Meter PZEM-004 + ESP8266 & Node-RED & Modbus TCP/IP

Simple Test Meter PZEM-004 & ESP8266 Platform IoT Node-RED Dashboard Modbus TCP/IP

Connections

Note: The PZEM-004 meter requires an adaptation to 3.3v communication, more information references below.

Arduino IDE Code

The routine created in Arduino IDE, ESP8266performs the reading of the meter PZEM-004 through the serial port, from previous tests with Modbus TCP / IP a routine was created cut for sending and receiving of Holding Registers.

4 variables have been defined in 4 Holding Registers:

• empty = Holding Register[0].

• Instantaneous voltage = Holding Register[1].

• Instant current = Holding Register[2].

• Instant power = Holding Register[3].

• Accumulated power = Holding Register[4].

Quick solution to shipment of Float in Int

The values of the meter are floating type, the Holding Registers are 16-bit Integers, in this case by practicality simply multiplying by 10 we perform the sending of the value, in next tests we will carry out the shipment in 2 integers of 16 bits.

Complete Documentation and downloads:

http://pdacontrolen.com/meter-pzem-004-esp8266-platform-iot-node-red-modbus-tcp-ip/

Documentacion Completa y descargas:

http://pdacontroles.com/medidor-pzem-004-esp8266-plataforma-iot-node-red-modbus-tcpip/