Good morning. I couldn’t find any information on how to hack a Sonoff POW R3 to make it an ESPHome device. Can someone please help me?
Thank you
Have you had any joy with this? I have a POW R3 on order and also want to intigrated with HA using ESPHome (I am migrating devices to ESPHome to avoid having to run a seperate MQTT server).
Almost… for some reason the switch want work, and the V showing 15v - but its a start, to get you online.
esphome:
name: sonoffvpkids
esp32:
board: nodemcu-32s
Enable logging
logger:
wifi:
ssid: xxxxx
password: xxxxx
Optional manual IP
manual_ip:
static_ip: x.x.x.x
gateway: x.x.x.x
subnet: 255.255.255.0
dns1: x.x.x.x
Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: “sonoffvpkids Fallback Hotspot”
password: “xxxxxxxxxxxxx”
captive_portal:
Enable Home Assistant API
api:
password: “xxxxx”
ota:
password: “xxxxx”
uart:
rx_pin: GPIO16
baud_rate: 4800
sensor:
- platform: cse7766
update_interval: 2s
current:
name: sonoffvpkids Current
id: a_sensor
voltage:
name: sonoffvpkids Voltage
id: v_sensor
power:
name: sonoffvpkids Power
id: w_sensor
on_value_range:
- above: 4.0
then:
- light.turn_on: switch_led
- below: 3.0
then:
- light.turn_off: switch_led
energy:
name: sonoffvpkids Energy
id: wh_sensor
output:
- platform: ledc
id: led
pin:
number: GPIO18
inverted: True
light:
- platform: monochromatic
id: switch_led
output: led
internal: True - platform: status_led
id: wifi_status_led
internal: True
pin:
number: GPIO05
inverted: True
switch:
- platform: template
name: sonoffvpkids sw
optimistic: true
id: relay_1
lambda: |-
if (isnan(id(w_sensor).state)) {
return {};
} else if (id(w_sensor).state > 4) {
// Running
return true;
} else {
// Not running
return false;
}
turn_off_action:- switch.turn_on: relay_off
turn_on_action: - switch.turn_on: relay_on
- switch.turn_on: relay_off
- platform: gpio
restore_mode: ALWAYS_OFF
internal: true
id: relay_off
pin: GPIO04
on_turn_on:- switch.turn_on: relay_off
- delay: 500ms
- switch.turn_off: relay_off # bi-stable relay so no need to keep on.
- light.turn_off: switch_led
interlock: [relay_on]
- platform: gpio
restore_mode: ALWAYS_OFF
internal: true
id: relay_on
pin: GPIO02
on_turn_on:- switch.turn_on: relay_on
- delay: 500ms
- switch.turn_off: relay_on # bi-stable relay so no need to keep on.
- light.turn_on: switch_led
interlock: [relay_off]
- platform: restart
name: sonoffvpkids Restart
2 Likes
Not sure if this is helpful, but I recently set up a Sonoff POW R3 with ESPHome for use with a hot water tank immersion heater.
Took various bits of code from various sources locally and online. In my case, I’ve added 3 Dallas temperature sensors connecting to GPIO4 so I can monitor the tank temperature.
I’m using this to utilise spare solar power after the car is charged. (better than selling to the grid for 4p a kWh 
)
I initially used GPIO15 for the temperature sensors but that stopped everything from working.
substitutions:
esphome_name: hotwatersonoff
esphome_friendly_name: Hot Water Sonoff
esphome:
name: ${esphome_name}
friendly_name: Hot Water Heater Sonoff
esp8266:
board: esp8285
# Enable logging
logger:
baud_rate: 0
# Enable Home Assistant API
api:
encryption:
key: "xxxxxxxxx"
ota:
password: "xxxxxxxxx"
wifi:
output_power: 18db
power_save_mode: light
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Hot-Water-Heater-Sonoff"
password: "xxxxxxxxx"
captive_portal:
dallas:
- pin: GPIO4
# Enable web server
web_server:
port: 80
time:
- platform: homeassistant
timezone: Europe/London
#GPIO0 Button (inverted)
#GPIO12 Relay and Red LED
#GPIO13 Blue LED (inverted)
uart:
rx_pin: RX
baud_rate: 4800
binary_sensor:
- platform: gpio
pin:
number: GPIO0
mode: INPUT_PULLUP
inverted: True
name: "${esphome_friendly_name} Button"
on_press:
- switch.toggle: fakebutton
switch:
- platform: template
name: "Hot Water Relay"
optimistic: true
id: fakebutton
turn_on_action:
- switch.turn_on: relay
- light.turn_on: led
turn_off_action:
- switch.turn_off: relay
- light.turn_off: led
- platform: gpio
id: relay
inverted: yes
pin: GPIO12
restore_mode: RESTORE_DEFAULT_ON
output:
- platform: esp8266_pwm
id: pow_blue_led
pin:
number: GPIO13
inverted: True
light:
- platform: monochromatic
name: "${esphome_friendly_name} Blue LED"
output: pow_blue_led
id: led
internal: true
sensor:
- platform: wifi_signal
name: "${esphome_friendly_name} WiFi Signal"
update_interval: 60s
- platform: uptime
name: "${esphome_friendly_name} Uptime"
- platform: cse7766
update_interval: 2s
current:
name: "${esphome_friendly_name} Current"
voltage:
name: "${esphome_friendly_name} Voltage"
power:
name: "${esphome_friendly_name} Power"
energy:
name: "${esphome_friendly_name} Energy"
- platform: dallas
address: 0xb60000001284c428
name: "${esphome_friendly_name} Temperature Sensor 1"
id: temp_1
icon: "mdi:water-thermometer"
filters:
- filter_out: nan
- platform: dallas
address: 0x4f00000012821c28
name: "${esphome_friendly_name} Temperature Sensor 2"
id: temp_2
icon: "mdi:water-thermometer"
filters:
- filter_out: nan
- platform: dallas
address: 0xb10000001483f228
name: "${esphome_friendly_name} Temperature Sensor 3"
id: temp_3
icon: "mdi:water-thermometer"
filters:
- filter_out: nan
- platform: template
name: "{esphome_friendly_name} Average Tank Temperature"
icon: "mdi:water-thermometer"
unit_of_measurement: "°C"
lambda: |-
return (id(temp_1).state + id(temp_2).state + id(temp_3).state)/3;
update_interval: 60s
- platform: template
name: "{esphome_friendly_name} Max Tank Temperature"
icon: "mdi:water-thermometer"
unit_of_measurement: "°C"
lambda: |-
return ((id(temp_1).state > id(temp_2).state) ? ((id(temp_1).state > id(temp_3).state) ? id(temp_1).state : id(temp_3).state) : (id(temp_2).state > id(temp_3).state) ? id(temp_2).state : id(temp_3).state);
update_interval: 60s
- platform: template
name: "{esphome_friendly_name} Min Tank Temperature"
icon: "mdi:water-thermometer"
unit_of_measurement: "°C"
lambda: |-
return ((id(temp_1).state < id(temp_2).state) ? ((id(temp_1).state < id(temp_3).state) ? id(temp_1).state : id(temp_3).state) : (id(temp_2).state < id(temp_3).state) ? id(temp_2).state : id(temp_3).state);
update_interval: 60s
1 Like
Hi Rich/Thansen1980 , can any of you post the clean configuration that will work with pow r3 (25A) for esp home
Thank you so much 
+1, any clean fully working config?
define “clean”, pls 
This one should be undaerstandable, tho it has some extra lambdas, but all are explainded with comments. Working fawlessly here with my Sonoff pow origin (POWR316). The 3 dashes at the beginning are to make things easier for the yaml parser, but it’s not mandatory.
---
##### information #####
# model: Sonoff pow origin (POWR316)
# explication: https://templates.blakadder.com/sonoff_POWR316.html
# buy: https://www.aliexpress.com/wholesale?SearchText=sonoff+powr316
# GPIO Pinout
# ---------------------------------------
# | Pin | Component |
# |========|============================|
# | GPIO0 | Button |
# |--------|----------------------------|
# | GPIO05 | Status LED (inverted) |
# |--------|----------------------------|
# | GPIO13 | Relay |
# |--------|----------------------------|
# | GPIO16 | CSE7766 Rx |
# |--------|----------------------------|
# | GPIO18 | LED (inverted) |
# ---------------------------------------
# As the communication with the CSE7766 is done using UART, you need to have an UART bus in your configuration with the rx_pin connected to the CSE7766.
# Additionally, you need to set the baud rate to 4800.
##### basic configs #####
# set up variables
substitutions:
my_name: 'POW316-WM'
my_device: pow316-wm
my_reboot_timeout: 30min
my_update_interval: 12sec
my_static_ip: 10.11.12.13
# define core configs
esphome:
name: ${my_device}
friendly_name: ${my_name}
area: 'Waschküche'
comment: I usually comment the last change here
on_boot:
priority: -100
then:
- switch.turn_on: relay
esp32:
board: esp32dev
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
fast_connect: true
reboot_timeout: ${my_reboot_timeout}
manual_ip:
static_ip: ${my_static_ip}
gateway: 192.168.1.1
subnet: 255.255.255.0
dns1: 192.168.1.1
dns2: 9.9.9.9
ap:
# after connecting to it, navigate to http://192.168.4.1/
ssid: '${my_name} AP'
password: !secret ap_wifi_password
ap_timeout: 1min
captive_portal:
api:
reboot_timeout: ${my_reboot_timeout}
encryption:
key: !secret native_api_key
ota:
safe_mode: true
password: !secret ota_password
logger:
level: DEBUG
# Disable logging to serial
baud_rate: 0
web_server:
port: 80
auth:
username: !secret web_srv_user
password: !secret web_srv_pswd
time:
- platform: homeassistant
id: homeassistant_time
on_time:
# device restart (5 minutes after dhcp router and WiFi APs reboot)
- days_of_week: THU
hours: 4
minutes: 35
seconds: 0
then:
- button.press: reboot
# shift values sortly before midnight reset
- hours: 23
minutes: 59
seconds: 59
then:
- sensor.template.publish:
id: power_today_minus_3
state: !lambda return id(power_today_minus_2).state;
- sensor.template.publish:
id: power_today_minus_2
state: !lambda return id(power_today_minus_1).state;
- sensor.template.publish:
id: power_today_minus_1
state: !lambda return id(power_today).state;
#### specific configs #####
uart:
rx_pin: GPIO16
baud_rate: 4800
data_bits: 8
parity: EVEN
stop_bits: 1
binary_sensor:
# define button on device and it's press action
- platform: gpio
name: '${my_name} Taster'
pin:
number: GPIO0
mode:
input: true
pullup: true
filters:
# eliminate bouncing noise
- delayed_on_off: 25ms
on_press:
then:
- switch.toggle: relay
# show as active when power reading is above 0W, idle when it's 0W. Both if state persists for at least 2 update cicles.
- platform: template
name: '${my_name} aktivity'
device_class: power
filters:
# eliminate bouncing noise
- delayed_on_off: 24s
lambda: 'if (id(power).state>(0)) return true; else return false;'
- !include common/binary_sensors/status.yaml
switch:
- platform: gpio
name: '${my_name} Relais'
icon: 'mdi:lightning-bolt-circle'
id: relay
pin: GPIO13
restore_mode: RESTORE_DEFAULT_ON
on_turn_on:
light.turn_on: led
on_turn_off:
light.turn_off: led
button:
- !include common/buttons/restart_button.yaml
- !include common/buttons/restart_safe_mode.yaml
sensor:
# energy measurement
- platform: cse7766
# voltage sensor
voltage:
name: '${my_name} voltage'
id: voltage
unit_of_measurement: 'V'
accuracy_decimals: 1
device_class: voltage
state_class: measurement
icon: 'mdi:alpha-v'
filters:
# agreggate values of polls
- throttle_average: ${my_update_interval}
# map from sensor -> measured value
- calibrate_linear:
- 0.647 -> 0.0
- 221.1-> 219
- 230 -> 226.5
# set not a number and values below 5V to zero or state value in V
- lambda: 'if (isnan(x)) return(0); else if (x<(5)) return(0); else return(x);'
# don't report minor changes from previous value
- delta: 1
# current sensor
current:
name: '${my_name} current'
id: current
unit_of_measurement: 'A'
accuracy_decimals: 3
state_class: measurement
icon: 'mdi:alpha-a'
filters:
# agreggate values of polls
- throttle_average: ${my_update_interval}
# map from sensor -> measured value
- calibrate_linear:
- 0.0 -> 0.004
- 3.374 -> 3.37
- 4.846 -> 4.864
- 8.045 -> 8.097
# set not a number and low values plus own consumption to zero or correct higher values with own consumption and state value
- lambda: 'if (isnan(x)) return(0); else if (x<(0.025 + 0.008)) return(0); else return(x - 0.008);'
# don't report minor changes from previous value
- delta: 0.02
# power sensor
power:
name: '${my_name} power'
id: power
device_class: power
state_class: measurement
unit_of_measurement: W
accuracy_decimals: 1
icon: 'mdi:alpha-w'
filters:
# agreggate values of polls
- throttle_average: ${my_update_interval}
# map from sensor -> measured value
- calibrate_linear:
- 0.0 -> 1.2
- 768.4 -> 771.7
- 1110.3 -> 1109
- 1807.4 -> 1802
# set not a number and values below 5W plus own consumption to zero or correct higher values with own consumption and state value
- lambda: 'if (isnan(x)) return(0); else if (x<(5 + 1.2)) return(0); else return(x - 1.2);'
# don't report minor changes from previous value
- delta: 1
# energy sensor
energy:
name: '${my_name} energy'
id: energy
device_class: energy
state_class: measurement
accuracy_decimals: 1
unit_of_measurement: 'Wh'
filters:
# agreggate values of polls
- throttle_average: ${my_update_interval}
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
# don't report minor changes from previous value
- delta: 0.5
# power factor
- platform: template
update_interval: ${my_update_interval}
name: '${my_name} power factor'
unit_of_measurement: '%'
device_class: power_factor
state_class: measurement
id: power_factor
accuracy_decimals: 1
icon: 'mdi:decagram-outline'
lambda: 'return id(power).state / id(voltage).state / id(current).state;'
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x*100);'
# don't report changes from previous value lower than 1%
- delta: 1
# total daily energy
- platform: total_daily_energy
name: '${my_name} total daily energy'
id: power_today
power_id: power
accuracy_decimals: 1
unit_of_measurement: 'Wh'
state_class: total_increasing
device_class: energy
icon: 'mdi:numeric-0-box-outline'
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
# shifting total daily energy short before reset at midnight
- platform: template
name: '${my_name} total energy today -1'
id: power_today_minus_1
accuracy_decimals: 1
unit_of_measurement: 'Wh'
icon: 'mdi:numeric-1-box-outline'
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
- platform: template
name: '${my_name} total energy today -2'
id: power_today_minus_2
unit_of_measurement: 'Wh'
accuracy_decimals: 1
icon: 'mdi:numeric-2-box-outline'
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
- platform: template
name: '${my_name} total energy today -3'
id: power_today_minus_3
accuracy_decimals: 1
unit_of_measurement: 'Wh'
icon: 'mdi:numeric-3-box-outline'
filters:
# delete not a number or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
- platform: uptime
id: uptime_sensor
internal: true
on_raw_value:
then:
- text_sensor.template.publish:
id: uptime_human
state: !lambda |-
int seconds = round(id(uptime_sensor).raw_state);
int days = seconds / (24 * 3600);
seconds = seconds % (24 * 3600);
int hours = seconds / 3600;
seconds = seconds % 3600;
int minutes = seconds / 60;
seconds = seconds % 60;
return (
(days ? to_string(days) + "d " : "") +
(hours ? to_string(hours) + "h " : "") +
(minutes ? to_string(minutes) + "m " : "") +
(to_string(seconds) + "s")
).c_str();
# WiFi rssi in dBs
- platform: wifi_signal
id: wifi_rssi_dbs
internal: true
update_interval: 5min
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
# WiFi rssi in percents
- platform: template
name: '${my_name} WiFi Signalstärke'
id: wifi_rssi
update_interval: 5min
unit_of_measurement: '%'
accuracy_decimals: 0
icon: mdi:wifi-strength-2
lambda: |-
if (id(wifi_rssi_dbs).state < -92.0)
return 1.0;
if (id(wifi_rssi_dbs).state > -21.0)
return 100.0;
else
return round(( -0.0154 * id(wifi_rssi_dbs).state * id(wifi_rssi_dbs).state ) - ( 0.3794 * id(wifi_rssi_dbs).state ) + 98.182 );
filters:
# set not a number to zero or state value
- lambda: 'if (isnan(x)) return(0); else return(x);'
# do not report changes lower than +-2%
- delta: 2.0
output:
- platform: ledc
pin: GPIO18
id: onboard_led
inverted: true
max_power: 0.66
light:
- platform: monochromatic
output: onboard_led
id: led
internal: true
text_sensor:
- platform: wifi_info
ip_address:
name: '${my_name} IP'
id: espip
icon: mdi:ip-network-outline
ssid:
name: '${my_name} SSID'
id: espssid
icon: mdi:access-point-network
bssid:
name: '${my_name} BSSID'
id: espbssid
icon: mdi:plus-network-outline
- platform: template
name: '${my_name} MAC'
id: espmac
icon: mdi:minus-network-outline
update_interval: 15min
lambda: |-
return {WiFi.macAddress().c_str()};
- platform: version
name: '${my_name} ESPHome Version'
- platform: template
name: '${my_name} Uptime'
id: uptime_human
icon: mdi:clock-start
status_led:
# use blue LED as status indicator
pin:
number: GPIO05
inverted: true
Is it possible to output to the serial port on the board? I need some help with the UART I think,
Hi,
You have a number of include files. Can you provide the code for these or a link to a repository where they have been sourced?
Thanks in advance.
Hi @RichShort
Could you please share pinout diagram? I don’t know how to identity free gpio pins on PCB? I also want to connect temp sensor and use in my water heater
Long delay, sorry didn’t get a notification. In case you still need it I used GPIO15
Other pins probably work too. Depends how many you need
0,12,13 are used by sonoff so those can’t be used.
Hi everyone,
I just published a detailed guide on how to flash a Sonoff POW R3 with ESPHome. This tutorial covers the entire process, from hardware preparation to firmware configuration, and includes tips for integrating the device into Home Assistant.
If you’re looking to customize your Sonoff POW R3 for better energy monitoring or local control, this guide might help!
Feel free to ask if you have any questions or need further clarification. Happy flashing! 
Hi everyone,
I’ve recently got a Sonoff POW R3 and attempting to flash it with ESPHome firmware.
However, I appear to be failing at the first hurdle! So far I’ve read a couple of guides on this but I can’t for the life of me get this thing into flashing mode.
It doesn’t seem to matter how long it hold the ‘Flashing’ button for, I just get no response. The FTDI tried to communicate but no get no response - I’ve tried switching the TX/RX pins to no avail.
I know the FTDI board and wires works, I’ve just checked the esptool flash-id command returns data with one of the SONOFF light switch I’ve got.
The guide by ‘sigalou’ suggests that the blue led should got off when it’s in flashing mode, but that just stays constantly on for me - though slightly dimmer that if I let it boot normally.
The board in my POW R3 appears to be dated 2022/12/26. I’m using an FTDI FT232RI which is fine for all the light switch I have - maybe I need a different one for this?
Any suggest/pointers as to were I’m going wrong with this would be much appreciated.
Many thanks