Flash TREEYE WiFi Smart Plug with Tasmota

How did I get here?

I saw a very good offer for a Wi-Fi Smart Plugs with an Energy Monitoring and I couldn't resist.

The plug was of the TREEYE brand (I had not heard it in my life) but I saw that they were TUYA and I said to myself... they sure are compatible with tuya-convert. ERROR!

I was surprised that tuya-convert didn't work and decided to open it for manual flashing. Oh My God! They didn't have an ESP8266 but a WB2S module!

I found the BL(Shanghai Belling) BL0937 energy monitoring integrated circuit but I have seen that it is similar to Hiliwei Tech HLW8012.

Researching online I saw that some users had the same thing happened on other very similar devices (TW-02 and A916DL).

I decided to try replacing the WB2S module with an ESP-12 and see if it would work.

I would not be doing this guide if I had failed. ;)

Let's go!

• I bought some ESP-12 (you never know when you may need them) and Burner Board for ESP-12.
• I flashed my ESP-12 with Tasmota and set it up on a Wi-Fi Network.
• Desolder the WB2S module being careful not to break the tracks on the circuit. To use a braid solder remover wick wire.
• Solder the ESP-12 to the socket. I used 8cm for each 30AWG gauge wire. Here you can see an example of the connection diagram and the colors that I use:

                              ┌──┐
  GPIO 14 ◄────── RELAY ┌───┐ │  │
                  GREEN └───┘ │  │
                              │  │ ┌───┐ NONE
  GPIO 13 ◄─ HLWBL SELi ┌───┐ │  │ └───┘
                  WHITE └───┘ │  │
                              │  │ ┌───┐ NONE
                   NONE ┌───┐ │  │ └───┘
                        └───┘ │  │
                              │  │ ┌───┐ LED ───────► GPIO 12
   GPIO 2 ◄───── BUTTON ┌───┐ │  │ └───┘ BLUE
                 YELLOW └───┘ │  │
                              │  │ ┌───┐ BL0937 CF ─► GPIO 5
      GND ◄──────── GND ┌───┐ │  │ └───┘ WHITE
                  BLACK └───┘ │  │
                              │  │ ┌───┐ HLWBL CF1 ─► GPIO 4
      VCC ◄─────── 3.3V ┌───┐ │  │ └───┘ WHITE
                    RED └───┘ │  │
                              └──┘
  

  IMPORTANT NOTE: Don't forget to connect EN to VCC and GPIO 15 to GND with a 10kΩ resistor so that the ESP-12 starts up properly.
• Place everything carefully and close the lid with hot silicone glue.

Setup Tasmota

• Set the template in Tasmota:

  {"NAME":"TREEYE Plug","GPIO":[0,0,32,0,2656,2720,0,0,0,2624,224,0,0,0],"FLAG":0,"BASE":18}

• For power monitoring calibration see wiki.