When the WiFi module and the mobile phone are running on the router at the same time, the transmission distance depends on the signal strength of the router. Use Smartcongig technology to complete the account and password configuration on the mobile phone APP ESP-01 WiFi module, and configure the user name and password memory function. Onboard 12V, 10A // 250V AC 10A // 30V DC relay, which can be activated continuously for 100,000 times, with diode discharge protection, and short response time. Single board mode selection and real-time working status indication. Reserve UART debugging interface and STM8 SWIM program download interface., Weight: 0.13337966851 Pounds, Manufacturer: Ehwisbe