{"product_id":"dc7-28v-5v-power-supply-esp8266-wifi-8-channel-30a-relay-module-esp-12f-development-board","title":"DC7-28V \/ 5V Power Supply ESP8266 WiFi 8 Channel 30A Relay Module ESP-12F Development Board","description":"\u003cdiv id=\"specification\"\u003e\u003c\/div\u003e\u003cdiv id=\"specification_end\"\u003e\u003c\/div\u003e\u003cp\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003eDescription:\u003c\/span\u003e\u003c\/b\u003e \u003cbr\u003eThe ESP8266 eight way 30A relay development board is equipped with ESP-12F wifi module, with all I \/ O ports led out, and supports DC7-28V \/ 5V power supply mode. Provide Arduinodevelopment environment reference code, which is suitable for ESP8266 secondary development and learning, smart home wireless control and other occasions.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003eFeatures:\u003c\/span\u003e\u003c\/b\u003e \u003cbr\u003e1. Onboard mature and stable ESP-12F WiFi module with large capacity of 4M byte flash\u003cbr\u003e2. The I \/ O port and UART program download port of WiFi module are all led out to facilitate secondary development; 3. The power supply mode supports dc7-28v \/ 5V;\u003cbr\u003e4. On board WiFi module RST reset key and a programmable key;\u003cbr\u003e6. On board 8-way 5V \/ 30A relay, which outputs switching signal and is suitable for controlling loads with working voltage within AC 250V \/ DC30V\u003cbr\u003e7. On board power indicator, relay indicator and led of one module;\u003cbr\u003e8. Two on-board shift registers 74HC595 control the relay switch.\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003ePackage Include:\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e1x Relay Module Board\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWriting port: \u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eGND, Rx, TX and 5V of esp8266 are respectively connected to GND of external TTL serial port module, TX, Rx, 5V, IO0 needs to be connected with GND when downloading, and then disconnect the connection between IO0 and GND after downloading; Relay output:\u003cbr\u003e\u003cb\u003eNC:\u003c\/b\u003e normally closed end, short circuited with com before the relay is pulled in \u0026amp; suspended after it is pulled in; \u003cbr\u003e\u003cb\u003eCOM:\u003c\/b\u003e public end;\u003cbr\u003e\u003cb\u003eNo:\u003c\/b\u003e normally open, the relay is suspended before closing, and is short circuited with com after closing.\u003c\/p\u003e","brand":"LinkMejor","offers":[{"title":"Default Title","offer_id":49120180633825,"sku":"BG-2036872","price":19.99,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0853\/9317\/8849\/files\/9bc864a6-419c-4dff-98f1-66dc2c305e7e.jpg?v=1789396519","url":"https:\/\/ontproduct.com\/products\/dc7-28v-5v-power-supply-esp8266-wifi-8-channel-30a-relay-module-esp-12f-development-board","provider":"IvySource","version":"1.0","type":"link"}