Measure Volts whit digital pin

Hardware
1

Hello.
Is there a sensor to measure volts using a digital pin connected via esp01s?
Thanks

2

AC volts or DC volts?

There are a few i2c devices that home assistant supports that can measure DC voltage (and current). But i2c requires two GPIO pins (data and clock).

e.g.

More here: https://esphome.io/#electricity

3

ESP01S doesn’t really have these two pins?
SCL and SDA?

So I can’t make it with this board?

4
5

I had I2C running on ESP01 for BMP280 on TASMOTA. You just had to assign SCL and SDA to 2 of its pins. Don’t see why you couldn’t do this in ESPhome.

ESP01s I2C
ESP01s I2C614×551 52.1 KB

Don’t connect I2C sensor until you come out of flash mode.

6

Thanks for answer
I’ll try as soon as the sensor comes and I’ll let you know how it turned out :slight_smile:

I still prepared the code. It’s fine?

substitutions:
  device_name: ESP-Vodomer
  friendly_name: ESP-Vodomer

esphome:
  name: esp-relay1
  platform: ESP8266
  board: esp01_1m


sensor:   
  # TCRT5000 pulse counter
  - platform: pulse_counter
    id: water_pulse_counter
    name: "${friendly_name} water consumption"
    pin: GPIO1
    update_interval: 2sec
    internal_filter: 100ms
    unit_of_measurement: "L/min"
    accuracy_decimals: 0
    icon: "mdi:water"
    filters:
      # Divide by 60
      - multiply: 0.0167
      - lambda: return abs(x);

#INA226 DC current and power sensor
  - platform: ina226
    address: 0x40
    shunt_resistance: 0.1 ohm
    current:
      name: "INA226 Current"
    power:
      name: "INA226 Power"
    bus_voltage:
      name: "INA226 Bus Voltage"
    shunt_voltage:
      name: "INA226 Shunt Voltage"
    max_current: 3.2A
    update_interval: 60s
7

Remember to add in section something like

i2c:
  sda: 0
  scl: 2
  scan: True
  id: bus_a
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