The room smelled of coffee and warm plastic. On the table lay the laptop — its screen cracked like a dried riverbed — and, beside it, a USB stick labeled with a sliver of grease: hw-597-driver.bin.
After installing the driver, test the hardware: hw-597 driver
void loop() // Turn Relay 1 ON (Active LOW) digitalWrite(RELAY1, LOW); delay(1000); The room smelled of coffee and warm plastic
: Ensure the jumper on the module is set to the correct voltage (3.3V or 5V) required by your target device to avoid damage. 3. Verifying the Connection upload program to arduino pro min using USB TO TTL HW-597 Projects General Guidance. Arduino Forum hw-597 driver
// Initialize both relays OFF (HIGH = de-energized) digitalWrite(RELAY1, HIGH); digitalWrite(RELAY2, HIGH);