ESP32: How to setup ESP NOW for One Way Wireless Communication

In this video I'll be showing how to simplify ESP NOW as much as possible to send structured messages from one ESP32 to another. ESP NOW is a great protocol for sharing information between Expressif devices, and is much faster to initialize and start communicating than some other protocols.

I use it to remote control my pan/tilt mechanism, but you can use the principles of the tutorial to create almost any remote control project. If you want to see a 2 way communication video, let me know.

Follow me on Twitter: @BaldGuyDIY

[willmaxwell]

wow, just plain wow. You explained so much in great detail. Now I need some Tylenol for my headache from so much information. I will watch this again very soon. This is great!

[guygriffith]

I am dipping my toe into ESP NOW for the 1st time. your video is one of the better videos I have seen, because this subject is not straightforward at all.
Thank you and can't wait to see more on this subject.

[very-very-bored]

Thank you so much! This video was amazing and I finally managed to set up near wireless communication with my turret!

[MarkHopewell]

Thank you for the added visual and verbal clarity.

[garagineer]

Great video brother! Can't wait to see what you've got on 2-way communication

[stunner]

I am so glad that i found this video. I just started with Arduino & ESPnow and all i was found didn´t help me to understand how that works. Thanks a lot man!

[shiftyjesusfish]

Thank you so much for this video, took me longer than it probably should have to get this figured out but I cant wait to make a toy car for my kid using this :D (its perfect, im going to use one axis for the steering, and the other servo to provide a analog input of sorts on the drill circuit im using as the supply to the old drill motor, this solved like 85% of the coding headache for me!)

[bigpickles]

I also trawled through a lot of the other videos. This is helpful. Thanks, bro.

[aomayelovely]

Hi I wonder where can I find esp_now.h library? Thank you for answering.

[bobredondo]

Thanks, very good. I'm working on something similar and I can probably use the code in this video.

[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 ?

[HandsomeDevil]

so in observattion of this video it didnt appear to be necessary to declare any pin numbers or did I miss something? switchpin no number declared. is that corect? PS didnt realize that was the reciever disregard

[thelastword]

Where did the esp_now.h library come from?

[Parahooners]

Great video, do you know if the bare min sketched you used is still available ? checked all the latest Libs and examples seem to have all been updated now, so the new min sketch is quite difficult to walk through...

[mrc]

Is there any special reason why you did not use the broadcast address? It would make things even simpler, as any listening ESP would receive the signal from the sender ESP. Another advantage is that it would directly work with any new "receiver" as the broadcast MAC-address will always work and be the same?
I ask as I experienced some issues (maybe because of the broadcast address). As long as my ESPs were connected to any WLAN it was OK. As soon as there was no WLAN (no idea why ...) the receiver started loosing some messages that caused jitter. Did you experience any anything similar?

[anandar]

Nice explanation dude👍 can u pls make a video on master and slave communication (esp now protocol) and slave must continuosly monitor the status of the gpio pin of the master, if master pin is High then slave must receive data and it should enable the one of it's GPIO pin to HIGH .

[kiranghatge]

Hello.... good how can use ESP NOW for ( pick to light system) .

[arjunendekan]

excuse me sir, can u make video ESP-NOW communication many-to-one configuration

[keithyordy]

Im attempting to copy your code. you showed your code for the receiver but not the sender, only the example. i need the code for the joystick side. I got it to connect and the servo moves but I cant map the joystick to the servo for some reason. is there a GitHub you have posted your final codes at for RX/TX ? or can you send it to me?

[michaelaldape]

I’m trying to send a PPG signal through an esp8266 client to a esp8266 server, and I’m having trouble with sending data to the server. The client reads the values perfectly through the serial control panel and even on the serial plotter, but when I check my server I’m not getting anything