iphong / esphome-espnow

Direct communication between esp devices without home assistant

Phong Vũ

CTO and TechLead at BraveBits/PageFly

• Software Engineer
• Hardware Engineer
• Graphic Designer

esphome-espnow's Issues

upstream to esphome

Would be great to have this directly integrated in esphome 🎉

esphome/feature-requests#275

Transparent encription integration on ESP-NOW using dynamic key

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

Channel setting is not wifi channel, and workarounds

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.