Working http call to esphome rest api for slimmelezer+ sensor

ESPHome
1

Hi,

I’m trying to get my slimmelezer to talk to evcc using the esphome REST api.

I’m trying to get some basic http GET calls working but I keep on getting 404 errors. I think I’m just struggling to find the correct api endpoints because I know that the webserver is running (and thus the REST api too) and I know there’s no encryption.

does anyone have an example of a working http GET for a sensor on the slimmelezer+? I should be able to take it from there.

thanks a lot
L

2

Are you able to give an example of what does and doesn’t work?

3

You understand the esphome REST api is for reaching the ESPHome device from the external world, right? I.e. not the equivalent of the RESTfull integration of HA.

If you do, I don’t quite understand how that would enable communication between slimlezer and evcc, and examples of your attempts are welcome.

4

I’ve included a screen of what my postman workspace looks like. AFAIK I’m just sending a simple GET command to an api endpoint for uptime. am I doing it wrong?

thanks for helping!

Screenshot 2023-07-22 at 15.34.37
Screenshot 2023-07-22 at 15.34.371916×2220 177 KB

5

EVCC can talk to RESTful API’s such as the one from esphome. I want EVCC to send http get’s to the esphome api of the slimmelezer to get the values it need to work. does that answer your question?

6

I guess evcc just don’t understand mDNS. Try using the ip address rather than “slimlezer.local”

7

hey koying, thanks for replying.

I’m trying to talk to the slimmelezer api from my pc using postman. at this point evcc is not in the picture yet.

thanks a lot for your suggestion. using the ip gives me the same result. 404 means page not found, but it is a response from the esphome board. I’m sure that part is fine.

8

Could you show your esphome code, please.

9

hey koying, thanks again for helping.

substitutions:
  name: slimmelezer

packages:
  zuidwijk.slimmelezer: github://zuidwijk/dsmr/slimmelezer.yaml@main

esphome:
  name: ${name}
  name_add_mac_suffix: false

api:
  encryption:
    key: xxxxxxxx

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
10

The sensor name is, well, the sensor “name”.
So use, e.g. http://slimmelezer.local/sensor/slimmelezer_uptime

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11

you’re kidding me. that works! thanks a lot :slight_smile: so you just literally copy/paste the sensor name from HA

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