Hi.
I have to thank the proposed code, having adapted to the ESP12 microcontroller. For which, I used the Pzem04 (TTL 5V). However, you need a converter from 5V to 3.3V.
#include <SoftwareSerial.h>
SoftwareSerial serial_(0, 2); // GPIO0 & GPIO2 RX, TX pins https://forum.arduino.cc/index.php?topic=492614.0
const unsigned int baudRate = 9600; // 115200 https://github.com/olehs/PZEM004T
float pzA=1, pzV=0, pzI=0, pzP=0, pzE=0;
byte reqVn[]={0xB0,0xC0,0xA8,0x01,0x01,0x00,0x1A}; // B0 C0 A8 01 01 00 1A : (Computer sends a request to read the voltage value) : Hex request to send to meter
byte reqIn[]={0xB1,0xC0,0xA8,0x01,0x01,0x00,0x1B}; // B1 C0 A8 01 01 00 1B : current value
byte reqPn[]={0xB2,0xC0,0xA8,0x01,0x01,0x00,0x1C}; // B2 C0 A8 01 01 00 1C : Active power
byte reqEn[]={0xB3,0xC0,0xA8,0x01,0x01,0x00,0x1D}; // B3 C0 A8 01 01 00 1D : Energy kWh
byte reqA[]={0xB4,0xC0,0xA8,0x01,0x01,0x00,0x1E}; // B4 C0 A8 01 01 00 1E : address
byte reqB[]={0xB5,0xC0,0xA8,0x01,0x01,0x00,0x1F}; //
byte reqC[]={0xB6,0xC0,0xA8,0x01,0x01,0x00,0x1A}; //
byte reqD[]={0xB7,0xC0,0xA8,0x01,0x01,0x00,0x1C}; //
byte reqE[]={0xB7,0xC0,0xA8,0x01,0x01,0x00,0x1B}; //
byte reqF[]={0xB7,0xC0,0xA8,0x01,0x01,0x00,0x1A}; //
// Set the module address Req B4 C0 A8 01 01 00 1E (Computer sends a request to set the address, the address is 192.168.1.1)
// Set the module address resp A4 00 00 00 00 00 A4 (Meter reply the address was successfully set)
// Set the power alarm threshold Req B5 C0 A8 01 01 14 33 (computer sends a request to set a power alarm threshold)
// Set the power alarm threshold Resp A5 00 00 00 00 00 A56 (Meter reply the power alarm threshold was successfully set)
const unsigned int max_sRx = 50; // how much serial data we expect before a newline
unsigned long mil = millis(); static unsigned int posRx=0; String s="", s1="";
int timer=185; // pode ir até 50ms, mas o ideal será 235ms(for 4units) or 190(for 5units) totalizando ~1s
byte tmp=5; // evitar erros a alta velocidade quando se aplica o Serial.println("");
unsigned long oldMil=mil+timer*4+500; byte sRx=0;
void setup() { delay(5000); // initialize serial:
Serial.begin(115200); // Serial.begin(9600); comunicação com/usb
serial_.begin(9600); // const unsigned int baudRate = 9600; comunicação com pzem
wdt_enable(WDTO_500MS); // WDTO_15MS WDTO_30MS WDTO_250MS WDTO_500MS WDTO_1S WDTO_8S watchdog
for (int i=0; i<=sizeof(reqA)-1; i++) { serial_.write(reqA[i]); s+=String(reqA[i],HEX)+":"; }
s+=" "; posRx=0; sAvailable(timer); pzA=convNum(s,164); s+=" Adr="+String(pzA); Serial.println(s); delay(tmp); s="";
if (pzA==164) {Serial.println(" PZEM04 exits "); } else Serial.println("PZEM04 no exits "); // 164(dec)=A4(hex)
}
float convNum(String st, byte adr) { // converter número
float n=0; byte i0=0, i1=0, i2=0, i3=0, i4=0, i5=0, i6=0; // year = str.substring(2, str.indexOf("/")).toInt();
st=st.substring(st.indexOf(";")-3,st.length()); i0=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 0)"+st+"["+i0+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i1=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 1)"+st+"["+i1+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i2=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 2)"+st+"["+i2+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i3=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 3)"+st+"["+i3+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i4=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 4)"+st+"["+i4+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i5=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 5)"+st+"["+i5+"]");
st=st.substring(st.indexOf(";")+1,st.length()); i6=st.substring(0,st.indexOf(";")).toInt(); // Serial.print(" 6)"+st+"["+i6+"]");
// Serial.print("<"+String(i0)+";"+String(i1)+";"+String(i2)+";"+String(i3)+";"+String(i4)+";"+String(i5)+";"+String(i6)+">");
if (i0==160) { n=i2+(float)i3/10; } // tension=list[2]+list[3]/10
else if (i0==161) { n=i2+(float)i3/100; } // current=list[2]+list[3]/100
else if (i0==162) { n=i1*256+i2; } // power=list[1]*256+list[2]
else if (i0==163) { n=i1*256*256+i2*256+i3; } // Energy=list[1]*256*256+list[2]*256+list[3]
else if (i0==164) { n=i1+i2+i3+i4+i5+i6; } // Energy=list[1]*256*256+list[2]*256+list[3]
return(n);
}
void sAvailable(int hora) { // serialAvailable
unsigned long mil_ = millis(); unsigned long milPre = mil_; String s0="", s1="";
while (mil_-milPre<hora) {
mil_=millis();
while (serial_.available() > 0) // When Software serial is available
{ sRx=serial_.read();
if (posRx < (max_sRx)) { s1+=String(sRx)+";"; posRx+=1; }
s0+=String(sRx,HEX)+":";
}
} s="tx="+s+" rx="+s0+"=["+s1+"] ";
}
void loop() { mil=millis(); delay(1); // usar delay nas funções para evitar erros
if (mil > oldMil) { s=""; oldMil=mil+timer*4+500; // min.total 2500=2.5s
for (int i=0; i<=sizeof(reqA)-1; i++) { serial_.write(reqA[i]); s+=String(reqA[i],HEX)+":"; }
s+=" "; posRx=0; sAvailable(timer); pzA=convNum(s,164); delay(tmp); s="";
if (pzA==164) { /* Serial.println(" PZEM04 exits "); */ } else Serial.println("PZEM04 no exits, verify connection. "); // 164(dec)=A4(hex)
for (int i=0; i<=sizeof(reqVn)-1; i++) { serial_.write(reqVn[i]); s+=String(reqVn[i],HEX)+":"; }
s+=" "; posRx=0; sAvailable(timer); pzV=convNum(s,160); s+=" Vn="+String(pzV); Serial.println(s); delay(tmp); s="";
for (int i=0; i<=sizeof(reqIn)-1; i++) { serial_.write(reqIn[i]); s+=String(reqIn[i],HEX)+":"; }
s+=""; posRx=0; sAvailable(timer); pzI=convNum(s,161); s+="In="+String(pzI); Serial.println(s); delay(tmp); s="";
for (int i=0; i<=sizeof(reqPn)-1; i++) { serial_.write(reqPn[i]); s+=String(reqPn[i],HEX)+":"; }
s+=""; posRx=0;sAvailable(timer); pzP=convNum(s,162); s+="Pn="+String(pzP); Serial.println(s); delay(tmp); s="";
for (int i=0; i<=sizeof(reqEn)-1; i++) { serial_.write(reqEn[i]); s+=String(reqEn[i],HEX)+":"; }
s+=""; posRx=0; sAvailable(timer); pzE=convNum(s,163); s+="En="+String(pzE); Serial.println(s); delay(tmp); s="";
// wdt_reset(); // reset o watchdog, ou seja se o programa craker e não ativar esse reset em 8segundos e o watchdog será ativado.
Serial.println(" time="+String(long(millis()-mil))+" "); delay(tmp);
}
}
It seems that the tension, current, power and energy are changed.
When you connect plug, having the following result:
report "lamp":
tx=b4:c0:a8:1:1:0:1e: rx=a4:0:0:0:0:0:a4:=[164;0;0;0;0;0;164;] Adr=164.00
PZEM04 exits
tx=b0:c0:a8:1:1:0:1a: rx=a0:0:ed:6:0:0:93:=[160;0;237;6;0;0;147;] Vn=237.60
tx=b1:c0:a8:1:1:0:1b: rx=a1:0:0:8:0:0:a9:=[161;0;0;8;0;0;169;] In=0.08
tx=b2:c0:a8:1:1:0:1c: rx=a2:0:c:0:0:0:ae:=[162;0;12;0;0;0;174;] Pn=12.00
tx=b3:c0:a8:1:1:0:1d: rx=a3:0:1:ad:0:0:51:=[163;0;1;173;0;0;81;] En=429.00
time=990
report "ventilation":
B0:C0:A8:1:1:0:1A: 160 0 230 70 0 0 150 Vn=160;0;230;7;0;0;150;
B1:C0:A8:1:1:0:1B: 161 0 7 5 0 0 142 In=161;0;7;50;0;0;142;
B2:C0:A8:1:1:0:1C: 162 0 6 174 0 0 150 Pn=162;0;6;174;0;0;150;
B3:C0:A8:1:1:0:1D: 163 0 0 70 0 0 152 En=163;0;0;70;0;0;152;
Vn=230+7/10=231.7V
In=7+50/100=7.50A
Pn=6256+174=1710W
En=0256256+0256+70=70kWh
When you disconetc the plug, report the next descrition:
PZEM04 no exits, verify connection.
tx=b0:c0:a8:1:1:0:1a: rx==[] Vn=0.00
tx=b1:c0:a8:1:1:0:1b: rx==[] In=0.00
tx=b2:c0:a8:1:1:0:1c: rx==[] Pn=0.00
tx=b3:c0:a8:1:1:0:1d: rx==[] En=0.00
