Wisblock Starter kit 19007+rak4630 rx1 and tx1 Pin Number in Arduino

WisBlock
#1

Newbie here.

I have purchased the Wisblock starter kit RAK19007+rak4630 Arduino and I want to use the TX1 and RX1 to connect my energy meter device that transmit data thru TTL.

I am able to read the data from the energy device using ESP 32/8266 nodemcu as the pin no is straight forward where to put the RX and TX.
My question is, is the RX1 and TX1 from RAK19007 under J10 headers available to use? if yes, what would be the PIN no definition in arduino?

Here is the sample code which I am using in exp32/8266

#include <PZEM004Tv30.h>
#include <SoftwareSerial.h>

int counter =0;

/* Use software serial for the PZEM

 * Pin 11 Rx (Connects to the Tx pin on the PZEM)
 * Pin 12 Tx (Connects to the Rx pin on the PZEM)
*/

#if !defined(PZEM_RX_PIN) && !defined(PZEM_TX_PIN)

#define PZEM_RX_PIN D11
#define PZEM_TX_PIN D12

#endif

SoftwareSerial pzemSWSerial(PZEM_RX_PIN, PZEM_TX_PIN);

PZEM004Tv30 pzem;

void setup() {
  Serial.begin(115200);
  pzem = PZEM004Tv30(pzemSWSerial);
  }

void loop() {       
    Serial.print("Custom Address:");
    Serial.println(pzem.readAddress(), HEX);
    // Read the data from the sensor
    float voltage = pzem.voltage();
    float current = pzem.current();
    float power = pzem.power();
    float energy = pzem.energy();
    float frequency = pzem.frequency();
    float pf = pzem.pf();

    // Check if the data is valid

    if(isnan(voltage)){ 
        Serial.println("Error reading voltage");
    } else if (isnan(cur rent)) {
        Serial.println("Error reading current");
    } else if (isnan(power)) {
        Serial.println("Error reading power");
    } else if (isnan(energy)) {
        Serial.println("Error reading energy");
    } else if (isnan(frequency)) {
        Serial.println("Error reading frequency");
    } else if (isnan(pf)) {
        Serial.println("Error reading power factor");
    } else {
        // Print the values to the Serial console
        Serial.print("Voltage: ");      Serial.print(voltage);      Serial.println("V");
        Serial.print("Current: ");      Serial.print(current);      Serial.println("A");
        Serial.print("Power: ");        Serial.print(power);        Serial.println("W");
        Serial.print("Energy: ");       Serial.print(energy,3);     Serial.println("kWh");
        Serial.print("Frequency: ");    Serial.print(frequency, 1); Serial.println("Hz");
        Serial.print("PF: ");           Serial.println(pf);
    }
    Serial.println();
    delay(1000);
}
#2

Welcome to the forum @jepongski

First question, why are you using software serial?

You can use RX1/TX1 through Serial1:

#include <PZEM004Tv30.h>
PZEM004Tv30 pzem(Serial1);

void setup() {
   Serial.begin(115200);
   Serial1.begin(9600);
}

void loop() {       
    Serial.print("Custom Address:");
    Serial.println(pzem.readAddress(), HEX);
    // Read the data from the sensor
    float voltage = pzem.voltage();
    float current = pzem.current();
    float power = pzem.power();
    float energy = pzem.energy();
    float frequency = pzem.frequency();
    float pf = pzem.pf();

    // ..........................................
}

If you insist to use Software Serial, you can check the pin numbers in the variant.h file of the RAK4631:

/*
 * Serial interfaces
 */
// TXD1 RXD1 on Base Board
#define PIN_SERIAL1_RX (15)
#define PIN_SERIAL1_TX (16)

// TXD0 RXD0 on Base Board
#define PIN_SERIAL2_RX (19)
#define PIN_SERIAL2_TX (20)
#3

Thank you for the reply,

I tried to use the serial1 however after compiling, the serial port device is not being detected by the PC.
i have to re-flash the mcu in order to detect it.

#4

No guarantee that my example code works. I don’t know this library nor did I ever use it.

I saw that in the library examples is an example how to use HW serial.