always getting error reading message with default example

[mcfly4711]

Hi I am using an Arduino Uno and tried to connect the PZEM-004-v30 RX -->D11 and TX --> D12. when I compiled and uploaded the default example I gets always the following message in the serial monitor. Error reading voltage Error reading current Error reading power Error reading energy Error reading frequency Error reading power factor

code which i have used:

include

/* 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) */ PZEM004Tv30 pzem(11, 12);

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

void loop() { float voltage = pzem.voltage(); if( !isnan(voltage) ){ Serial.print("Voltage: "); Serial.print(voltage); Serial.println("V"); } else { Serial.println("Error reading voltage"); }

float current = pzem.current();
if( !isnan(current) ){
    Serial.print("Current: "); Serial.print(current); Serial.println("A");
} else {
    Serial.println("Error reading current");
}

float power = pzem.power();
if( !isnan(power) ){
    Serial.print("Power: "); Serial.print(power); Serial.println("W");
} else {
    Serial.println("Error reading power");
}

float energy = pzem.energy();
if( !isnan(energy) ){
    Serial.print("Energy: "); Serial.print(energy,3); Serial.println("kWh");
} else {
    Serial.println("Error reading energy");
}

float frequency = pzem.frequency();
if( !isnan(frequency) ){
    Serial.print("Frequency: "); Serial.print(frequency, 1); Serial.println("Hz");
} else {
    Serial.println("Error reading frequency");
}

float pf = pzem.pf();
if( !isnan(pf) ){
    Serial.print("PF: "); Serial.println(pf);
} else {
    Serial.println("Error reading power factor");
}

Serial.println();
delay(2000);

}

any Idea what I am doing wrong?

[mandulaj]

Hey, did you make sure to connect the module to the AC? It is actually not powered by the 5V you give it from the Arduino. It uses the AC to power itself. The 5V only power the opto-couplers which isolate your Arduino form the mains....

[mcfly4711]

Thx for your email.Yes Ac 230V is connected but not CT.It seams for me that there is no signal pn RX port. No Led flashing like on TX.Am 21.04.2020 14:15 schrieb Jakub Mandula notifications@github.com: Hey, did you make sure to connect the module to the AC? It is actually not powered by the 5V you give it from the Arduino. It uses the AC to power itself. The 5V only power the opto-couplers which isolate your Arduino form the mains....

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[mandulaj]

Hmm. that is strange. The CT not connected should not be causing any issues (you will just read 0 current).

Could you try this, swap the RX and TX wires. Maybe you have them the other way around

[mcfly4711]

I will test in the evening:-)Am 21.04.2020 15:44 schrieb Jakub Mandula notifications@github.com: Hmm. that is strange. The CT not connected should not be causing any issues (you will just read 0 current). Could you try this, swap the RX and TX wires. Maybe you have them the other way around

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[mcfly4711]

No changes. I checked connection snd changed TX and RX.  But it was wired correctly.Am 21.04.2020 15:49 schrieb ralf.kallfass@my-webspace.de:I will test in the evening:-)Am 21.04.2020 15:44 schrieb Jakub Mandula notifications@github.com: Hmm. that is strange. The CT not connected should not be causing any issues (you will just read 0 current). Could you try this, swap the RX and TX wires. Maybe you have them the other way around

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[ilomon10]

Any update?

[mcfly4711]

Flapping connection :-( thx for your support

[Jzstay]

did you resolve it?

[Jemeeeeer]

im having the exact same problem. any update on how you resolved the issue?

[Jemeeeeer]

Flapping connection :-( thx for your support

what was the issue?

[mcfly4711]

No I could not fix it -------- Ursprüngliche Nachricht --------Von: Jemeeeeer @.> Datum: 02.04.24 06:02 (GMT+01:00) An: mandulaj/PZEM-004T-v30 @.> Cc: mcfly4711 @.>, State change @.> Betreff: Re: [mandulaj/PZEM-004T-v30] always getting error reading message with default example (#23)

Flapping connection :-( thx for your support

what was the issue?

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