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Home Arduino Module Sensor Chips About Us Item Description Single Channel: Reference description: I. Overview The ESP8266 single-channel relay development board is equipped with ESP-12F WiFi module, all I/O ports are led out, and it supports AC90-250V/DC7-12V/USB 5V and other power supply methods. Provide Arduino development environment reference code, suitable for ESP8266 secondary development learning, smart home wireless control and other occasions. II. Features 1. On-board mature and stable ESP-12F WiFi module with large capacity 4M Byte Flash; 2. The I/O port of the WiFi module and the UART program download port are all led out to facilitate secondary development; 3. Onboard AC-DC switching power supply module, power supply mode supports AC90-250V/DC7-12V/USB5V; 4. The onboard WiFi module RST reset button; 5. ESP-12F supports development tools such as Eclipse/Arduino IDE, and provides reference programs under the Arduino development environment; 6. Onboard 1 5V relay, output switch signal, suitable for controlling loads with working voltage within AC 250V/DC30V; 7. On-board power indicator, 1 programmable LED and relay indicator. III. hardware introduction and description 1. Board size: 80*50mm Weight: 36g 2. Interface introduction 1. L, N: AC90-250V power supply; 2. AC90-250V to DC5V switching power supply (do not touch it directly with your hands when using AC power supply!!!); 3. VCC, GND: DC7-12V power supply; 4. Micro USB: DC5V USB power supply; Note: AC90-250V, DC7-12V, DC5V USB can choose one of three power supply modes. 5. 6X6mm button: ESP8266 reset button; 6. UART program download port: ESP8266's GND, RX, TX, 5V are respectively connected to the GND, TX, RX, 5V of the external TTL serial port module. IO0 must be connected to GND when downloading, and then disconnect the IO0 and GND after download connection; 7. GPIO pin header leads to the port; 8. Relay output terminal: NC: Normally closed, the relay is short-connected with COM before it is closed, and it is suspended after being closed; COM: public end; NO: Normally open end, the relay is suspended before being closed, and shorted to COM after being closed. 9. Power indicator LED; 10. Programmable LED; 11. Relay indicator LED: lights up when it is closed. 3. Introduction to GPIO port Number Name Function Description Number Name Function Description 1 GND Power ground 13 IO10 GPIO10 2 Relay The relay drive port is driven by IO5 by default. If you want to use other I/O to drive the relay, you can remove R14, and then connect the I/O of the drive relay to this Relay pin 14 MISO Slave output host input 3 IO2 GPIO2; UART1_TXD 15 IO13 GPIO13; HSPI_MOSI; UART0_CTS 4 IO4 GPIO4 16 IO14 GPIO14; HSPI_CLK 5 RX UART0_RXD; GPIO3 17 ADC A/D conversion result. Input voltage range: 0～1V, value range: 0～1024 6 3V3 3.3V power supply 18 3V3 3.3V power supply 7 SCLK Clock 19 MOSI Host output and slave input 8 IO15 GPIO15; MTDO; HSPICS; UART0_RTS 20 IO9 GPIO9 9 IO0 GPIO0 21 CS0 Chip Select 10 IO5 GPIO5 22 IO12 GPIO12; HSPI_MISO 11 TX UART0_TXD; GPIO1 23 IO16 GPIO16 12 5V 5V power supply 24 GND Power ground IV. Package Include: 1 x AC/DC power ESP8266 WIFI single-channel relay module ESP-12F development board 2 Channel Function: 1. Onboard mature and stable ESP-12F WIFI module, large capacity 4M BYTE FLASH; 2. The I/O port of the WIFI module and the UART program download port are all led out to facilitate secondary development; 3. Onboard WIFI module RST reset button; 4. ESP-12F supports the use of development tools such as ECLIPSE/ARDUINO IDE, and provides ARDUINO Reference program in the development environment; 5. Onboard 2 5V relays, output switch signal, suitable for controlling the working voltage of AC Load within 250V/DC30V; 6. Onboard power indicator, 1 programmable LED and relay indicator. Package: 1x 5V Power Supply ESP8266 WIFI Dual Channel Relay Module ESP-12F Development Doard 4 Channel Function pending : 1. Onboard mature and stable ESP-12F WIFI module, large capacity 4M BYTE FLASH; 2. The I/O port of the WIFI module and the UART program download port are all led out to facilitate secondary development; 3. Onboard AC-DC switching power supply module, power supply mode supports AC90-250V/DC7-30V/5v; 4. Onboard WIFI module RST reset button; 5. ESP-12F supports the use of development tools such as ECLIPSE/ARDUINO IDE, and provides ARDUINO Reference program in the development environment; 6. Onboard 4 5V relays, output switch signal, suitable for controlling the working voltage of AC Load within 250V/Dc30V; 7. On-board power indicator, 1 programmable LED and relay indicator. Package Include: 1x AC/DC ESP8266 WIFI 4 Channels Relay Module ESP-12F Development Board Payment Shipping Refund Payment We accept PayPal only. But we only Accept your Ebay Address ,Please Make sure it's 100% right. Payment must be received in 5 business days of auction closing. Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order. Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched. Shipping Fill your shipping info Refund All package need to wait 30 days (US only need 7-10 days) , Please take care it.Less than 30 days,we can't take a refund . If the item is defect when you receive it or you are not satisfied with it, please return it within 14 days for a replacement or money back. But the items must be back in factory condition. Please contact us and double check the return address before you return it. 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