Tasmota

Table of Contents

Device:
Flashing:

Update from my side
Update from nos86

Smart Plugs from Amazon with same internal parts:

Device:

solid design with 16A Relays
8 MB memory chip
2 LEDs
POW function (unfortunately did not test yet, need help)
very small size, easy to disassemble
no need to disassemble PCBs
test mode works with 5 or 3.3 V (relays also works)

Disassemble

take off the lead with 2 screws
put small cross screwdriver inside 220V plug connector, there are 2 screws
free the antenna from plastic (no need to disconnect)
pull of PCB from the case

Important build flags.

in Platformio for Tasmota flag change from 1MB to 8MB is needed, otherwise flash fails. build_flags = ${esp82xx_defaults.build_flags} -Wl,-Teagle.flash.8m.ld
in Arduino IDE: board selected - "Node MCU 1.0", standard

Found how some of PINS are linked to main PCB and are easy to connect for flashing

PCB

Flashing:

I've decided to use 5V - there is a painted pad on the PCB, clean it and attach 5V (see image)

Connect GPIO0 to GND
Connect RX, TX
Connect 5V and GND
Connect USB to PC, start flashing

Tasmota WEB config (Generic)

GPIO0 - Led1i
GPIO2 - Led2i
GPIO5 - HLW8012 CF
GPIO12 - HLWBLSELi
GPIO13 - Button1
GPIO14 - HLWBL CF1
GPIO15- Relais1

webconfig

IMPORTANT: in order to have an accurate measurement of Voltage/Current/Power, you have to calibrate the internal meter with a well know load (like lamp or hair dryer) using this detailed procedure.

Update from my side

I managed to flash two Aisirer plugs using pre-compiled tasmota.binaries, since my plugs had only 1M flash. I used 3.3V connected directly to the ESP board. I had some trouble with WLAN connectivity which caused the relays to pulse, so I switched to 2.3.0 core, which seems default again since a few releases. This runs quite well. Configure as BlitzWolf SHP(45) Module and also the power measurement is working.

Update from nos86

I have updated the guide in order to interface Tasmota with the power meter inside smart plug (tested only on AISIRER) and added the link for the power monitoring calibration

Wiki has moved to link on the left.