5V/7-28V Power Supply 8 Channel ESP8266 WIFI 8-way Relay Module ESP-12F Development Board Secondary

Note:?This product cannot be used directly, it is suitable for ESP8266 secondary development learning, beginners pay attention!

Feature:

Onboard mature and stable ESP-12F WiFi module, large capacity 4M Byte Flash

Power supply mode supports DC7-28V/5V

Onboard WIFI module RST reset button

ESP-12F supports the use of development tools such as Eclipse/Arduino lDE

Provide reference program under Arduin0 development environment

Onboard 8 5V relays, output switch signals, suitable for controlling loads whose working voltage is within AC 250V/DC30V

Onboard power indicator and relay indicator

Product specifications

Board size: 149*80mm

Weight: 140g

Package includes:

1 x?8-way Relay Module

Programming port: ESP8266`s GND, RX, TX, 5V are respectively connected to the external TTL serial port module GND, TX, RX, 5V, IO0 must 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.

GPIO lead port introduction: