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.
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.
- ESP8266/8285.
Some development boards have a Power LED.
Some development boards have a Serail TX signal LED.
They consume battery.
Since the ESP12 has an LED on the module, it is not suitable for battery operation.
Care should be taken when selecting hardware to reduce battery consumption.
Some WeMos D1 Mini clones cannot be started with 3V power supply.
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
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
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
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