
Display and comms
LeHack/SPSP
Particulate matter pollution monitoring system (:poland: System Pomiaru Stężenia Pyłu w powietrzu)
Boards in 11 GitHub repositories, designed in KiCad, that use the RN4020-V/RM by Microchip Technology (7.5dBm OTA (Over-The-Air) upgrade、Encryption function SPI、UART、AIO、PIO SMD Bluetooth Modules ROHS). See how each wires it, with its parts, size, README and files; the RN4020-V/RM’s symbol, footprint and pinout are on its own page.

LeHack/SPSP
Particulate matter pollution monitoring system (:poland: System Pomiaru Stężenia Pyłu w powietrzu)


takjn/GRRNble
DIY Smartwatch using Renesas RL78/G13 MCU and RN4020 ble module with Android companion app.

Nicowars/poncho-bluetooth
Repositorio para el desarrollo de un Poncho que implementa Bluetooth para la EDU-CIAA






