WB3S, BL0937 Single Phase Din Energy Meter: Resolving NaN Voltage, Current & Power Values

Question

I am new to this, so please bear with me.

I have a Single Phase Din Energy meter which contains the WB3S and BL0937.
I have flashed the module with 1.17.129 and configured the Pins (traced BL0937 pins back to MCU)
(Will provide pictures and tear-down details when working!)

All my energy values display NaN for all voltage, current, power values.
Is this likely a configuration issue, or might I have introduced a hardware fault?

p.kaczmarek2 · Answer

Have you calibrated your device? Calibration can be done via GUI, go to Web App->Tools->see Calibration section, or do it in old style, VoltageSet, etc commands.
Are the GPIOs correct?
Please extract Tuya Config and attach it here for validation:

nickhills · Answer

Yes I have calibrated it, but seems to make no difference.

The GPIO's are i think correct - the following is mapped:

{
  "vendor": "Tuya",
  "bDetailed": "0",
  "name": "Full Device Name Here",
  "model": "enter short model name here",
  "chip": "BK7231T",
  "board": "TODO",
  "flags": "0",
  "keywords": [
    "TODO",
    "TODO",
    "TODO"
  ],
  "pins": {
    "6": "WifiLED_n;0",
    "7": "Btn_n;0",
    "8": "BL0937CF1;0",
    "9": "BL0937CF;0",
    "24": "BL0937SEL;0"
  },
  "command": "",
  "image": "https://obrazki.elektroda.pl/YOUR_IMAGE.jpg",
  "wiki": "https://www.elektroda.com/rtvforum/topic_YOUR_TOPIC.html"
}

I have attached the tuya config - I cant extract it, as it reports missing the keys?

nickhills · Answer

False alarm - Apologies.In order to flash the WB3S i had to desolder it from the rest of the module (first time using a hot air station) It seems that when I flowed it back on both the pads used for CF CF1 had not reflowed properly.Your comment about the GPIO did prompt me to go back and recheck the connections though! Because i had traced the pin out on the system board before adding the WB3S back on, it made me wonder if my soldering had failed!I'd still be interested if you can open the tuya config file though.

nickhills · Answer

Reflowed WB3S

p.kaczmarek2 · Answer

While it's good to see you have it figured out, I will just note here that the attached Tuya Config indeed has no user_param_key section and I can't see any GPIO templates in it. So it's good that you figured GPIO yourself.

It has some other data, but no pins:


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  "     B astro_timer   ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"timestamp":1675790607,"index":0}˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙Ŕ       řB mf_test_close  ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙true ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙        ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":2 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region":"EU","reg_key":"3eUX","dns_prio":1 }˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙{"nc_tp":9,"ssid":"QlQtWjJDVEpT","passwd":"OTRVdGM2RzdDa0o5bjY=","md":0,"random":0,"wfb64":1,"stat":2,"token":"TCr252Qt","region        ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙":"EU","reg_key":"3eUX","dns_prio":2

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

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[Solved] WB3S, BL0937 Single Phase Din Energy Meter: Resolving NaN Voltage, Current & Power Values

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