The current release of the Raduino board sold by HF Signals only supports the "classic" Arduino nano. This device only has 32kb (actually 30kb with bootloader) of flash, 2kb of sram, and runs at 16mhz. The Classic Nano does have 1kb of EEPROM and is 5V signal compatible which prevents a "drop in replacement" by the new generation of Nano compatible footprint processors.
The constraint of the "classic" Nano has limited the amount of features that can be implement in firmware. In fact, the popular firmware by Ian Lee (KD8CEC) barely squeezes into the flash memory of the Nano and any new features require tradeoffs of what features are going to be eliminated. It also caused KD8CEC to make some architectural decisions where the UX is implemented on the Nextion screen using some features (i.e. timers) that are difficult to extend and debug. Although I have not looked at the V6 touchscreen software provided by HF Signals, I can reasonably believe that they face a similar contraint as well anybody that wants to hack the software.
The purpose of these boards, are to remove this contraint. Currently the following chips are supported:
- Nano
- Nano Every
- Arduino BLE
- Arduino IOT
- Arduino RP2040
- Teensy 4.0
- Raspberry Pi Pico
These boards support both V5 and V6. V6 boards require a larger header and the installation of a resister.
73 Mark AJ6CU