs and discovered that Rockchip, better known for their multimedia application processors, also has a line of MCUs. Those seem to be focused on audio processing, RKNanoC is a single Cortex M3, but there is also the Dual Core RKNanoD:
On a quick glance I found no public documentation though. It’s also a rather old board / MCU, so this is more for curiosity’s sake.
See #16036 for my PR, including support for the seeedstudio-gd32 development board
Also 2nd the Sparkfun boards- the Edge is just one of the Apollo3 based boards. Some seem to have UART available. I bought an Artemis Nano for $14.95. These are all the boards: https://www.sparkfun.com/search/results?term=apollo3 +A La Carte could be used for designing boards with custom components. https://alc.sparkfun.com/ They recently released a LoRa board, but I plan to use the Nano before a larger one.
RISC-V keeps on delivering on it’s promise of diversifying the chip market.
Bluetrum has announced the AB5301A MCU designed for audio players.
It’s available on the AB32VG1 board and has support in RT-Thread.
No pricing or availability information yet.
This might be a low hanging fruit based on EFR32MG21:
itead, $6.99
I intent to assign porting RIOT to the RPi Pico as a software project. So if anyone is interested in this and willing to join forces, give me a ping.
There is also now an Adafruit Feather wtih the RPi Pico chip: The Feather RP2040. Pretty affordable compared to other Feathers too.
Aaaaand it’s out of stock, wonder how long that took
From Europe it makes more sense to order via Mouser anyways 
I add the nrf53 here, due to an issue we have on this forum.. The nRF5340 DK is a development board for the MCU.
