Burning and writing port: GND, Rx, TX and 3.3V of esp8266 are respectively connected with GND, TX, RX and 3.3V of external TTL serial port module. IO0 needs to be connected with GND when downloading, and then disconnect IO0 and GND after downloading.
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The 5V dual WiFi relay module uses ESP-01 as the WiFi module and is compatible with 8 bit MCU chip. Onboard ESP-01 WiFi modules and high performance microprocessor STM8S103. reserved UART debugging interface and STM8 of NUOTATA download interface program.
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We are in endeavor to provide you best service and keep you a happy buying experience from us. No one is EVER ignored! Interfaces: SDIO 1.1/2.0, SPI, UART.
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Specification (optional) : ESP8266 Adapter, ESP-01 (black), ESP-01 (blue). Stable Performance: The adapter board features a CH340 chip that ensures stable performance and excellent compatibility with Windows systems.
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With ESP8266 Wifi module,4-layers board design. 220V 10A relay, one normally open, one normally closed. Onboard Relay:5V,10A/250V AC 10A/30V DC relay. Relay 1 [#8467]. Relay 2 [#8468]. One way optocoupler isolation input, TVS input protection.
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Onboard mature and stable ESP-12F WIFI module, large capacity 4M BYTE FLASH;. Onboard WIFI module RST reset button;. Onboard power indicator, 1 programmable LED and relay indicator. On-board power indicator, 1 programmable LED and relay indicator.
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Versatile I/O Options: With 11 digital I/O pins and 1 ADC pin (supporting input from 0 to 3.3V), the D1 mini nodemcu esp8266 wifi iot board provides flexible options for connecting various sensors and components, enhancing its utility for a wide range of applications.
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The GND, RX, TX, and 5V of ESP8266 are connected to the GND, TX, RX, and 5V of the external TTL serial port module respectively. The IO0 should be connected to the GND when the download is complete.
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