Raspberry Pi Pico (RP2040) based board with integrated RTC and SD Card reader.
iLabs Challenger RP2040 SD/RTC – Elektor
Challenger RP2040 SD/RTC - iLabs Electronics
Challenger RP2040 WiFi (Chip Antenna)
Downloads
Challenger RP2040 LTE MkII
iLabs Challenger RP2040 SD/RTC – Elektor
Challenger RP2040 WiFi from Invector Labs on Tindie
Challenger RP2040 SD/RTC
Challenger RP2040 SD/RTC
iLabs Challenger RP2040 SD/RTC – Elektor