ESP32-to-ESP32 Simplex Communication via ESP-NOW

ESP-NOW protocol is used to allow ESP-32 controllers to communicate in simplex mode.

Link to code:

Contents:
0:00 Introduction
0:29 ESP-NOW Protocol Specs
1:21 Circuit Diagram
2:25 Demonstration
2:46 C++ Sketch of Transmitter
4:55 C++ Sketch of Receiver
6:13 Future Project: Duplex Communication of ESP32-to-ESP32

[jrmichel]

Hello from Sao Paulo/Brazil! Great tutorial! You save me a lot of work and time, after more than ten insucess.

[mh]

Excellent video, also liked the videos in your playlist, you have got another subscriber 👍👍

[theobserver]

Very very helpful video. After days of struggling. Finally success.

[sameerk]

Hello from India Thank you very much for this easy to understand and helpful tutorial... Your channel seems interesting ... I have subscribed and looking forward for more....

[donaldkormos]

Thank you for giving me ideas for my model railroad control ...

[fukushima]

Excellent tutorial man thanks. Got yourself a subscriber...

[attariazeddine]

Excellente présentation, merci beaucoup...

[fotografofrancisley]

You can make a button on node1 send to node2 flashing led help me

[rafaeladrianmartinez]

Good morning, can you help me with a project? please!, I have 2 esp32, I want through the esp32 (master) to sense a magnet (using built-in hall sensor) and then turn on a led on the other esp32 (slave). The connection between the 2 esp32 must be espnow. I hope you can help me, thanks! Using arduino IDE

[farnoud]

it makes no sense if I have to add mac address manually in code. how can I do pairing via a button or sth

[ReviewExpert]

Can any send Voice transfer between two ESP32 Code

[electricalcoder]

when i tried practical communication of two esp boards using espnow i get only 15-20metre maximum range not a completely open area, almost 2-3 walls were there between the two boards. I still dont understand how people claim to have range of above 200metres oin blogs and videos .Do you experience the same Kuzechie?

[mkr]

is there other video for esp to esp LED control and ESP to ESP motor speed control with potentio meter

[qiertwoe]

Sir can you mention the BOARD NAME, Which board I have to configure in 19pin esp32

[sameerk]

Hello Sir... can you please help me to include esp_now.h library to arduino? can't find the library or right way to include it.

[mouseminer]

Please help ... My Arduino IDE would not compile the Receiver side sketch. Here is the error ....

In function 'void setup()':
error: invalid conversion from 'void (*)(const uint8_t*, const uint8_t*, int)' {aka 'void (*)(const unsigned char*, const unsigned char*, int)'} to 'esp_now_recv_cb_t' {aka 'void (*)(const esp_now_recv_info*, const unsigned char*, int)'} [-fpermissive]
56 |
|
| |
| void (*)(const uint8_t*, const uint8_t*, int) {aka void (*)(const unsigned char*, const unsigned char*, int)}
In file included from
note: initializing argument 1 of 'esp_err_t
156 | esp_err_t cb);
|

exit status 1

Compilation error: invalid conversion from 'void (*)(const uint8_t*, const uint8_t*, int)' {aka 'void (*)(const unsigned char*, const unsigned char*, int)'} to 'esp_now_recv_cb_t' {aka 'void (*)(const esp_now_recv_info*, const unsigned char*, int)'} [-fpermissive]

[BarnabasMicah-mz]

Hello bro, what a great project, can you please tell me the range of transmission

[TOMTOM-nhnl]

Thank You Anas, what IDE are you using?

[hero-glzy]

Is there any limtation in number of devices via espnow protocol?

[chathurafernando]

Btw what is the limit of transmitters ? If i want to make a mesh network, how many transmitters can i use ? 🤔