6 layers43.9 × 118.2 mm

Sisu SSE-9
briskspirit/Sisu_SSE-9
Experimental six-layer LTE replacement mainboard for the Nokia 3210, built around RP2354B and Telit LE910C1-WWX.
296 parts19Unlicense
KiCad boards from 3 GitHub repositories tagged “rp2354”, the most starred first; open any of them in PCBKit.

briskspirit/Sisu_SSE-9
Experimental six-layer LTE replacement mainboard for the Nokia 3210, built around RP2354B and Telit LE910C1-WWX.

Jpwaters09/Macro-Pad
A 12-key macro pad with a configurable rotary encoder and OLED display, built around the RP2354A microcontroller and custom MicroPython firmware. Fully programmable through a web-based configurator.

lucasbaizer/pico-2v
RP2354A development board with switchable voltage, QSPI breakout, and more

briskspirit/Sisu_SSE-9
Experimental six-layer LTE replacement mainboard for the Nokia 3210, built around RP2354B and Telit LE910C1-WWX.