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0104110000000897
New product
The ESP8266 Wifi module is a low cost and highly integrated chip that can easily bring your projects to the internet of things.
See description for more details about the product.
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The ESP8266 module can be integrated with sensors and other devices because it features a very powerful on-board processor and high storage capabilities.
This module is ideal for rapid development of your projects and prototypes.
Absolut Genial!
Bun la de toate,
pubSub client pt nodeRed si MQTT
4 pini Digitali
RX/TX pot fi folositi si ca pini digitali
Over the Air Update disponibil, nu ai nevoie de cabluri.
Mic si puternic
Foarte util pentru automatizari.
Pro:
- pretul
- poate fi folosit si "stand alone".
- ofera 2 pini GPIO
- firmware-ul poate fi schimbat. (eu am pus unul personalizat de NodeMCU)
Contra:
- in timpul boot-ului GPIO 0 si 2 trebuie sa fie neconectati sau pull-ul... ceea ce face destul de grea folosirea lor ca iesire.
- in cazul in care se foloseste o rezistenta de pull-ul modulul de cam incalzeste
Atentie!
Daca la alimentarea la 3,3V (cu regulator 3v3 sau cu solutia de divizor de mai sus) chipul ESP8266 se incalzeste puternic atunci este cazul sa reducem alimentarea la 2,5V si putem pune regulator de 2v5 + translatoare de nivel 2v5 ...3v3 ..5V (solutia pretentioasa) sau rezistente de 1k pe liniile de RX/TX etc.
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