iphong / esphome-espnow Goto Github PK

I spent some time to make this work, so I'll share my findings here to save some time to the next person :)

Findings:

1. The channel passed to begin is not the wifi channel, which is very important if only one of the sensors is connected to wifi.
2. Setting the third param of "esp_now_add_peer" to the channel somehow also doesn't work in keeping the channel.
3. Don't use power_save_mode: HIGH in the receiver wifi component (doh!)
4. Set the channel on the sender right before sending, using wifi_set_channel(RECEIVER_WIFI_CHANNEL);

If the receiver device is connected to wifi and the sender isn't (typical battery application), then the receiver will be listening in whatever channel the wifi AP is. To fix this, change the channel of the sender right before sending:

sensor:
  - platform: adc
    pin: A0
    name: "battery-sensor v"
    on_value:
      then:
        - lambda: |-
            wifi_set_channel(RECEIVER_WIFI_CHANNEL); // <---- this!
            EspRC.send("battery-sensor-v", String(x, 5));

yes, it has too be done before sending and every time. I don't know why.

Deep sleeping right after works perfectly.

Would be great to have this directly integrated in esphome 🎉

esphome/feature-requests#275

Hi, I've been working on ESP-NOW for a while. You can find my work on https://github.com/gmag11/EnigmaIOT. Maybe you find it useful for your project

Hello @iphong.

I was checking your repo and it is one the most similar ones that achieves what I want. So, I thought maybe you can guide me towards the solution I am looking for.

I am looking something similar as you have in your repo with the motion sensor. Specifically, I want one ESP device with a button connected. My idea is to have this device sleeping and wake up only when the button is pressed, send data by espnow, and then send it to sleep again. Your implementation about the motion sensor is quite similar, but I am wondering how to send the device to sleep. (All of this using esphome)

Will be nice if you can guide me how to add this functionality. And sorry if this question is too basic (I am really new here).
Thank you in advance,
Francisco