Esphome voltage show

ESPHome
1

Hello. And sorry for my bad english. I’m just tinkering around with ESPhome. I built a temperature sensor for my small pool, for outside and water temperature. The whole thing runs on a small solar panel, with TP4056 USB-C charging module, and a 18650 battery. This is how the D1 mini is fed. Everything works so far. My question, can the D1 Mini be queried as to what voltage is currently present? And I would like to have integrated it with ESPhome, if at all possible. Maybe there’s something like Wi-Fi, just for excitement

  • platform: wifi_signal
    name: “WiFi signal”
    update_interval: 60s
2

Yep! The 8266 can read the voltage the chip is getting.

I put it in all my ESP8266 projects by default, along with wifi strength, uptime, etc. just because.

1 Like
3

As I said, I’m an absolute layman. I found and included the following. I set a resistor from 3.3v to A0 and played the following on the D1 mini. and the D1 shows me 1 volt.

- platform: adc
    name: "Batterie"
    pin: VCC
    accuracy_decimals: 2
    update_interval: 60s

So I kept looking and found this`

filters:
- multiply: 3.3

but it shows me over 16v. Then I lowered the multiplier to 1.13. now I’m at 4.06V, (just charging via the solar panel) which also agrees with the meter. Is my approach correct or am I wrong with the multiplier?

DIeter

4

Why did you add a resistor? Is that something specific to your setup/board?

I don’t have any multipliers or extra components on mine and it reads exactly what I’d expect: around 3.3 V.

5

I want to monitor the voltage from the battery that is being charged through the solar panel. That means I’m going to 5v with a resistor of A0. Now it fits but the battery shows 3.89V with the measuring device and in the Home Assistant too.

6

Hey, any luck with reading the values in the end?