Gateway between esp-now and MQTT using esp-idf.

I was inspired by this.

ESP-NOW can be used with ESP8266/8285, but we cannot use WiFi at the same time.
This project transfers the data received by ESP-NOW to MQTT.

ESP8266/8285 + battery + ESP-NOW + DeelSpeep enables long-time operation.
This is a comparison of battery consumption between Wifi and ESP-NOW.

git clone https://github.com/nopnop2002/esp-idf-espnow-gateway
cd esp-idf-espnow-gateway
idf.py set-target esp32
idf.py menuconfig
idf.py flash monitor

You have to set this config value using menuconfig.

• CONFIG_STA_WIFI_SSID
  SSID of your wifi.
• CONFIG_STA_WIFI_PASSWORD
  PASSWORD of your wifi.
• CONFIG_STA_MAXIMUM_RETRY
  Maximum number of retries when connecting to wifi.
• CONFIG_BROKER_URL
  URL of MQTT broker.
• CONFIG_ESPNOW_ENABLE_LONG_RANGE
  Enable long-range ESP-NOW.
  When enable long range, the PHY rate of ESP32 will be 512Kbps or 256Kbps.

There is two example.
Replace the remote MAC address with your ESP32 MAC address.

uint8_t remoteDevice[] = {0x24, 0x0a, 0xc4, 0xef, 0xaa, 0x65};

When you run this project on the ESP32, you will see ESP32 MAC address:

• espnow-controller
  Publish every 10 seconds.
  I used broker.emqx.io as MQTT broker.

$ mosquitto_sub -v -h broker.emqx.io -p 1883  -t "/mqtt/espnow" | ts "%y/%m/%d %H:%M:%S"
21/08/11 16:52:25 /mqtt/espnow Hello 10001 2968
21/08/11 16:52:35 /mqtt/espnow Hello 20002 2966
21/08/11 16:52:45 /mqtt/espnow Hello 30003 2966
21/08/11 16:52:55 /mqtt/espnow Hello 40004 2965
21/08/11 16:53:05 /mqtt/espnow Hello 50005 2966
21/08/11 16:53:15 /mqtt/espnow Hello 60006 2965

• espnow-controller-deepSleep
  Wake up from Deep Sleep every 60 seconds and publish.
  You need to connect Resets and GPIO16.
  I used broker.emqx.io as MQTT broker.

$ mosquitto_sub -v -h broker.emqx.io -p 1883  -t "/mqtt/espnow" | ts "%y/%m/%d %H:%M:%S"
21/08/11 16:40:32 /mqtt/espnow Hello 66 2904
21/08/11 16:41:30 /mqtt/espnow Hello 68 2908
21/08/11 16:42:29 /mqtt/espnow Hello 67 2908
21/08/11 16:43:29 /mqtt/espnow Hello 67 2907
21/08/11 16:44:28 /mqtt/espnow Hello 68 2911
21/08/11 16:45:27 /mqtt/espnow Hello 67 2906