eBay

I. Overview
The ESP8266 eight-way relay development board is equipped with ESP-12F WiFi module and supports DC7-28V/5V power supply. 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, large capacity 4M Byte Flash;
2. The power supply mode supports DC7-28V/5V;
3. The onboard WiFi module RST reset button;
4. ESP-12F supports the use of Eclipse/Arduino IDE and other development tools, and provides reference programs under the Arduino development environment;
5. There are 8 5V relays on board, outputting switch signals, suitable for controlling loads whose working voltage is within AC 250V/DC30V;
6. Onboard power indicator and relay indicator.

III. Hardware introduction and description:
1. Board size: 148*79.8mm
Weight: 140g

Programming port: ESP8266's GND, RX, TX, 5V are respectively connected to the GND, TX, RX, 5V of the external TTL serial port module. IO0 needs to be connected to GND when downloading, and then disconnect the connection between IO0 and GND after the download is complete;

Relay output:

NC: Normally closed, the relay is short-connected with COM before the pull-in, and hangs in the air after pull-in;

COM: public end;

NO: Normally open end, the relay is suspended before being closed, and shorted to COM after being closed

3. Introduction to GPIO port


1	ADC	A/D conversion result. Input voltage range: 0～1V, value range: 0～1024
2	IO2	GPIO2; UART1_TXD
	TXD	UART0_TXD; GPIO1
3	RXD	UART0_RXD; GPIO3
4	GND	GND
5	5V	5V Power

Package Include:

1x DC 5V DC 7-28V ESP8266 WIFI 8 Channel Relay Module ESP-12F Development Board

Payment
Returns
Shipping

Payment

We only accept payment through Paypal.
Items will go to post within 1-2 business days after payment confirmed.

Returns

If you can't receive the product within 2 months (60 days), please contact with us,we promise to payback 100% of your money.
We ensure our products work normally before post.If the products is broken before arrival to you,all you should do is taking a photo to show us our broken product.We promise to payback 100% of your money.

Shipping

1. We ship to Worldwide.
2. We only ship to confirmed PAYPAL address; your PAYPAL address must match your Shipping address.
3. Any non-received items caused by invalid address registered on PayPal are not in our full refund or replacement policy. Shipping fee has including the local handing and packaging fee.
4. All the items will be shipping within 1-2 working days after receiving the payment, except some holidays.
5. We will not be responsible for any custom delay or tax, because transit time is highly depended and provided by postal Service.
6. If you have any problem, please contact us via message, we will reply message within 1-2 working days, please wait for patient.