Gosund SP111 outlet flashed to ESPHome

• ESPHome
• Home assistant
• Home automation

The Gosund SP111 is a smart Wi-Fi plug with energy monitoring and 15A power. They come at a good price and use an ESP8266 which runs Tuya Smart/Smart Life, this is the reason that I've bought a bunch of these and flashed them to ESPHome.

All but one of them could be flashed wirelessly via tuya-convert. One of them however needed to be opened and flashed with a USB TTL Converter. The outlets open easily via a screw on the bottom in the hole on the earth connector. Once opened the contact points for connecting the TTL converter are exposed.

Flashing with TTL Converter

You just connect the RX on your TTL to the TX on the SP111 and the TX on the TTL to the RX on the SP111. 3.3v and GND are connected to their respective pins

| TTL | SP111 | | ----- | ----- | | 3.3v | 3.3v | | GND | GND | | RX | TX | | TX | RX | | GND* | GPIO0 |

* Connected a couple of seconds when power is connected to enter flash mode.

After that it was just a matter of using esptool to flash the SP111.

First erasing the flash

sudo esptool.py --port /dev/ttyUSB0 erase_flash

And then writing the firmware to it. sp111 being the firmware generated by ESPHome below.

sudo esptool.py --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 sp111.bin

Generating firmware in ESPHome

The firmware is generated by compiling one of the yamls below in ESPHome and then downloading that file to the working directory of esptool. I've created two different yamls depending on if you wish to show your SP111 as a light or a switch in Home assistant.

SP111 exposed as a light source

substitutions:
  plug: "Kitchen window"
  plug_internal: kitchen_window
  voltage_divider: "771"
  current_resistor: "0.0012"
esphome:
name: $plug_internal
platform: ESP8266
board: esp8285
wifi:
ssid: !secret wifiname
password: !secret wifipass
Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "${plug} fallback hotspot"
password: "3XtYLy5n2pgc"
captive_portal:
Enable logging
logger:
Enable Home Assistant API
api:
ota:
web_server:
port: 80
sensor:
Power sensor

platform: hlw8012
voltage_divider: $voltage_divider
current_resistor: $current_resistor
sel_pin:
number: GPIO12
inverted: true
cf_pin: GPIO05
cf1_pin: GPIO04
change_mode_every: 3
update_interval: 5s
Current sensor
current:
name: "${plug} current"
unit_of_measurement: A
accuracy_decimals: 3
Voltage sensor
voltage:
name: "${plug} voltage"
unit_of_measurement: V
accuracy_decimals: 1
Power sensor
power:
id: power
name: "${plug} power"
unit_of_measurement: W
accuracy_decimals: 0
filters:

multiply: 0.5



binary_sensor:
Binary sensor for the button press

platform: gpio
name: "${plug} button"
pin:
number: GPIO13
inverted: true
on_press:

light.toggle: internal_light



output:
Relay state led

platform: esp8266_pwm
id: state_led
pin:
number: GPIO2
inverted: true
platform: gpio
id: light_relay
pin: GPIO15

light:
Relay state light

platform: monochromatic
output: state_led
id: led
platform: binary
name: $plug
output: light_relay
id: internal_light
on_turn_on:

light.turn_on: led
on_turn_off:
light.turn_off: led



Uses the red LED as a ESPhome status indicator
status_led:
pin:
number: GPIO0
inverted: true

SP111 exposed as a switch

# Just change name here
substitutions:
  plug: "Kitchen window"
  plug_internal: kitchen_window
  voltage_divider: "771"
  current_resistor: "0.0012"
esphome:
name: ${plug_internal}
platform: ESP8266
board: esp8285
wifi:
ssid: !secret wifiname
password: !secret wifipass
Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "${plug} Fallback Hotspot"
password: "3XtYLy5n2pgc"
captive_portal:
Enable logging
logger:
Enable Home Assistant API
api:
ota:
web_server:
port: 80
sensor:
Power sensor

platform: hlw8012
voltage_divider: 771

current_resistor: 0.001
current_resistor: 0.0012
sel_pin:
number: GPIO12
inverted: true
cf_pin: GPIO05
cf1_pin: GPIO04
change_mode_every: 3
update_interval: 5s
# Current sensor
current:
name: "${plug} current"
unit_of_measurement: A
accuracy_decimals: 3
# Voltage sensor
voltage:
name: "${plug} voltage"
unit_of_measurement: V
accuracy_decimals: 1
# Power sensor
power:
id: power
name: "${plug} power"
unit_of_measurement: W
accuracy_decimals: 0
filters:
- multiply: 0.5
binary_sensor:
Binary sensor for the button press

platform: gpio
name: "${plug} button"
pin:
number: GPIO13
inverted: true
on_press:

switch.toggle: relay



switch:
Switch to toggle the relay

platform: gpio
id: relay
name: "${plug} relay"
pin: GPIO15
on_turn_on:

light.turn_on: led
on_turn_off:
light.turn_off: led



output:
Relay state led

platform: esp8266_pwm
id: state_led
pin:
number: GPIO2
inverted: true

light:
Relay state light

platform: monochromatic
output: state_led
id: led

Uses the red LED as a ESPhome status indicator
status_led:
pin:
number: GPIO0
inverted: true