esp-idf-espnow-gateway

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.

Battery life

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

Battery life after 112 days using ESP-NOW

Software requirements

ESP-IDF V4.4/V5.x.
ESP-IDF V5.0 is required when using ESP32-C2.
ESP-IDF V5.1 is required when using ESP32-C6.

Installation

git clone https://github.com/nopnop2002/esp-idf-espnow-gateway
cd esp-idf-espnow-gateway
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash monitor

Configuration

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.

Specify the MQTT BROKER in one of the following formats.

• IP address like 192.168.10.120
• mDNS hostname like mqtt-broker.local
• Global hostname like broker.emqx.io

ESP8266 Example Sketch

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

Multiple ESP8266

ESPNOW allows one-to-many communication.
This is logging when two ESP8266s are operated at the same time.

23/11/15 16:17:55 /mqtt/espnow Hello 410041 2965 --> This is from ESP8266 #1
23/11/15 16:18:04 /mqtt/espnow Hello 10001 2981 --> This is from ESP8266 #2
23/11/15 16:18:05 /mqtt/espnow Hello 420042 2965
23/11/15 16:18:14 /mqtt/espnow Hello 20002 2976
23/11/15 16:18:15 /mqtt/espnow Hello 430043 2965
23/11/15 16:18:24 /mqtt/espnow Hello 30003 2976
23/11/15 16:18:25 /mqtt/espnow Hello 440044 2965
23/11/15 16:18:34 /mqtt/espnow Hello 40004 2976
23/11/15 16:18:35 /mqtt/espnow Hello 450045 2965
23/11/15 16:18:44 /mqtt/espnow Hello 50005 2973
23/11/15 16:18:45 /mqtt/espnow Hello 460046 2965
23/11/15 16:18:54 /mqtt/espnow Hello 60006 2977
23/11/15 16:18:55 /mqtt/espnow Hello 470047 2965
23/11/15 16:19:04 /mqtt/espnow Hello 70007 2974
23/11/15 16:19:05 /mqtt/espnow Hello 480048 2965
23/11/15 16:19:14 /mqtt/espnow Hello 80008 2976
23/11/15 16:19:15 /mqtt/espnow Hello 490049 2965
23/11/15 16:19:24 /mqtt/espnow Hello 90009 2972
23/11/15 16:19:25 /mqtt/espnow Hello 500050 2965
23/11/15 16:19:34 /mqtt/espnow Hello 100010 2973