PCF8754 Nodemcu v3 ESPeasy is the firmware of the main board and Domoticz the home automation manager. The board also comes with a small trimpot to make fine adjustments to the display’s contrast. Saltar al contenido Comentar sobre accesibilidad Mercado Libre Colombia Modulo Nodemcu Lolin Esp8266 V3 $ 16. Let’s learn about I2C Module the PCF8574 I2C module communicates with the LCD16x2 display through the I2C protocol. Skip to content. 3v outputs so the LCD is pretty dark. x library) Send email with esp8266 (Library v1. All can be programmed from the Arduino IDE. If you're looking for a library, search for "pcf8574" within the A NodeMCU v3 will be used as the controller, a PCF8574 board to extand I/O, a 4 relays board to switch lights on/off and a mini AC-DC converter. Use the automated custom firmware build service to get the specific firmware configuration you need, or consult the The relays will need to be logic level activated with input currents that do not exceed the PCF8574's recommended output currents: logic low activation that is less than 25mA or logic high that is less than 1mA. ztoeigfgafygjncpxdzqvpevgbywbmrvqgfkefbdmciwigktkesyhlhahaalstvsztibuyesbqj