Best ESP Board for Relay Module Control with WiFi and Compact Size?

Question

I need an esp board however I don't know which one to choose. I will only use it to control the relay module and connect via wifi to the esp32 board. It also has to be relatively as small as possible. Does anyone have an idea which module would be suitable for this?

rafels · Answer

Probably the best would be the ESP12E or F. They have 4MB of flash, a lot of software goes in and they are easily accessible. It is so small that there is no room for goldpins.
I would avoid the ESP01 modules as they have 512kB and very little Gpio output and are similarly priced to the above. Supposedly 512kB should be enough to control relays, but it varies, new functions and ideas come along. The system itself takes up most of this flash.
However, these are bare modules, requiring power and an external programmer.

Also consider how much Gpio you need and evaluate the modules from that side.

If you are looking for a small devboard then I recommend the Wemos D1 mini. It has power and programming via microUSB and is not much bigger than the bare modules.

Kiboooo · Answer

I was referring more to something like the arduino pro mini, only with wifi.

rafels · Answer

On Wemos, the control solution would be limited to adding a transistor to the Gpio controlling the relays. The code would take a few dozen lines of Lua code on the NodeMCU software. Here examples http://www.nodemcu.com/index_en.html
And that's it.
But you can always try around attaching an additional AVR to the 32 bit mcu.

Kiboooo · Answer

How about this tile in my opinion it would be perfect.

khoam · Answer

If you want to use the ESP8266 as an executive module for a remote relay over WiFi, there are even ready-made modules for this - they use the ESP-01S. .

Kiboooo · Answer

And how do you programme it then?

khoam · Answer

The ESP-01 can be extracted from this module and programmed using a suitable programmer for this - the subject of the programmer for the ESP-01 is covered in this thread .

Kiboooo · Answer

Ok, so he needs this But how to program the esp with the programmer and control the relay, because I can't find this on the internet. How to control this esp with the esp32?

rafels · Answer

This is where you need to learn programming to achieve full flexibility. I don't know if you have any experience with this, but since you are writing about ESP32 you probably already know something. You can program either in C in the Arduino environment or in Lua scripts on the NodeMCU firmware.

If you want to do it without programming, then read about the EasyESP firmware on the internet.

Kiboooo · Answer

I will definitely be programming on the arduino platform, as I already have that one in my little finger.

rafels · Answer

Except that there is a completely different set of libraries for ESP. Actually, only the editor is the same.

Kiboooo · Answer

And where can I find these libraries?

rafels · Answer

And here's how to get started :

Best ESP Board for Relay Module Control with WiFi and Compact Size?

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