How to set up two-way WiFi communication between ESP32 and ESP8266?

1578 7

Treść została przetłumaczona

Zobacz oryginalną wersję tematu

Report a violation of the law

Reply | New topic

#1 17570844 19 Nov 2018 18:37

Anonymous Anonymous

Level 1

» |

Post #1
17570844 19 Nov 2018 18:37

.

I would like to ask as a non-knowledgeable whether such a combination of ESP communication will be trouble free? it is rumoured that esp loses packets is this true?

The ESP8266 will be connected to the display via a UART connector and there will also be a small program to sensor data sent to the display. The ESP32 will be more complex with sensors etc and my idea is that the ESP32 will send data to the ESP8266 and it will send data to the display, i.e. LCD-RS-ESP8266-WIFI-ESP32 two-way communication. How to say I want to do RS over Wifi.

Because I think it would be a better solution for me than LCD-Microprocessor I want to get rid of the number of cables.

From Display to Complete System: How the Solution Team Creates Value at Unisystem [ad]
ADVERTISEMENT
#2 17571525 19 Nov 2018 22:05

Anonymous Anonymous

Level 1

» |

Post #2
17571525 19 Nov 2018 22:05

Jarzabek666 wrote:
I would like to ask, as a non-knowledgeable, whether such an ESP communication setup will be problem-free?
.
Generally it will work, whether there will be problems really depends on 1001 factors.

Jarzabek666 wrote:
ESP8266 will be connected to the display via UART
.
And what model of display is this specifically?

Jarzabek666 wrote:
Because I'm thinking that this would be a better solution for me than the LCD-Microprocessor I want to get rid of the number of cables.

Well then you need to do some reading about I2C - it's just two cables plus power. You will be able to connect the display from I2C to the ESP32.
ADVERTISEMENT
#3 17571630 19 Nov 2018 22:35

Anonymous Anonymous

Level 1

» |

Post #3
17571630 19 Nov 2018 22:35

khoam wrote:
And what model of display is this specifically?

Nextion Hmi

khoam wrote:
Well then you need to do some reading about I2C - it's just two cables plus power. You'll be able to connect the display from I2C to the ESP32.
>

Well in this Nextion is the RX TX also only two cables and also rather to the ESP32 connect but here it is about the distance. Is there any point in ripping a wall at home.

Because I was also thinking about the HC-12 SI4463 but then I would get rid of the sensor at the display.

I've read about this esp-esp bridge and it was often written about packet loss and I've never done that so I don't know if I should go into it, maybe something has improved? The articles were quite long ago and the module changes were for stability.
#4 17571743 19 Nov 2018 23:29

Anonymous Anonymous

Level 1

» |

Post #4
17571743 19 Nov 2018 23:29

Jarzabek666 wrote:
HC-12 SI4463
.
That's a good idea, but I don't know if it's possible to handle the accumulation of this display so directly over a "remote" UART.

Jarzabek666 wrote:
And so I read about tm esp-esp bridge is
.
Wifi just to communicate over the wall between two points? Well generally you can As for packet loss it all depends on the antennas in the ESP - from my experience I can say that without external antennas it looks rather poor.
ADVERTISEMENT
#5 17572356 20 Nov 2018 11:47

ekrzychoooo ekrzychoooo

Level 17

» | Helpful post? (0)

Post #5
17572356 20 Nov 2018 11:47

As for the ESP8266 malfunctioning, IMHO 99% of the problems are due to a bad power supply. Test on contact boards where the power has to "get through" e.g. 6 pins and each pin is e.g. 0.1R. In my experience if the stabiliser has the right capacity (see pdf) and is connected directly to the module pins then no problems. In addition I solder a LOWESR 470uF 8mohm capacitor on the modem and never any signs of malfunction.
#6 17573836 20 Nov 2018 21:24

Anonymous Anonymous

Level 1

» |

Post #6
17573836 20 Nov 2018 21:24

ekrzychoooo wrote:
Test on contact boards where the power supply must "run through" e.g. 6 contacts and each contact is e.g. 0.1R.
.
So let's calculate. The ESP draws a maximum at 240 MHZ clocking of almost 70 mA. For simplicity's sake, let's assume 100 mA, which gives a voltage drop across 6 0.1R resistors connected in series equal to 0.06V. I'm afraid that the voltage fluctuation on the stabiliser is higher, regardless of its efficiency - this can all be measured, preferably with an oscilloscope .
#7 17574046 20 Nov 2018 22:15

ekrzychoooo ekrzychoooo

Level 17

» | Helpful post? (0)

Post #7
17574046 20 Nov 2018 22:15

khoam wrote:
Well, let's count it. The ESP pulls a maximum at 240 MHZ clocking of almost 70ma.
.
70ma is average.
I am not writing this to write just from practice.
Here such an example:
https://www.youtube.com/watch?v=wf_msvWv1jk
ADVERTISEMENT
#8 17574079 20 Nov 2018 22:27

Anonymous Anonymous

Level 1

» |

Post #8
17574079 20 Nov 2018 22:27

ekrzychoooo wrote:
Here such an example:
.
On YT it's music I listen to, and when in doubt about technical matters I look first at Hardware Design Guidelines .
Create an account, log in here. You will receive points by participating in discussions.
Join this discussion.

Install Elektroda application

Didn't find an answer? Ask Artificial Intelligence

*I agree to send the question to OpenAI, Anthropic PBC, Perplexity AI, Inc., Kagi Inc., Google LLC - owners of language models in order to prepare the best response. The companies may monitor and log information entered into the form.

*I agree to publicly display my question and answer. The question and answer will be publicly available to everyone. The process may take a few minutes. Upon completion, you will be redirected to the page with the answer.

Wait...(2min)

Reply | New topic

Report a violation of the law

Topic summary

The discussion addresses establishing two-way WiFi communication between ESP32 and ESP8266 modules, specifically for transmitting sensor data from the ESP32 to an ESP8266-connected Nextion HMI display via UART. Concerns about packet loss in ESP-to-ESP WiFi communication were raised, with responses indicating that packet loss depends on multiple factors including antenna quality and power supply stability. Proper power supply design is critical for ESP8266 reliability, recommending direct connection of a suitable voltage regulator and a low ESR capacitor (e.g., 470µF, 8mΩ) near the module to prevent malfunctions. Alternatives such as I2C for display connection or HC-12 SI4463 modules for wireless communication were mentioned. The feasibility of using WiFi to emulate RS (serial) communication over a wall was acknowledged but noted to depend on environmental conditions and hardware setup.
Summary generated by the language model.

Home page
/
Forum
/
Smart Home
/
Smart Home IoT
/
ESP8266 and ESP32
/
How to set up two-way WiFi communication between ESP32 and ESP8266?

How to set up two-way WiFi communication between ESP32 and ESP8266?

Didn't find an answer? Ask Artificial Intelligence

Topic summary