Description

ESP8266 Wireless WIFI 4Channel Relay Module Development Board AC/DC Power Supply 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. Dimensions : Interface Description Burning port. ESP8266 GND, RX, TX, 5V are connected to the external TTL serial module GND, TX, RX, 5V, IO0 and GND need to be connected to the download, download is complete and then disconnect the connection between IO0 and GND; relay outputs: NC: Normally Closed, shorted before the relay is absorbed with the COM, after the absorption of the empty; COM: Common; NO: Normally Open, the relay is shorted with the COM before the absorption. NC: Normally closed terminal, shorted to COM before the relay is engaged, shorted to COM after the relay is engaged. Package Include: 1x AC/DC ESP8266 WIFI 4 Channels Relay Module ESP-12F Development Board Shipping Feedback Contact us Return Policy Shipping Domestic We believe you need to get your purchases as quick as possible. As a general rule your item will be shipped within 24 hours of you purchasing it. We pack and post from Tuesday to Sunday (Mondays we are closed) but definitely get all our mail off to the post office first thing Monday morning for you. Mail gets picked up at 12pm so chances are if you buy before lunchtime your item will leave the same day. International Same as above but understand that depending on what part of the world you are from it does take a little longer to send, delivery can be from 7-15 working days. Also other factors to take into consideration are quarantine and customs regulations in your country. It is also a consideration that customs duties and GST/VAT may be payable at the buyers expense. Combined Postage (for items with shipping charges): We are more than happy to combine postage, just use the Buy it Now function in eBay (but DO NOT PAY after purchasing each item) to buy all the products you need, when you have finished request a combined invoice, we will base the shipping cost on the size, weight and your location. Feedback * When you satisfied with our product and services please leave us positive feedback. * If you have got the package, please confirm " Delivery on time " For us. * If a problem occurs, contact us immediately with any email request. * Just contact us using the " Ask the seller a question " link on eBay. Your Satisfaction is our Priority. Our goal is to make all our customers as happy as possible while shopping with us. Contact us For anything problem about product, price, shipping or order status, pleasecontact us via eBay message.Just contact us using the " Ask the seller a question " link on eBay. We expect positive feedback and 5 scores DSR from you. Return Policy We believe our items are so outstanding. We are convinced you will be happy with your Purchase. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund to you after the returned item arrived at our warehouse. Please include your eBay ID and item number with any email requests.