Using ESP-NOW in Arduino · Developer Portal

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Using ESP-NOW in Arduino · Developer Portal

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https://developer.espressif.com/blog/arduino-esp-now-lib/

[rajtan]

Great to see a descriptive write up of using esp-now on arduino. However, I would request and it seems very much in context that you may please provide addition example / code for using ESP-NOW LR mode in Arduino environment for ESP32 and eligible chips/modules. This would perhaps involve using the library function from ESP-IDF for setting up appropriate protocol and data rate. If there is any official example of that in Espressif's repository, please point to that. I did search but did not find ESP-NOW with LR mode example in the giit repository of examples.

[lucasssvaz]

Hi @rajtan. To use the long range mode you just need to call WiFi.enableLongRange(true) before setting the WiFi mode.

[f1netune]

If this protocol is to be used by collecting data from sensors, how many slave devices are supported by this protocol? Is that protocol good for gathering the sensor data? (in its determined range)

[lucasssvaz]

Hi @f1netune,

Nothing prevents you from using ESP-NOW to read sensor data. I will mostly depend on your scenario - if you need encrypted data, the size of the data, how many sensors...

The limitations of ESP-NOW are 20 total paired peers and, out of these, the maximum number of encrypted peers is limited by CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM (range 0–17, default 7).

[MikeyMoMo]

On the recommendation herewith, I tried adding WiFi.enableLongRange(true) as mentioned. It made me lose communication for my transmitter that was previously working at the same spot. Your results may vary but if you turn that on and lose signal, remember you have been warned. When I commented it out (with a note to not use it), I started working again. That was a test spot and the actual landing place for the sensor and ESP may be farther so I was getting ready for any move farther away from the WAP but that will be with the original code, normal range.