There are plenty of radios you can buy that pick up MW and SW bands if that’s what you’re into. Or, you can follow [mircemk]’s example, and whip one up yourself instead. The build employs an ESP32 as ...

Learn how to repurpose your spare ESP32 boards into cost-effective presence detection sensors using the Tommy Sense ...

Back in the 1990s IBM had a pretty sizeable presence in the PC market, including its rather spiffy Aptiva series of PCs. Naturally their PCs had to feature heavily in another consumer-related thing ...

#define ADDR_MIN_DISTANCE 0 // 4 bytes cho float #define ADDR_MAX_DISTANCE 4 // 4 bytes cho float #define ADDR_LAST_DAY 8 // 1 byte cho ngày RTC_DS3231 rtc; SoftwareSerial simSerial(SIM_RX, SIM_TX); ...

This version uses millis() as a software clock. Time resets whenever the Arduino loses power or restarts.