PZEM-004T RX TX Ports Swapped

[nunofmds]

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Describe the bug A clear and concise description of what the bug is.

After upgrade from 6.3.0 to 6.4.0 I had to change TX and RX ports on the config without changing nothing at hardware level.

On 6.3.0 I had:

On 6.4.0 I changed to:

Also, make sure these boxes are checked [x] before submitting your issue - Thank you!

• [ X ] Searched the problem in issues and in the wiki
• [ X ] Hardware used : NodeMCU ESP8266 ESP-12E for arduino CP2102
• [ ] Development/Compiler/Upload tools used :
• [ ] If a pre-compiled release or development binary was used, which one? :
• [ X ] You have tried latest release or development binaries? :
• [ ] Provide the output of commandstatus 0 :

  
  00:13:59 MQT: stat/sonoff_power_meter/STATUS = {"Status":{"Module":18,"FriendlyName":["Sonoff Power Meter"],"Topic":"sonoff_power_meter","ButtonTopic":"0","Power":0,"PowerOnState":3,"LedState":1,"SaveData":1,"SaveState":1,"SwitchTopic":"0","SwitchMode":[0,0,0,0,0,0,0,0],"ButtonRetain":0,"SwitchRetain":0,"SensorRetain":0,"PowerRetain":0}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS1 = {"StatusPRM":{"Baudrate":9600,"GroupTopic":"sonoffs","OtaUrl":"http://thehackbox.org/tasmota/release/sonoff.bin","RestartReason":"Software/System restart","Uptime":"0T00:05:04","StartupUTC":"2018-12-19T00:08:55","Sleep":50,"BootCount":57,"SaveCount":119,"SaveAddress":"F4000"}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS2 = {"StatusFWR":{"Version":"6.4.0(sonoff)","BuildDateTime":"2018-12-16T14:31:02","Boot":31,"Core":"2_4_2","SDK":"2.2.1(cfd48f3)"}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS3 = {"StatusLOG":{"SerialLog":0,"WebLog":2,"SysLog":0,"LogHost":"","LogPort":514,"SSId":["SilvaN",""],"TelePeriod":30,"SetOption":["00C08009","558180C0","00000000"]}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS4 = {"StatusMEM":{"ProgramSize":521,"Free":480,"Heap":17,"ProgramFlashSize":1024,"FlashSize":4096,"FlashChipId":"164068","FlashMode":3,"Features":["00000809","0FDAE794","000383A0","23B617CE","00003BC0"]}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS5 = {"StatusNET":{"Hostname":"sonoff_power_meter-4096","IPAddress":"192.168.1.40","Gateway":"192.168.1.1","Subnetmask":"255.255.255.0","DNSServer":"192.168.1.1","Mac":"80:7D:3A:3C:30:00","Webserver":2,"WifiConfig":5}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS6 = {"StatusMQT":{"MqttHost":"192.168.1.10","MqttPort":1883,"MqttClientMask":"DVES_%06X","MqttClient":"DVES_3C3000","MqttUser":"SilvaN","MqttType":1,"MAX_PACKET_SIZE":1000,"KEEPALIVE":15}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS7 = {"StatusTIM":{"UTC":"Wed Dec 19 00:13:59 2018","Local":"Wed Dec 19 00:13:59 2018","StartDST":"Sun Mar 25 02:00:00 2018","EndDST":"Sun Oct 28 03:00:00 2018","Timezone":"+00:00","Sunrise":"07:39","Sunset":"15:54"}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS9 = {"StatusPTH":{"PowerDelta":80,"PowerLow":0,"PowerHigh":0,"VoltageLow":0,"VoltageHigh":0,"CurrentLow":0,"CurrentHigh":0}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS10 = {"StatusSNS":{"Time":"2018-12-19T00:13:59","ENERGY":{"TotalStartTime":"2018-11-27T19:45:57","Total":189.977,"Yesterday":8.446,"Today":0.027,"Power":250,"ApparentPower":350,"ReactivePower":245,"Factor":0.71,"Voltage":235,"Current":1.490}}}
  00:13:59 MQT: stat/sonoff_power_meter/STATUS11 = {"StatusSTS":{"Time":"2018-12-19T00:13:59","Uptime":"0T00:05:04","Vcc":3.098,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"Wifi":{"AP":1,"SSId":"SilvaN","BSSId":"50:64:2B:92:C6:1D","Channel":8,"RSSI":66}}}

**To Reproduce**
_Steps to reproduce the behavior:_

Just play with TX and RX ports...

**Expected behavior**
_A clear and concise description of what you expected to happen._

It should work as it's hardware connected. RX -> TX and TX -> RX

**Screenshots**
_If applicable, add screenshots to help explain your problem._

**Additional context**
_Add any other context about the problem here._

**(Please, remember to close the issue when the problem has been addressed)**

[Jason2866]

You are right. No bug. Wanted change. See changelog. See https://github.com/arendst/Sonoff-Tasmota/issues/4374 too

[ascillato2]

Closing this issue as it has been answered.

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[digiblur]

@xNuno any tricks on get these working? I followed the Wiki and tried the swapping of pins around. Still zeroes across the board. I have two of these for testing and nothing. I'm starting to think my two PZEMs are bad as I've swapped out everything else a couple times.

[meingraham]

What version of TASMOTA? More to the point, what ESP core? With core 2.3.0, TASMOTA does not support serial communication on pins other than the TX and RX or you can change the core to 2.4.2 that will support your setup using software serial.

[digiblur]

About 10 different versions it feels like and different cores as well as I tried the various other pins on other generic boards. That's why I am thinking it is toast.

[nunofmds]

Yes it worked after login on web and swap the config like I show on picture. Don't forget to power off, wait 5s and power on again both devices, pzem and nodemcu or whatever you are using.