Hiletgo esp8266 arduino sd9/12/2023 ![]() ![]() These SPIs also support the following general-purpose SPI features: SPI Pins NodeMCU/ESP8266 features two SPIs (SPI and HSPI) in slave and master modes.However, UART1 (TXD1 pin) features only data transmit signal so, it is usually used for printing log. UART0 (TXD0, RXD0, RST0 & CTS0 pins) can be used for communication. UART Pins NodeMCU/ESP8266 has 2 UART interfaces (UART0 and UART1) which provide asynchronous communication (RS232 and RS485), and can communicate at up to 4.5 Mbps. ![]() However, they cannot be implemented at the same time. Testing power supply voltage of VDD3P3 pin and testing input voltage of TOUT pin. The two functions can be implemented using ADC.
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